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1. The TESS-Keck Survey XXI: 13 New Planets and Homogeneous Properties for 21 Subgiant Systems

Author

Chontos, Ashley, Huber, Daniel, Grunblatt, Samuel K., Saunders, Nicholas, Winn, Joshua N., McCormack, Mason, Knudstrup, Emil, Albrecht, Simon H., Crossfield, Ian J. M., Rodriguez, Joseph E., Ciardi, David R., Collins, Karen A., Jenkins, Jon M., Bieryla, Allyson, Batalha, Natalie M., Beard, Corey, Dai, Fei, Dalba, Paul A., Fetherolf, Tara, Giacalone, Steven, Hill, Michelle L., Howard, Andrew W., Isaacson, Howard, Kane, Stephen R., Lubin, Jack, MacDougall, Mason G., Močnik, Teo, Murphy, Joseph M. Akana, Petigura, Erik A., Pidhorodetska, Daria, Polanski, Alex S., Robertson, Paul, Rubenzahl, Ryan A., Turtelboom, Emma V., Weiss, Lauren M., Van Zandt, Judah, Rocker, George R., Vanderspek, Roland, Latham, David W., Seager, Sara, Quinn, Samuel N., Shporer, Avi, Eisner, Nora L., Goeke, Robert F., Levine, Alan M., Ting, Eric B., Howell, Steve, Schlieder, Joshua E., Benni, Paul, Boyle, Andrew W., Gan, Tianjun, Girardin, Eric, Gonzalez, Erica, Gregorio, Joao, Horne, Keith, Livingston, John, Lund, Michael B., Mann, Christopher R., Massey, Bob, Matthews, Elisabeth C., McLeod, Kim K., Palle, Enric, Popowicz, Adam, Relles, Howard M., Schwarz, Richard P., Sefako, Ramotholo, Srdoc, Grego, Tan, Thiam-Guan, Wang, Gavin, and Ziegler, Carl

Subjects
Astrophysics - Earth and Planetary Astrophysics, Astrophysics - Solar and Stellar Astrophysics
Abstract

We present a dedicated transit and radial velocity survey of planets orbiting subgiant stars observed by the TESS Mission. Using $\sim$$16$ nights on Keck/HIRES, we confirm and characterize $12$ new transiting planets -- $\rm TOI-329\,b$, $\rm HD\,39688\,b$ ($\rm TOI-480$), $\rm TOI-603\,b$, $\rm TOI-1199\,b$, $\rm TOI-1294\,b$, $\rm TOI-1439\,b$, $\rm TOI-1605\,b$, $\rm TOI-1828\,b$, $\rm HD\,148193\,b$ ($\rm TOI-1836$), $\rm TOI-1885\,b$, $\rm HD\,83342\,b$ ($\rm TOI-1898$), $\rm TOI-2019\,b$ -- and provide updated properties for 9 previously confirmed TESS subgiant systems ($\rm TOI-197$, $\rm TOI-954$, $\rm TOI-1181$, $\rm TOI-1296$, $\rm TOI-1298$, $\rm TOI-1601$, $\rm TOI-1736$, $\rm TOI-1842$, $\rm TOI-2145$). We also report the discovery of an outer, non-transiting planet, $\rm TOI-1294\,c$ ($P=160.1\pm2.5$ days, $M_{\mathrm{p}}=148.3^{+18.2}_{-16.4} \,M_{\oplus}$), and three additional stars with long-term RV trends. We find that at least $19\pm8\%$ of subgiants in our sample of $21$ stars have outer companions, comparable to main-sequence stars. We perform a homogeneous analysis of the stars and planets in the sample, with median uncertainties of $3\%$, $8\%$ and $15\%$ for planet radii, masses and ages, doubling the number of known planets orbiting subgiant stars with bulk densities measured to better than $10\%$. We observe a dearth of giant planets around evolved stars with short orbital periods, consistent with tidal dissipation theories that predict the rapid inspiral of planets as their host stars leave the main sequence. We note the possible evidence for two distinct classes of hot Jupiter populations, indicating multiple formation channels to explain the observed distributions around evolved stars. Finally, continued RV monitoring of planets in this sample will provide a more comprehensive understanding of demographics for evolved planetary systems., Comment: 22 pages, 9 figures, 9 tables

Published
2024

2. Giant Outer Transiting Exoplanet Mass (GOT 'EM) Survey: III. Recovery and Confirmation of a Temperate, Mildly Eccentric, Single-Transit Jupiter Orbiting TOI-2010

Author

Mann, Christopher R., Dalba, Paul A., Lafrenière, David, Fulton, Benjamin J., Hébrard, Guillaume, Boisse, Isabelle, Dalal, Shweta, Deleuil, Magali, Delfosse, Xavier, Demangeon, Olivier, Forveille, Thierry, Heidari, Neda, Kiefer, Flavien, Martioli, Eder, Moutou, Claire, Endl, Michael, Cochran, William D., MacQueen, Phillip, Marchis, Franck, Dragomir, Diana, Gupta, Arvind F., Feliz, Dax L., Nicholson, Belinda A., Ziegler, Carl, Villanueva Jr., Steven, Rowe, Jason, Talens, Geert Jan, Thorngren, Daniel, LaCourse, Daryll, Jacobs, Tom, Howard, Andrew W., Bieryla, Allyson, Latham, David W., Rabus, Markus, Fetherolf, Tara, Hellier, Coel, Howell, Steve B., Plavchan, Peter, Reefe, Michael, Combs, Deven, Bowen, Michael, Wittrock, Justin, Ricker, George R., Seager, S., Winn, Joshua N., Jenkins, Jon M., Barclay, Thomas, Watanabe, David, Collins, Karen A., Eastman, Jason D., and Ting, Eric B.

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

Large-scale exoplanet surveys like the TESS mission are powerful tools for discovering large numbers of exoplanet candidates. Single-transit events are commonplace within the resulting candidate list due to the unavoidable limitation of observing baseline. These single-transit planets often remain unverified due to their unknown orbital period and consequent difficulty in scheduling follow up observations. In some cases, radial velocity (RV) follow up can constrain the period enough to enable a future targeted transit detection. We present the confirmation of one such planet: TOI-2010 b. Nearly three years of RV coverage determined the period to a level where a broad window search could be undertaken with the Near-Earth Object Surveillance Satellite (NEOSSat), detecting an additional transit. An additional detection in a much later TESS sector solidified our final parameter estimation. We find TOI-2010 b to be a Jovian planet ($M_P = 1.29 \ M_{\rm Jup}$, $R_P = 1.05 \ R_{\rm Jup}$) on a mildly eccentric orbit ($e = 0.21$) with a period of $P = 141.83403$ days. Assuming a simple model with no albedo and perfect heat redistribution, the equilibrium temperature ranges from about 360 K to 450 K from apoastron to periastron. Its wide orbit and bright host star ($V=9.85$) make TOI-2010 b a valuable test-bed for future low-insolation atmospheric analysis., Comment: 27 pages, 10 figures, 6 tables

Published
2023
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3. TOI-199 b: A well-characterized 100-day transiting warm giant planet with TTVs seen from Antarctica

Author

Hobson, Melissa J., Trifonov, Trifon, Henning, Thomas, Jordán, Andrés, Rojas, Felipe, Espinoza, Nestor, Brahm, Rafael, Eberhardt, Jan, Jones, Matías I., Mekarnia, Djamel, Kossakowski, Diana, Schlecker, Martin, Pinto, Marcelo Tala, Miranda, Pascal José Torres, Abe, Lyu, Barkaoui, Khalid, Bendjoya, Philippe, Bouchy, François, Buttu, Marco, Carleo, Ilaria, Collins, Karen A., Colón, Knicole D., Crouzet, Nicolas, Dragomir, Diana, Dransfield, Georgina, Gasparetto, Thomas, Goeke, Robert F., Guillot, Tristan, Günther, Maximilian N., Howard, Saburo, Jenkins, Jon M., Korth, Judith, Latham, David W., Lendl, Monika, Lissauer, Jack J., Mann, Christopher R., Mireles, Ismael, Ricker, George R., Saesen, Sophie, Schwarz, Richard P., Seager, S., Sefako, Ramotholo, Shporer, Avi, Stockdale, Chris, Suarez, Olga, Tan, Thiam-Guan, Triaud, Amaury H. M. J., Ulmer-Moll, Solène, Vanderspek, Roland, Winn, Joshua N., Wohler, Bill, and Zhou, George

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

We present the spectroscopic confirmation and precise mass measurement of the warm giant planet TOI-199 b. This planet was first identified in TESS photometry and confirmed using ground-based photometry from ASTEP in Antarctica including a full 6.5$\,$h long transit, PEST, Hazelwood, and LCO; space photometry from NEOSSat; and radial velocities (RVs) from FEROS, HARPS, CORALIE, and CHIRON. Orbiting a late G-type star, TOI-199\,b has a $\mathrm{104.854_{-0.002}^{+0.001} \, d}$ period, a mass of $\mathrm{0.17\pm0.02 \, M_J}$, and a radius of $\mathrm{0.810\pm0.005 \, R_J}$. It is the first warm exo-Saturn with a precisely determined mass and radius. The TESS and ASTEP transits show strong transit timing variations, pointing to the existence of a second planet in the system. The joint analysis of the RVs and TTVs provides a unique solution for the non-transiting companion TOI-199 c, which has a period of $\mathrm{273.69_{-0.22}^{+0.26} \, d}$ and an estimated mass of $\mathrm{0.28_{-0.01}^{+0.02} \, M_J}$. This period places it within the conservative Habitable Zone., Comment: 33 pages, 23 figures. Accepted for publication in AJ

Published
2023

4. Identification of the Top TESS Objects of Interest for Atmospheric Characterization of Transiting Exoplanets with JWST

Author

Hord, Benjamin J., Kempton, Eliza M. -R., Mikal-Evans, Thomas, Latham, David W., Ciardi, David R., Dragomir, Diana, Colón, Knicole D., Ross, Gabrielle, Vanderburg, Andrew, de Beurs, Zoe L., Collins, Karen A., Watkins, Cristilyn N., Bean, Jacob, Cowan, Nicolas B., Daylan, Tansu, Morley, Caroline V., Ih, Jegug, Baker, David, Barkaoui, Khalid, Batalha, Natalie M., Behmard, Aida, Belinski, Alexander, Benkhaldoun, Zouhair, Benni, Paul, Bernacki, Krzysztof, Bieryla, Allyson, Binnenfeld, Avraham, Bosch-Cabot, Pau, Bouchy, François, Bozza, Valerio, Brahm, Rafael, Buchhave, Lars A., Calkins, Michael, Chontos, Ashley, Clark, Catherine A., Cloutier, Ryan, Cointepas, Marion, Collins, Kevin I., Conti, Dennis M., Crossfield, Ian J. M., Dai, Fei, de Leon, Jerome P., Dransfield, Georgina, Dressing, Courtney, Dustor, Adam, Esquerdo, Gilbert, Evans, Phil, Fajardo-Acosta, Sergio B., Fiołka, Jerzy, Forés-Toribio, Raquel, Frasca, Antonio, Fukui, Akihiko, Fulton, Benjamin, Furlan, Elise, Gan, Tianjun, Gandolfi, Davide, Ghachoui, Mourad, Giacalone, Steven, Gilbert, Emily A., Gillon, Michaël, Girardin, Eric, Gonzales, Erica, Horta, Ferran Grau, Gregorio, Joao, Greklek-McKeon, Michael, Guerra, Pere, Hartman, J. D., Hellier, Coel, Hełminiak, Krzysztof G., Henning, Thomas, Hill, Michelle L., Horne, Keith, Howard, Andrew W., Howell, Steve B., Huber, Daniel, Isaacson, Howard, Isopi, Giovanni, Jehin, Emmanuel, Jenkins, Jon M., Jensen, Eric L. N., Johnson, Marshall C., Jordán, Andrés, Kane, Stephen R., Kielkopf, John F., Krushinsky, Vadim, Lasota, Sławomir, Lee, Elena, Lewin, Pablo, Livingston, John H., Lubin, Jack, Lund, Michael B., Mallia, Franco, Mann, Christopher R., Marino, Giuseppe, Maslennikova, Nataliia, Massey, Bob, Matson, Rachel, Matthews, Elisabeth, Mayo, Andrew W., Mazeh, Tsevi, McLeod, Kim K., Michaels, Edward J., Močnik, Teo, Mori, Mayuko, Mraz, Georgia, Muñoz, Jose A., Narita, Norio, Nielsen, Louise Dyregaard, Osborn, Hugh, Palle, Enric, Panahi, Aviad, Papini, Riccardo, Polanski, Alex S., Popowicz, Adam, Pozuelos, Francisco J., Quinn, Samuel N., Radford, Don J., Reed, Phillip A., Relles, Howard M., Rice, Malena, Robertson, Paul, Rodriguez, Joseph E., Rosenthal, Lee J., Rubenzahl, Ryan A., Schanche, Nicole, Schlieder, Joshua, Schwarz, Richard P., Sefako, Ramotholo, Shporer, Avi, Sozzetti, Alessandro, Srdoc, Gregor, Stockdale, Chris, Tarasenkov, Alexander, Tan, Thiam-Guan, Timmermans, Mathilde, Ting, Eric B., Van Zandt, Judah, Vignes, JP, Waite, Ian, Watanabe, Noriharu, Weiss, Lauren M., Wittrock, Justin, Zhou, George, Ziegler, Carl, and Zucker, Shay

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

JWST has ushered in an era of unprecedented ability to characterize exoplanetary atmospheres. While there are over 5,000 confirmed planets, more than 4,000 TESS planet candidates are still unconfirmed and many of the best planets for atmospheric characterization may remain to be identified. We present a sample of TESS planets and planet candidates that we identify as "best-in-class" for transmission and emission spectroscopy with JWST. These targets are sorted into bins across equilibrium temperature $T_{\mathrm{eq}}$ and planetary radius $R{_\mathrm{p}}$ and are ranked by transmission and emission spectroscopy metric (TSM and ESM, respectively) within each bin. In forming our target sample, we perform cuts for expected signal size and stellar brightness, to remove sub-optimal targets for JWST. Of the 194 targets in the resulting sample, 103 are unconfirmed TESS planet candidates, also known as TESS Objects of Interest (TOIs). We perform vetting and statistical validation analyses on these 103 targets to determine which are likely planets and which are likely false positives, incorporating ground-based follow-up from the TESS Follow-up Observation Program (TFOP) to aid the vetting and validation process. We statistically validate 23 TOIs, marginally validate 33 TOIs to varying levels of confidence, deem 29 TOIs likely false positives, and leave the dispositions for 4 TOIs as inconclusive. 14 of the 103 TOIs were confirmed independently over the course of our analysis. We provide our final best-in-class sample as a community resource for future JWST proposals and observations. We intend for this work to motivate formal confirmation and mass measurements of each validated planet and encourage more detailed analysis of individual targets by the community., Comment: Submitted to AJ. Machine-readable versions of Tables 2 and 3 are included. 40 pages, 7 figures, 3 tables

Published
2023

5. VaTEST II: Statistical Validation of 11 TESS-Detected Exoplanets Orbiting K-type Stars

Author

Mistry, Priyashkumar, Pathak, Kamlesh, Prasad, Aniket, Lekkas, Georgios, Bhattarai, Surendra, Gharat, Sarvesh, Maity, Mousam, Kumar, Dhruv, Collins, Karen A., Schwarz, Richard P., Mann, Christopher R., Furlan, Elise, Howell, Steve B., Ciardi, David, Bieryla, Allyson, Matthews, Elisabeth C., Gonzales, Erica, Ziegler, Carl, Crossfield, Ian, Giacalone, Steven, Tan, Thiam-Guan, Evans, Phil, Helminiak, Krzysztof G., Collins, Kevin I., Narita, Norio, Fukui, Akihiko, Pozuelos, Francisco J., Dressing, Courtney, Soubkiou, Abderahmane, Benkhaldoun, Zouhair, Schlieder, Joshua E., Suarez, Olga, Barkaoui, Khalid, Palle, Enric, Murgas, Felipe, Srdoc, Gregor, Goliguzova, Maria V., Strakhov, Ivan A., Gnilka, Crystal, Lester, Kathryn, Littlefield, Colin, Scott, Nic, Matson, Rachel, Gillon, Michael, Jehin, Emmanuel, Timmermans, Mathilde, Ghachoui, Mourad, Abe, Lyu, Bendjoya, Philippe, Guillot, Tristan, and Triaud, Amaury H. M. J.

Subjects
Astrophysics - Earth and Planetary Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

NASA's Transiting Exoplanet Survey Satellite (TESS) is an all-sky survey mission designed to find transiting exoplanets orbiting nearby bright stars. It has identified more than 329 transiting exoplanets, and almost 6,000 candidates remain unvalidated. In this manuscript, we discuss the findings from the ongoing VaTEST (Validation of Transiting Exoplanets using Statistical Tools) project, which aims to validate new exoplanets for further characterization. We validated 11 new exoplanets by examining the light curves of 24 candidates using the LATTE and TESS-Plot tools and computing the False Positive Probabilities using the statistical validation tool TRICERATOPS. These include planets suitable for atmospheric characterization using transmission spectroscopy (TOI-2194b), emission spectroscopy (TOI-3082b and TOI-5704b) and for both transmission and emission spectroscopy (TOI-672b, TOI- 1694b, and TOI-2443b); One super-Earth (TOI-2194b) orbiting a bright (V = 8.42 mag), metal-poor ([Fe/H] = -0.3720 $\pm$ 0.1) star; one short-period Neptune-like planet (TOI-5704) in the Hot Neptune Desert. In total, we validated 1 super-Earth, 7 sub-Neptunes, 1 Neptune-like, and 2 sub-Saturn or super-Neptune-like exoplanets. Additionally, we identify five likely planet candidates (TOI-323, TOI- 1180, TOI-2200, TOI-2408 and TOI-3913) which can be further studied to establish their planetary nature., Comment: Accepted for Publication in Astronomical Journal, 28 Pages, 7 Figures

Published
2023
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6. Validation of TOI-1221 b: A warm sub-Neptune exhibiting TTVs around a Sun-like star

Author

Mann, Christopher R., Lafrenière, David, Dragomir, Diana, Quinn, Samuel N., Tan, Thiam-Guan, Collins, Karen A., Howell, Steve B., Ziegler, Carl, Mann, Andrew W., Stassun, Keivan G., Kristiansen, Martti H., Osborn, Hugh, Boyajian, Tabetha, Eisner, Nora, Hellier, Coel, Ricker, George R., Vanderspek, Roland, Latham, David W., Seager, S., Winn, Joshua N., Jenkins, Jon M., Villaseñor, Jesus Noel, McLean, Brian, Rowden, Pamela, Torres, Guillermo, Caldwell, Douglas A., Collins, Kevin I., and Schwarz, Richard P.

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

We present a validation of the long-period ($91.68278^{+0.00032}_{-0.00041}$ days) transiting sub-Neptune planet TOI-1221 b (TIC 349095149.01) around a Sun-like (m$_{\rm V}$=10.5) star. This is one of the few known exoplanets with period >50 days, and belongs to the even smaller subset of which have bright enough hosts for detailed spectroscopic follow-up. We combine TESS light curves and ground-based time-series photometry from PEST (0.3~m) and LCOGT (1.0~m) to analyze the transit signals and rule out nearby stars as potential false positive sources. High-contrast imaging from SOAR and Gemini/Zorro rule out nearby stellar contaminants. Reconnaissance spectroscopy from CHIRON sets a planetary scale upper mass limit on the transiting object (1.1 and 3.5 M$_{\rm Jup}$ at 1$\sigma$ and 3$\sigma$, respectively) and shows no sign of a spectroscopic binary companion. We determine a planetary radius of $R_{\rm p} = 2.91^{+0.13}_{-0.12} R_{\oplus}$, placing it in the sub-Neptune regime. With a stellar insolation of $S = 6.06^{+0.85}_{-0.77}\ S_{\oplus}$, we calculate a moderate equilibrium temperature of $T_{\rm eq} =$ 440 K, assuming no albedo and perfect heat redistribution. We find a false positive probability from TRICERATOPS of FPP $ = 0.0014 \pm 0.0003$ as well as other qualitative and quantitative evidence to support the statistical validation of TOI-1221 b. We find significant evidence (>$5\sigma$) of oscillatory transit timing variations, likely indicative of an additional non-transiting planet., Comment: 17 pages, 9 figures, 4 tables

Published
2022
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7. The TESS-Keck Survey. XI. Mass Measurements for Four Transiting sub-Neptunes orbiting K dwarf TOI-1246

Author

Turtelboom, Emma V., Weiss, Lauren M., Dressing, Courtney D., Nowak, Grzegorz, Pallé, Enric, Beard, Corey, Blunt, Sarah, Brinkman, Casey, Chontos, Ashley, Claytor, Zachary R., Dai, Fei, Dalba, Paul A., Giacalone, Steven, Gonzales, Erica, Harada, Caleb K., Hill, Michelle L., Holcomb, Rae, Korth, Judith, Lubin, Jack, Masseron, Thomas, MacDougall, Mason, Mayo, Andrew W., Močnik, Teo, Murphy, Joseph M. Akana, Polanski, Alex S., Rice, Malena, Rubenzahl, Ryan A., Scarsdale, Nicholas, Stassun, Keivan G., Tyler, Dakotah B., Van Zandt, Judah, Crossfield, Ian J. M., Deeg, Hans J., Fulton, Benjamin, Gandolfi, Davide, Howard, Andrew W., Huber, Dan, Isaacson, Howard, Kane, Stephen R., Lam, Kristine W. F., Luque, Rafael, Martín, Eduardo L., Morello, Giuseppe, Orell-Miquel, Jaume, Petigura, Erik A., Robertson, Paul, Roy, Arpita, Van Eylen, Vincent, Baker, David, Belinski, Alexander A., Bieryla, Allyson, Ciardi, David R., Collins, Karen A., Cutting, Neil, Della-Rose, Devin J., Ellingsen, Taylor B., Furlan, E., Gan, Tianjun, Gnilka, Crystal L., Guerra, Pere, Howell, Steve B., Jimenez, Mary, Latham, David W., Larivière, Maude, Lester, Kathryn V., Lillo-Box, Jorge, Luker, Lindy, Mann, Christopher R., Plavchan, Peter P., Safonov, Boris, Skinner, Brett, Strakhov, Ivan A., Wittrock, Justin M., Caldwell, Douglas A., Essack, Zahra, Jenkins, Jon M., Quintana, Elisa V., Ricker, George R., Vanderspek, Roland, Seager, S., and Winn, Joshua N.

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

Multi-planet systems are valuable arenas for investigating exoplanet architectures and comparing planetary siblings. TOI-1246 is one such system, with a moderately bright K dwarf ($\rm{V=11.6,~K=9.9}$) and four transiting sub-Neptunes identified by TESS with orbital periods of $4.31~\rm{d},~5.90~\rm{d},~18.66~\rm{d}$, and $~37.92~\rm{d}$. We collected 130 radial velocity observations with Keck/HIRES and TNG/HARPS-N to measure planet masses. We refit the 14 sectors of TESS photometry to refine planet radii ($\rm{2.97 \pm 0.06~R_\oplus},\rm{2.47 \pm 0.08~R_\oplus}, \rm{3.46 \pm 0.09~R_\oplus}$, $\rm{3.72 \pm 0.16~R_\oplus}$), and confirm the four planets. We find that TOI-1246 e is substantially more massive than the three inner planets ($\rm{8.1 \pm 1.1 M_\oplus}$, $\rm{8.8 \pm 1.2 M_\oplus}$, $\rm{5.3 \pm 1.7 M_\oplus}$, $\rm{14.8 \pm 2.3 M_\oplus}$). The two outer planets, TOI-1246 d and TOI-1246 e, lie near to the 2:1 resonance ($\rm{P_{e}/P_{d}=2.03}$) and exhibit transit timing variations. TOI-1246 is one of the brightest four-planet systems, making it amenable for continued observations. It is one of only six systems with measured masses and radii for all four transiting planets. The planet densities range from $\rm{0.70 \pm 0.24}$ to $3.21 \pm 0.44 \rm{g/cm^3}$, implying a range of bulk and atmospheric compositions. We also report a fifth planet candidate found in the RV data with a minimum mass of 25.6 $\pm$ 3.6 $\rm{M_\oplus}$. This planet candidate is exterior to TOI-1246 e with a candidate period of 93.8 d, and we discuss the implications if it is confirmed to be planetary in nature., Comment: Accepted at The Astronomical Journal; 33 pages, 10 figures

Published
2022
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8. The TESS-Keck Survey. VIII. Confirmation of a Transiting Giant Planet on an Eccentric 261 day Orbit with the Automated Planet Finder Telescope

Author

Dalba, Paul A., Kane, Stephen R., Dragomir, Diana, Villanueva Jr., Steven, Collins, Karen A., Jacobs, Thomas Lee, Lacourse, Daryll M., Gagliano, Robert, Kristiansen, Martti H., Omohundro, Mark, Schwengeler, Hans M., Terentev, Ivan A., Vanderburg, Andrew, Fulton, Benjamin, Isaacson, Howard, Van Zandt, Judah, Howard, Andrew W., Thorngren, Daniel P., Howell, Steve B., Batalha, Natalie M., Chontos, Ashley, Crossfield, Ian J. M., Dressing, Courtney D., Huber, Daniel, Petigura, Erik A., Robertson, Paul, Roy, Arpita, Weiss, Lauren M., Behmard, Aida, Beard, Corey, Brinkman, Casey L., Giacalone, Steven, Hill, Michelle L., Lubin, Jack, Mayo, Andrew W., Močnik, Teo, Murphy, Joseph M. Akana, Polanski, Alex S., Rice, Malena, Rosenthal, Lee J., Rubenzahl, Ryan A., Scarsdale, Nicholas, Turtelboom, Emma V., Tyler, Dakotah, Benni, Paul, Boyce, Pat, Esposito, Thomas M., Girardin, E., Laloum, Didier, Lewin, Pablo, Mann, Christopher R., Marchis, Franck, Schwarz, Richard P., Srdoc, Gregor, Steuer, Jana, Sivarani, Thirupathi, Unni, Athira, Eisner, Nora L., Fetherolf, Tara, Li, Zhexing, Yao, Xinyu, Pepper, Joshua, Ricker, George R., Vanderspek, Roland, Latham, David W., Seager, S., Winn, Joshua N., Jenkins, Jon M., Burke, Christopher J., Eastman, Jason D., Lund, Michael B., Rodriguez, David R., Rowden, Pamela, Ting, Eric B., and Villaseñor, Jesus Noel

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

We report the discovery of TOI-2180 b, a 2.8 $M_{\rm J}$ giant planet orbiting a slightly evolved G5 host star. This planet transited only once in Cycle 2 of the primary Transiting Exoplanet Survey Satellite (TESS) mission. Citizen scientists identified the 24 hr single-transit event shortly after the data were released, allowing a Doppler monitoring campaign with the Automated Planet Finder telescope at Lick Observatory to begin promptly. The radial velocity observations refined the orbital period of TOI-2180 b to be 260.8$\pm$0.6 days, revealed an orbital eccentricity of 0.368$\pm$0.007, and discovered long-term acceleration from a more distant massive companion. We conducted ground-based photometry from 14 sites spread around the globe in an attempt to detect another transit. Although we did not make a clear transit detection, the nondetections improved the precision of the orbital period. We predict that TESS will likely detect another transit of TOI-2180 b in Sector 48 of its extended mission. We use giant planet structure models to retrieve the bulk heavy-element content of TOI-2180 b. When considered alongside other giant planets with orbital periods over 100 days, we find tentative evidence that the correlation between planet mass and metal enrichment relative to stellar is dependent on orbital properties. Single-transit discoveries like TOI-2180 b highlight the exciting potential of the TESS mission to find planets with long orbital periods and low irradiation fluxes despite the selection biases associated with the transit method., Comment: Published in AJ

Published
2022
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9. Planetary Embryo Bow Shocks as a Mechanism for Chondrule Formation

Author

Mann, Christopher R., Boley, Aaron C., and Morris, Melissa M.

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

We use radiation hydrodynamics with direct particle integration to explore the feasibility of chondrule formation in planetary embryo bow shocks. The calculations presented here are used to explore the consequences of a Mars-size planetary embryo traveling on a moderately excited orbit through the dusty, early environment of the solar system. The embryo's eccentric orbit produces a range of supersonic relative velocities between the embryo and the circularly orbiting gas and dust, prompting the formation of bow shocks. Temporary atmospheres around these embryos, which can be created via volatile outgassing and gas capture from the surrounding nebula, can non-trivially affect thermal profiles of solids entering the shock. We explore the thermal environment of solids that traverse the bow shock at different impact radii, the effects that planetoid atmospheres have on shock morphologies, and the stripping efficiency of planetoidal atmospheres in the presence of high relative winds. Simulations are run using adiabatic and radiative conditions, with multiple treatments for the local opacities. Shock speeds of 5, 6, and 7 km/s are explored. We find that a high-mass atmosphere and inefficient radiative conditions can produce peak temperatures and cooling rates that are consistent with the constraints set by chondrule furnace studies. For most conditions, the derived cooling rates are potentially too high to be consistent with chondrule formation., Comment: 28 pages, 19 figures

Published
2016
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10. Identification of the Top TESS Objects of Interest for Atmospheric Characterization of Transiting Exoplanets with JWST

Author

Hord, Benjamin J., primary, Kempton, Eliza M.-R., additional, M. Evans-Soma, Thomas, additional, Latham, David W., additional, Ciardi, David R., additional, Dragomir, Diana, additional, Colón, Knicole D., additional, Ross, Gabrielle, additional, Vanderburg, Andrew, additional, de Beurs, Zoe L., additional, Collins, Karen A., additional, Watkins, Cristilyn N., additional, Bean, Jacob, additional, Cowan, Nicolas B., additional, Daylan, Tansu, additional, Morley, Caroline V., additional, Ih, Jegug, additional, Baker, David, additional, Barkaoui, Khalid, additional, Batalha, Natalie M., additional, Behmard, Aida, additional, Belinski, Alexander, additional, Benkhaldoun, Zouhair, additional, Benni, Paul, additional, Bernacki, Krzysztof, additional, Bieryla, Allyson, additional, Binnenfeld, Avraham, additional, Bosch-Cabot, Pau, additional, Bouchy, Franccois, additional, Bozza, Valerio, additional, Brahm, Rafael, additional, Buchhave, Lars A., additional, Calkins, Michael, additional, Chontos, Ashley, additional, Clark, Catherine A., additional, Cloutier, Ryan, additional, Cointepas, Marion, additional, Collins, Kevin I., additional, Conti, Dennis M., additional, Crossfield, Ian J. M., additional, Dai, Fei, additional, de Leon, Jerome P., additional, Dransfield, Georgina, additional, Dressing, Courtney, additional, Dustor, Adam, additional, Esquerdo, Gilbert, additional, Evans, Phil, additional, Fajardo-Acosta, Sergio B., additional, Fiołka, Jerzy, additional, Forés-Toribio, Raquel, additional, Frasca, Antonio, additional, Fukui, Akihiko, additional, Fulton, Benjamin, additional, Furlan, Elise, additional, Gan, Tianjun, additional, Gandolfi, Davide, additional, Ghachoui, Mourad, additional, Giacalone, Steven, additional, Gilbert, Emily A., additional, Gillon, Michaël, additional, Girardin, Eric, additional, Gonzales, Erica, additional, Horta, Ferran Grau, additional, Gregorio, Joao, additional, Greklek-McKeon, Michael, additional, Guerra, Pere, additional, Hartman, J. D., additional, Hellier, Coel, additional, Helm, Ian, additional, Hełminiak, Krzysztof G., additional, Henning, Thomas, additional, Hill, Michelle L., additional, Horne, Keith, additional, Howard, Andrew W., additional, Howell, Steve B., additional, Huber, Daniel, additional, Isopi, Giovanni, additional, Jehin, Emmanuel, additional, Jenkins, Jon M., additional, Jensen, Eric L. N., additional, Johnson, Marshall C., additional, Jordán, Andrés, additional, Kane, Stephen R., additional, Kielkopf, John F., additional, Krushinsky, Vadim, additional, Lasota, Sławomir, additional, Lee, Elena, additional, Lewin, Pablo, additional, Livingston, John H., additional, Lubin, Jack, additional, Lund, Michael B., additional, Mallia, Franco, additional, Mann, Christopher R., additional, Marino, Giuseppi, additional, Maslennikova, Nataliia, additional, Massey, Bob, additional, Matson, Rachel, additional, Matthews, Elisabeth, additional, Mayo, Andrew W., additional, Mazeh, Tsevi, additional, McLeod, Kim K., additional, Michaels, Edward J., additional, Močnik, Teo, additional, Mori, Mayuko, additional, Mraz, Georgia, additional, Muñoz, Jose A., additional, Narita, Norio, additional, Natarajan, Krupa, additional, Dyregaard Nielsen, Louise, additional, Osborn, Hugh, additional, Palle, Enric, additional, Panahi, Aviad, additional, Papini, Riccardo, additional, Plavchan, Peter, additional, Polanski, Alex S., additional, Popowicz, Adam, additional, Pozuelos, Francisco J., additional, Quinn, Samuel N., additional, Radford, Don J., additional, Reed, Phillip A., additional, Relles, Howard M., additional, Rice, Malena, additional, Robertson, Paul, additional, Rodriguez, Joseph E., additional, Rosenthal, Lee J., additional, Rubenzahl, Ryan A., additional, Schanche, Nicole, additional, Schlieder, Joshua, additional, Schwarz, Richard P., additional, Sefako, Ramotholo, additional, Shporer, Avi, additional, Sozzetti, Alessandro, additional, Srdoc, Gregor, additional, Stockdale, Chris, additional, Tarasenkov, Alexander, additional, Tan, Thiam-Guan, additional, Timmermans, Mathilde, additional, Ting, Eric B., additional, Van Zandt, Judah, additional, Vignes, JP, additional, Waite, Ian, additional, Watanabe, Noriharu, additional, Weiss, Lauren M., additional, Wittrock, Justin, additional, Zhou, George, additional, Ziegler, Carl, additional, and Zucker, Shay, additional

Published
2024
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11. Identification of the Top TESS Objects of Interest for Atmospheric Characterization of Transiting Exoplanets with JWST

Author

Hord, Benjamin J., Kempton, Eliza M.-r., Evans-soma, Thomas M., Latham, David W., Ciardi, David R., Dragomir, Diana, Colón, Knicole D., Ross, Gabrielle, Vanderburg, Andrew, De Beurs, Zoe L., Collins, Karen A., Watkins, Cristilyn N., Bean, Jacob, Cowan, Nicolas B., Daylan, Tansu, Morley, Caroline V., Ih, Jegug, Baker, David, Barkaoui, Khalid, Batalha, Natalie M., Behmard, Aida, Belinski, Alexander, Benkhaldoun, Zouhair, Benni, Paul, Bernacki, Krzysztof, Bieryla, Allyson, Binnenfeld, Avraham, Bosch-cabot, Pau, Bouchy, François, Bozza, Valerio, Brahm, Rafael, Buchhave, Lars A., Calkins, Michael, Chontos, Ashley, Clark, Catherine A., Cloutier, Ryan, Cointepas, Marion, Collins, Kevin I., Conti, Dennis M., Crossfield, Ian J. M., Dai, Fei, De Leon, Jerome P., Dransfield, Georgina, Dressing, Courtney, Dustor, Adam, Esquerdo, Gilbert, Evans, Phil, Fajardo-acosta, Sergio B., Fiołka, Jerzy, Forés-toribio, Raquel, Frasca, Antonio, Fukui, Akihiko, Fulton, Benjamin, Furlan, Elise, Gan, Tianjun, Gandolfi, Davide, Ghachoui, Mourad, Giacalone, Steven, Gilbert, Emily A., Gillon, Michaël, Girardin, Eric, Gonzales, Erica, Grau Horta, Ferran, Gregorio, Joao, Greklek-mckeon, Michael, Guerra, Pere, Hartman, J. D., Hellier, Coel, Helm, Ian, Hełminiak, Krzysztof G., Henning, Thomas, Hill, Michelle L., Horne, Keith, Howard, Andrew W., Howell, Steve B., Huber, Daniel, Isopi, Giovanni, Jehin, Emmanuel, Jenkins, Jon M., Jensen, Eric L. N., Johnson, Marshall C., Jordán, Andrés, Kane, Stephen R., Kielkopf, John F., Krushinsky, Vadim, Lasota, Sławomir, Lee, Elena, Lewin, Pablo, Livingston, John H., Lubin, Jack, Lund, Michael B., Mallia, Franco, Mann, Christopher R., Marino, Giuseppi, Maslennikova, Nataliia, Massey, Bob, Matson, Rachel, Matthews, Elisabeth, Mayo, Andrew W., Mazeh, Tsevi, Mcleod, Kim K., Michaels, Edward J., Močnik, Teo, Mori, Mayuko, Mraz, Georgia, Muñoz, Jose A., Narita, Norio, Natarajan, Krupa, Dyregaard Nielsen, Louise, Osborn, Hugh, Palle, Enric, Panahi, Aviad, Papini, Riccardo, Plavchan, Peter, Polanski, Alex S., Popowicz, Adam, Pozuelos, Francisco J., Quinn, Samuel N., Radford, Don J., Reed, Phillip A., Relles, Howard M., Rice, Malena, Robertson, Paul, Rodriguez, Joseph E., Rosenthal, Lee J., Rubenzahl, Ryan A., Schanche, Nicole, Schlieder, Joshua, Schwarz, Richard P., Sefako, Ramotholo, Shporer, Avi, Sozzetti, Alessandro, Srdoc, Gregor, Stockdale, Chris, Tarasenkov, Alexander, Tan, Thiam-guan, Timmermans, Mathilde, Ting, Eric B., Van Zandt, Judah, Vignes, Jp, Waite, Ian, Watanabe, Noriharu, Weiss, Lauren M., Wittrock, Justin, Zhou, George, Ziegler, Carl, Zucker, Shay, Hord, Benjamin J., Kempton, Eliza M.-r., Evans-soma, Thomas M., Latham, David W., Ciardi, David R., Dragomir, Diana, Colón, Knicole D., Ross, Gabrielle, Vanderburg, Andrew, De Beurs, Zoe L., Collins, Karen A., Watkins, Cristilyn N., Bean, Jacob, Cowan, Nicolas B., Daylan, Tansu, Morley, Caroline V., Ih, Jegug, Baker, David, Barkaoui, Khalid, Batalha, Natalie M., Behmard, Aida, Belinski, Alexander, Benkhaldoun, Zouhair, Benni, Paul, Bernacki, Krzysztof, Bieryla, Allyson, Binnenfeld, Avraham, Bosch-cabot, Pau, Bouchy, François, Bozza, Valerio, Brahm, Rafael, Buchhave, Lars A., Calkins, Michael, Chontos, Ashley, Clark, Catherine A., Cloutier, Ryan, Cointepas, Marion, Collins, Kevin I., Conti, Dennis M., Crossfield, Ian J. M., Dai, Fei, De Leon, Jerome P., Dransfield, Georgina, Dressing, Courtney, Dustor, Adam, Esquerdo, Gilbert, Evans, Phil, Fajardo-acosta, Sergio B., Fiołka, Jerzy, Forés-toribio, Raquel, Frasca, Antonio, Fukui, Akihiko, Fulton, Benjamin, Furlan, Elise, Gan, Tianjun, Gandolfi, Davide, Ghachoui, Mourad, Giacalone, Steven, Gilbert, Emily A., Gillon, Michaël, Girardin, Eric, Gonzales, Erica, Grau Horta, Ferran, Gregorio, Joao, Greklek-mckeon, Michael, Guerra, Pere, Hartman, J. D., Hellier, Coel, Helm, Ian, Hełminiak, Krzysztof G., Henning, Thomas, Hill, Michelle L., Horne, Keith, Howard, Andrew W., Howell, Steve B., Huber, Daniel, Isopi, Giovanni, Jehin, Emmanuel, Jenkins, Jon M., Jensen, Eric L. N., Johnson, Marshall C., Jordán, Andrés, Kane, Stephen R., Kielkopf, John F., Krushinsky, Vadim, Lasota, Sławomir, Lee, Elena, Lewin, Pablo, Livingston, John H., Lubin, Jack, Lund, Michael B., Mallia, Franco, Mann, Christopher R., Marino, Giuseppi, Maslennikova, Nataliia, Massey, Bob, Matson, Rachel, Matthews, Elisabeth, Mayo, Andrew W., Mazeh, Tsevi, Mcleod, Kim K., Michaels, Edward J., Močnik, Teo, Mori, Mayuko, Mraz, Georgia, Muñoz, Jose A., Narita, Norio, Natarajan, Krupa, Dyregaard Nielsen, Louise, Osborn, Hugh, Palle, Enric, Panahi, Aviad, Papini, Riccardo, Plavchan, Peter, Polanski, Alex S., Popowicz, Adam, Pozuelos, Francisco J., Quinn, Samuel N., Radford, Don J., Reed, Phillip A., Relles, Howard M., Rice, Malena, Robertson, Paul, Rodriguez, Joseph E., Rosenthal, Lee J., Rubenzahl, Ryan A., Schanche, Nicole, Schlieder, Joshua, Schwarz, Richard P., Sefako, Ramotholo, Shporer, Avi, Sozzetti, Alessandro, Srdoc, Gregor, Stockdale, Chris, Tarasenkov, Alexander, Tan, Thiam-guan, Timmermans, Mathilde, Ting, Eric B., Van Zandt, Judah, Vignes, Jp, Waite, Ian, Watanabe, Noriharu, Weiss, Lauren M., Wittrock, Justin, Zhou, George, Ziegler, Carl, and Zucker, Shay

Published
2024

12. Giant Outer Transiting Exoplanet Mass (GOT ’EM) Survey. III. Recovery and Confirmation of a Temperate, Mildly Eccentric, Single-transit Jupiter Orbiting TOI-2010

Author

Mann, Christopher R., primary, Dalba, Paul A., additional, Lafrenière, David, additional, Fulton, Benjamin J., additional, Hébrard, Guillaume, additional, Boisse, Isabelle, additional, Dalal, Shweta, additional, Deleuil, Magali, additional, Delfosse, Xavier, additional, Demangeon, Olivier, additional, Forveille, Thierry, additional, Heidari, Neda, additional, Kiefer, Flavien, additional, Martioli, Eder, additional, Moutou, Claire, additional, Endl, Michael, additional, Cochran, William D., additional, MacQueen, Phillip, additional, Marchis, Franck, additional, Dragomir, Diana, additional, Gupta, Arvind F., additional, Feliz, Dax L., additional, Nicholson, Belinda A., additional, Ziegler, Carl, additional, Villanueva, Steven, additional, Rowe, Jason, additional, Talens, Geert Jan, additional, Thorngren, Daniel, additional, LaCourse, Daryll, additional, Jacobs, Tom, additional, Howard, Andrew W., additional, Bieryla, Allyson, additional, Latham, David W., additional, Rabus, Markus, additional, Fetherolf, Tara, additional, Hellier, Coel, additional, Howell, Steve B., additional, Plavchan, Peter, additional, Reefe, Michael, additional, Combs, Deven, additional, Bowen, Michael, additional, Wittrock, Justin, additional, Ricker, George R., additional, Seager, S., additional, Winn, Joshua N., additional, Jenkins, Jon M., additional, Barclay, Thomas, additional, Watanabe, David, additional, Collins, Karen A., additional, Eastman, Jason D., additional, and Ting, Eric B., additional

Published
2023
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13. TOI-199 b: A Well-characterized 100 day Transiting Warm Giant Planet with TTVs Seen from Antarctica

Author

Hobson, Melissa J., primary, Trifonov, Trifon, additional, Henning, Thomas, additional, Jordán, Andrés, additional, Rojas, Felipe, additional, Espinoza, Nestor, additional, Brahm, Rafael, additional, Eberhardt, Jan, additional, Jones, Matías I., additional, Mekarnia, Djamel, additional, Kossakowski, Diana, additional, Schlecker, Martin, additional, Pinto, Marcelo Tala, additional, Torres Miranda, Pascal José, additional, Abe, Lyu, additional, Barkaoui, Khalid, additional, Bendjoya, Philippe, additional, Bouchy, François, additional, Buttu, Marco, additional, Carleo, Ilaria, additional, Collins, Karen A., additional, Colón, Knicole D., additional, Crouzet, Nicolas, additional, Dragomir, Diana, additional, Dransfield, Georgina, additional, Gasparetto, Thomas, additional, Goeke, Robert F., additional, Guillot, Tristan, additional, Günther, Maximilian N., additional, Howard, Saburo, additional, Jenkins, Jon M., additional, Korth, Judith, additional, Latham, David W., additional, Lendl, Monika, additional, Lissauer, Jack J., additional, Mann, Christopher R., additional, Mireles, Ismael, additional, Ricker, George R., additional, Saesen, Sophie, additional, Schwarz, Richard P., additional, Seager, S., additional, Sefako, Ramotholo, additional, Shporer, Avi, additional, Stockdale, Chris, additional, Suarez, Olga, additional, Tan, Thiam-Guan, additional, J. Triaud, Amaury H. M., additional, Ulmer-Moll, Solène, additional, Vanderspek, Roland, additional, Winn, Joshua N., additional, Wohler, Bill, additional, and Zhou, George, additional

Published
2023
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16. VaTEST. II. Statistical Validation of 11 TESS-detected Exoplanets Orbiting K-type Stars

Author

Mistry, Priyashkumar, primary, Pathak, Kamlesh, additional, Prasad, Aniket, additional, Lekkas, Georgios, additional, Bhattarai, Surendra, additional, Gharat, Sarvesh, additional, Maity, Mousam, additional, Kumar, Dhruv, additional, Collins, Karen A., additional, Schwarz, Richard P., additional, Mann, Christopher R., additional, Furlan, Elise, additional, Howell, Steve B., additional, Ciardi, David, additional, Bieryla, Allyson, additional, Matthews, Elisabeth C., additional, Gonzales, Erica, additional, Ziegler, Carl, additional, Crossfield, Ian, additional, Giacalone, Steven, additional, Tan, Thiam-Guan, additional, Evans, Phil, additional, Hełminiak, Krzysztof G., additional, Collins, Kevin I., additional, Narita, Norio, additional, Fukui, Akihiko, additional, Pozuelos, Francisco J., additional, Dressing, Courtney, additional, Soubkiou, Abderahmane, additional, Benkhaldoun, Zouhair, additional, Schlieder, Joshua E., additional, Suarez, Olga, additional, Barkaoui, Khalid, additional, Palle, Enric, additional, Murgas, Felipe, additional, Srdoc, Gregor, additional, Goliguzova, Maria V., additional, Strakhov, Ivan A., additional, Gnilka, Crystal, additional, Lester, Kathryn, additional, Littlefield, Colin, additional, Scott, Nic, additional, Matson, Rachel, additional, Gillon, Michaël, additional, Jehin, Emmanuel, additional, Timmermans, Mathilde, additional, Ghachoui, Mourad, additional, Abe, Lyu, additional, Bendjoya, Philippe, additional, Guillot, Tristan, additional, and Triaud, Amaury H. M. J., additional

Published
2023
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17. The TESS-Keck Survey. XI. Mass Measurements for Four Transiting Sub-Neptunes Orbiting K Dwarf TOI-1246

Author

Turtelboom, Emma, Weiss, Lauren M., Dressing, Courtney D., Nowak, Grzegorz, Palle, Enric, Beard, Corey, Blunt, Sarah, Brinkman, Casey, Chontos, Ashley, Claytor, Zachary R., Dai, Fei, Dalba, Paul A., Giacalone, Steven, Gonzales, Erica, Harada, Caleb K., Hill, Michelle L., Holcomb, Rae, Korth, Judith, Lubin, Jack, Masseron, Thomas, MacDougall, Mason, Mayo, Andrew W., Mocnik, Teo, Murphy, Joseph M. Akana, Polanski, Alex S., Rice, Malena, Rubenzahl, Ryan A., Scarsdale, Nicholas, Stassun, Keivan G., Tyler, Dakotah B., Van Zandt, Judah, Crossfield, Ian J. M., Deeg, Hans J., Fulton, Benjamin, Gandolfi, Davide, Howard, Andrew W., Huber, Dan, Isaacson, Howard, Kane, Stephen R., Lam, Kristine W. F., Luque, Rafael, Martin, Eduardo L., Morello, Giuseppe, Orell-Miquel, Jaume, Petigura, Erik A., Robertson, Paul, Roy, Arpita, Van Eylen, Vincent, Baker, David, Belinski, Alexander A., Bieryla, Allyson, Ciardi, David R., Collins, Karen A., Cutting, Neil, Della-Rose, Devin J., Ellingsen, Taylor B., Furlan, E., Gan, Tianjun, Gnilka, Crystal L., Guerra, Pere, Howell, Steve B., Jimenez, Mary, Latham, David W., Lariviere, Maude, Lester, Kathryn, Lillo-Box, Jorge, Luker, Lindy, Mann, Christopher R., Plavchan, Peter P., Safonov, Boris, Skinner, Brett, Strakhov, Ivan A., Wittrock, Justin M., Caldwell, Douglas A., Essack, Zahra, Jenkins, Jon M., Quintana, Elisa, Ricker, George R., Vanderspek, Roland, Seager, S., Winn, Joshua N., Turtelboom, Emma, Weiss, Lauren M., Dressing, Courtney D., Nowak, Grzegorz, Palle, Enric, Beard, Corey, Blunt, Sarah, Brinkman, Casey, Chontos, Ashley, Claytor, Zachary R., Dai, Fei, Dalba, Paul A., Giacalone, Steven, Gonzales, Erica, Harada, Caleb K., Hill, Michelle L., Holcomb, Rae, Korth, Judith, Lubin, Jack, Masseron, Thomas, MacDougall, Mason, Mayo, Andrew W., Mocnik, Teo, Murphy, Joseph M. Akana, Polanski, Alex S., Rice, Malena, Rubenzahl, Ryan A., Scarsdale, Nicholas, Stassun, Keivan G., Tyler, Dakotah B., Van Zandt, Judah, Crossfield, Ian J. M., Deeg, Hans J., Fulton, Benjamin, Gandolfi, Davide, Howard, Andrew W., Huber, Dan, Isaacson, Howard, Kane, Stephen R., Lam, Kristine W. F., Luque, Rafael, Martin, Eduardo L., Morello, Giuseppe, Orell-Miquel, Jaume, Petigura, Erik A., Robertson, Paul, Roy, Arpita, Van Eylen, Vincent, Baker, David, Belinski, Alexander A., Bieryla, Allyson, Ciardi, David R., Collins, Karen A., Cutting, Neil, Della-Rose, Devin J., Ellingsen, Taylor B., Furlan, E., Gan, Tianjun, Gnilka, Crystal L., Guerra, Pere, Howell, Steve B., Jimenez, Mary, Latham, David W., Lariviere, Maude, Lester, Kathryn, Lillo-Box, Jorge, Luker, Lindy, Mann, Christopher R., Plavchan, Peter P., Safonov, Boris, Skinner, Brett, Strakhov, Ivan A., Wittrock, Justin M., Caldwell, Douglas A., Essack, Zahra, Jenkins, Jon M., Quintana, Elisa, Ricker, George R., Vanderspek, Roland, Seager, S., and Winn, Joshua N.

Abstract

Multiplanet systems are valuable arenas for investigating exoplanet architectures and comparing planetary siblings. TOI-1246 is one such system, with a moderately bright K dwarf (V = 11.6, K = 9.9) and four transiting sub-Neptunes identified by TESS with orbital periods of 4.31, 5.90, 18.66, and 37.92 days. We collected 130 radial velocity observations with Keck/HIRES and TNG/HARPS-N to measure planet masses. We refit the 14 sectors of TESS photometry to refine planet radii (2.97 +/- 0.06 R (circle plus), 2.47 +/- 0.08 R (circle plus), 3.46 +/- 0.09 R (circle plus), and 3.72 +/- 0.16 R (circle plus)) and confirm the four planets. We find that TOI-1246 e is substantially more massive than the three inner planets (8.1 +/- 1.1 M (circle plus), 8.8 +/- 1.2 M (circle plus), 5.3 +/- 1.7 M (circle plus), and 14.8 +/- 2.3 M (circle plus)). The two outer planets, TOI-1246 d and TOI-1246 e, lie near to the 2:1 resonance (P (e)/P ( d ) = 2.03) and exhibit transit-timing variations. TOI-1246 is one of the brightest four-planet systems, making it amenable for continued observations. It is one of only five systems with measured masses and radii for all four transiting planets. The planet densities range from 0.70 +/- 0.24 to 3.21 +/- 0.44 g cm(-3), implying a range of bulk and atmospheric compositions. We also report a fifth planet candidate found in the RV data with a minimum mass of 25.6 +/- 3.6 M (circle plus). This planet candidate is exterior to TOI-1246 e, with a candidate period of 93.8 days, and we discuss the implications if it is confirmed to be planetary in nature.

Published
2022

18. The TESS-Keck Survey. XI. Mass Measurements for Four Transiting Sub-Neptunes Orbiting K Dwarf TOI–1246

Author

Turtelboom, Emma V., primary, Weiss, Lauren M., additional, Dressing, Courtney D., additional, Nowak, Grzegorz, additional, Pallé, Enric, additional, Beard, Corey, additional, Blunt, Sarah, additional, Brinkman, Casey, additional, Chontos, Ashley, additional, Claytor, Zachary R., additional, Dai, Fei, additional, Dalba, Paul A., additional, Giacalone, Steven, additional, Gonzales, Erica, additional, Harada, Caleb K., additional, Hill, Michelle L., additional, Holcomb, Rae, additional, Korth, Judith, additional, Lubin, Jack, additional, Masseron, Thomas, additional, MacDougall, Mason, additional, Mayo, Andrew W., additional, Močnik, Teo, additional, Akana Murphy, Joseph M., additional, Polanski, Alex S., additional, Rice, Malena, additional, Rubenzahl, Ryan A., additional, Scarsdale, Nicholas, additional, Stassun, Keivan G., additional, Tyler, Dakotah B., additional, Zandt, Judah Van, additional, Crossfield, Ian J. M., additional, Deeg, Hans J., additional, Fulton, Benjamin, additional, Gandolfi, Davide, additional, Howard, Andrew W., additional, Huber, Dan, additional, Isaacson, Howard, additional, Kane, Stephen R., additional, Lam, Kristine W. F., additional, Luque, Rafael, additional, Martín, Eduardo L., additional, Morello, Giuseppe, additional, Orell-Miquel, Jaume, additional, Petigura, Erik A., additional, Robertson, Paul, additional, Roy, Arpita, additional, Van Eylen, Vincent, additional, Baker, David, additional, Belinski, Alexander A., additional, Bieryla, Allyson, additional, Ciardi, David R., additional, Collins, Karen A., additional, Cutting, Neil, additional, Della-Rose, Devin J., additional, Ellingsen, Taylor B., additional, Furlan, E., additional, Gan, Tianjun, additional, Gnilka, Crystal L., additional, Guerra, Pere, additional, Howell, Steve B., additional, Jimenez, Mary, additional, Latham, David W., additional, Larivière, Maude, additional, Lester, Kathryn V., additional, Lillo-Box, Jorge, additional, Luker, Lindy, additional, Mann, Christopher R., additional, Plavchan, Peter P., additional, Safonov, Boris, additional, Skinner, Brett, additional, Strakhov, Ivan A., additional, Wittrock, Justin M., additional, Caldwell, Douglas A., additional, Essack, Zahra, additional, Jenkins, Jon M., additional, Quintana, Elisa V., additional, Ricker, George R., additional, Vanderspek, Roland, additional, Seager, S., additional, and Winn, Joshua N., additional

Published
2022
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19. The TESS-Keck Survey. VIII. Confirmation of a Transiting Giant Planet on an Eccentric 261 Day Orbit with the Automated Planet Finder Telescope*

Author

Dalba, Paul A., primary, Kane, Stephen R., additional, Dragomir, Diana, additional, Villanueva, Steven, additional, Collins, Karen A., additional, Jacobs, Thomas Lee, additional, LaCourse, Daryll M., additional, Gagliano, Robert, additional, Kristiansen, Martti H., additional, Omohundro, Mark, additional, Schwengeler, Hans M., additional, Terentev, Ivan A., additional, Vanderburg, Andrew, additional, Fulton, Benjamin, additional, Isaacson, Howard, additional, Van Zandt, Judah, additional, Howard, Andrew W., additional, Thorngren, Daniel P., additional, Howell, Steve B., additional, Batalha, Natalie M., additional, Chontos, Ashley, additional, Crossfield, Ian J. M., additional, Dressing, Courtney D., additional, Huber, Daniel, additional, Petigura, Erik A., additional, Robertson, Paul, additional, Roy, Arpita, additional, Weiss, Lauren M., additional, Behmard, Aida, additional, Beard, Corey, additional, Brinkman, Casey L., additional, Giacalone, Steven, additional, Hill, Michelle L., additional, Lubin, Jack, additional, Mayo, Andrew W., additional, Močnik, Teo, additional, Akana Murphy, Joseph M., additional, Polanski, Alex S., additional, Rice, Malena, additional, Rosenthal, Lee J., additional, Rubenzahl, Ryan A., additional, Scarsdale, Nicholas, additional, Turtelboom, Emma V., additional, Tyler, Dakotah, additional, Benni, Paul, additional, Boyce, Pat, additional, Esposito, Thomas M., additional, Girardin, E., additional, Laloum, Didier, additional, Lewin, Pablo, additional, Mann, Christopher R., additional, Marchis, Franck, additional, Schwarz, Richard P., additional, Srdoc, Gregor, additional, Steuer, Jana, additional, Sivarani, Thirupathi, additional, Unni, Athira, additional, Eisner, Nora L., additional, Fetherolf, Tara, additional, Li, Zhexing, additional, Yao, Xinyu, additional, Pepper, Joshua, additional, Ricker, George R., additional, Vanderspek, Roland, additional, Latham, David W., additional, Seager, S., additional, Winn, Joshua N., additional, Jenkins, Jon M., additional, Burke, Christopher J., additional, Eastman, Jason D., additional, Lund, Michael B., additional, Rodriguez, David R., additional, Rowden, Pamela, additional, Ting, Eric B., additional, and Villaseñor, Jesus Noel, additional

Published
2022
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25. A Queueing Approach to Optimal Resource Replication in Wireless Sensor Networks

Author

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH DEPT OF ELECTRICAL AND COMPUTER ENGINEERING, Mann, Christopher R., Baldwin, Rusty O., Kharoufeh, Jeffrey P., Mullins, Barry E., AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH DEPT OF ELECTRICAL AND COMPUTER ENGINEERING, Mann, Christopher R., Baldwin, Rusty O., Kharoufeh, Jeffrey P., and Mullins, Barry E.

Abstract

We develop a queueing model for analyzing resource replication strategies in wireless sensor networks. The model can be used to minimize either the total transmission rate of the network (an energy-centric approach) or to ensure the proportion of query failures does not exceed a predetermined threshold (a failure-centric approach). The model explicitly considers the limited availability of network resources, as well as the frequency of resource requests and query deadlines, to determine the optimal replication strategy for a network resource. While insufficient resource replication increases query failures and transmission rates, replication levels beyond the optimum result in only marginal decreases in the proportion of query failures at a cost of higher total energy expenditure and network traffic., Preprint. Published in Performance Evaluation, v65 n10 p689-700, 2008. The original document contains color images.

Published
2009

26. A Trajectory-Based Selective Broadcast Query Protocol for Large-Scale, High-Density Wireless Sensor Networks

Author

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH DEPT OF ELECTRICAL AND COMPUTER ENGINEERING, Mann, Christopher R, Baldwin, Rusty O, Kharoufeh, Jeffrey P, Mullins, Barry E, AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH DEPT OF ELECTRICAL AND COMPUTER ENGINEERING, Mann, Christopher R, Baldwin, Rusty O, Kharoufeh, Jeffrey P, and Mullins, Barry E

Abstract

We present a small-footprint search protocol designed to facilitate any-type queries for data content and services in large population, high-density wireless sensor networks. Our protocol, termed Trajectory-based Selective Broadcast Query (TSBQ), works in conjunction with time division multiple access- or schedule-based medium access control protocols to reduce per-query energy expenditure. We compare the performance of TSBQ to unicastand local broadcast-based search algorithms and also determine a critical node density based on the energy expended by nodes to transmit and receive. Minimal energy expenditure is achieved by determining the optimal number of data/service replicates and the number of nodes designated to receive each query transmission. Numerical results indicate that TSBQ significantly reduces the total energy expenditure of a network as compared to unicast and local broadcast-based search protocols., Published in Telecommunication Systems, v35 p67-86, 2007.

Published
2007

27. Energy-Efficient Querying of Wireless Sensor Networks

Author

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT, Mann, Christopher R., AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT, and Mann, Christopher R.

Abstract

Due to the distributed nature of information collection in wireless sensor networks and the inherent limitations of the component devices, the ability to store, locate, and retrieve data and services with minimum energy expenditure is a critical network function. Additionally, effective search protocols must scale efficiently and consume a minimum of network energy and memory reserves. A novel search protocol, the Trajectory-based Selective Broadcast Query protocol, is proposed. An analytical model of the protocol is derived, and an optimization model is formulated. Based on the results of analysis and simulation, the protocol is shown to reduce the expected total network energy expenditure by 45.5 percent to 75 percent compared to current methods. This research also derives an enhanced analytical node model of random walk search protocols for networks with limited-lifetime resources and time-constrained queries. An optimization program is developed to minimize the expected total energy expenditure while simultaneously ensuring the proportion of failed queries does not exceed a specified threshold. Finally, the ability of the analytical node model to predict the performance of random walk search protocols in large-population networks is established through extensive simulation experiments. It is shown that the model provides a reliable estimate of optimum search algorithm parameters.

Published
2007

31. Development of Financial Plans for Regional Transportation Plans - Methods, Data and Issues

Author

Southeast Michigan Council of Governments, Mann, Christopher R., Johnson, Kevin Andrew, Tumidanski, Jeff, Southeast Michigan Council of Governments, Mann, Christopher R., Johnson, Kevin Andrew, and Tumidanski, Jeff

Abstract

This paper focuses on the portion of the Financial Plan for the Regional Transportation Plan (RTP) dealing with the road system in Southeast Michigan Council of Governments (SEMCOG) metropolitan planning region under the jurisdiction of county road agencies, cities, villages and the Michigan Department of Transportation (MDOT). The Intermodal Surface Transportation Efficiency Act of 1991 requires that projects identified in a region's long range plan be financially constrained. SEMCOG, developed a plan that not only met the ISTEA requirements and served the needs of its member communities, but that also was consistent and comparable with forecasts developed by the state's other urban areas and with the state plan developed by the Michigan Department of Transportation (MDOT). This paper discusses the methods and the scope of data collection and the many issues faced in preparing the financial plan. A brief description of the outcome of the financial planning process is also included. 12p.

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