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Your search keyword '"Lloyd, James P."' showing total 36 results
Start Over Author "Lloyd, James P." Publisher american astronomical society
36 results on '"Lloyd, James P."'

1. The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems. V. Do Self-consistent Atmospheric Models Represent JWST Spectra? A Showcase with VHS 1256–1257 b

Author

Petrus, Simon, primary, Whiteford, Niall, additional, Patapis, Polychronis, additional, Biller, Beth A., additional, Skemer, Andrew, additional, Hinkley, Sasha, additional, Suárez, Genaro, additional, Palma-Bifani, Paulina, additional, Morley, Caroline V., additional, Tremblin, Pascal, additional, Charnay, Benjamin, additional, Vos, Johanna M., additional, Wang, Jason J., additional, Stone, Jordan M., additional, Bonnefoy, Mickaël, additional, Chauvin, Gaël, additional, Miles, Brittany E., additional, Carter, Aarynn L., additional, Lueber, Anna, additional, Helling, Christiane, additional, Sutlieff, Ben J., additional, Janson, Markus, additional, Gonzales, Eileen C., additional, Hoch, Kielan K. W., additional, Absil, Olivier, additional, Balmer, William O., additional, Boccaletti, Anthony, additional, Bonavita, Mariangela, additional, Booth, Mark, additional, Bowler, Brendan P., additional, Briesemeister, Zackery W., additional, Bryan, Marta L., additional, Calissendorff, Per, additional, Cantalloube, Faustine, additional, Chen, Christine H., additional, Choquet, Elodie, additional, Christiaens, Valentin, additional, Cugno, Gabriele, additional, Currie, Thayne, additional, Danielski, Camilla, additional, De Furio, Matthew, additional, Dupuy, Trent J., additional, Factor, Samuel M., additional, Faherty, Jacqueline K., additional, Fitzgerald, Michael P., additional, Fortney, Jonathan J., additional, Franson, Kyle, additional, Girard, Julien H., additional, Grady, Carol A., additional, Henning, Thomas, additional, Hines, Dean C., additional, Hood, Callie E., additional, Howe, Alex R., additional, Kalas, Paul, additional, Kammerer, Jens, additional, Kennedy, Grant M., additional, Kenworthy, Matthew A., additional, Kervella, Pierre, additional, Kim, Minjae, additional, Kitzmann, Daniel, additional, Kraus, Adam L., additional, Kuzuhara, Masayuki, additional, Lagage, Pierre-Olivier, additional, Lagrange, Anne-Marie, additional, Lawson, Kellen, additional, Lazzoni, Cecilia, additional, Leisenring, Jarron M., additional, Lew, Ben W. P., additional, Liu, Michael C., additional, Liu, Pengyu, additional, Llop-Sayson, Jorge, additional, Lloyd, James P., additional, Macintosh, Bruce, additional, Mâlin, Mathilde, additional, Manjavacas, Elena, additional, Marino, Sebastián, additional, Marley, Mark S., additional, Marois, Christian, additional, Martinez, Raquel A., additional, Matthews, Elisabeth C., additional, Matthews, Brenda C., additional, Mawet, Dimitri, additional, Mazoyer, Johan, additional, McElwain, Michael W., additional, Metchev, Stanimir, additional, Meyer, Michael R., additional, Millar-Blanchaer, Maxwell A., additional, Mollière, Paul, additional, Moran, Sarah E., additional, Mukherjee, Sagnick, additional, Pantin, Eric, additional, Perrin, Marshall D., additional, Pueyo, Laurent, additional, Quanz, Sascha P., additional, Quirrenbach, Andreas, additional, Ray, Shrishmoy, additional, Rebollido, Isabel, additional, Adams Redai, Jea, additional, Ren, Bin B., additional, Rickman, Emily, additional, Sallum, Steph, additional, Samland, Matthias, additional, Sargent, Benjamin, additional, Schlieder, Joshua E., additional, Stapelfeldt, Karl R., additional, Tamura, Motohide, additional, Tan, Xianyu, additional, Theissen, Christopher A., additional, Uyama, Taichi, additional, Vasist, Malavika, additional, Vigan, Arthur, additional, Wagner, Kevin, additional, Ward-Duong, Kimberly, additional, Wolff, Schuyler G., additional, Worthen, Kadin, additional, Wyatt, Mark C., additional, Ygouf, Marie, additional, Zurlo, Alice, additional, Zhang, Xi, additional, Zhang, Keming, additional, Zhang, Zhoujian, additional, and Zhou, Yifan, additional

Published
2024
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2. The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems I: High-contrast Imaging of the Exoplanet HIP 65426 b from 2 to 16 μm

Author

Carter, Aarynn L., primary, Hinkley, Sasha, additional, Kammerer, Jens, additional, Skemer, Andrew, additional, Biller, Beth A., additional, Leisenring, Jarron M., additional, Millar-Blanchaer, Maxwell A., additional, Petrus, Simon, additional, Stone, Jordan M., additional, Ward-Duong, Kimberly, additional, Wang, Jason J., additional, Girard, Julien H., additional, Hines, Dean C., additional, Perrin, Marshall D., additional, Pueyo, Laurent, additional, Balmer, William O., additional, Bonavita, Mariangela, additional, Bonnefoy, Mickael, additional, Chauvin, Gael, additional, Choquet, Elodie, additional, Christiaens, Valentin, additional, Danielski, Camilla, additional, Kennedy, Grant M., additional, Matthews, Elisabeth C., additional, Miles, Brittany E., additional, Patapis, Polychronis, additional, Ray, Shrishmoy, additional, Rickman, Emily, additional, Sallum, Steph, additional, Stapelfeldt, Karl R., additional, Whiteford, Niall, additional, Zhou, Yifan, additional, Absil, Olivier, additional, Boccaletti, Anthony, additional, Booth, Mark, additional, Bowler, Brendan P., additional, Chen, Christine H., additional, Currie, Thayne, additional, Fortney, Jonathan J., additional, Grady, Carol A., additional, Greebaum, Alexandra Z., additional, Henning, Thomas, additional, Hoch, Kielan K. W., additional, Janson, Markus, additional, Kalas, Paul, additional, Kenworthy, Matthew A., additional, Kervella, Pierre, additional, Kraus, Adam L., additional, Lagage, Pierre-Olivier, additional, Liu, Michael C., additional, Macintosh, Bruce, additional, Marino, Sebastian, additional, Marley, Mark S., additional, Marois, Christian, additional, Matthews, Brenda C., additional, Mawet, Dimitri, additional, McElwain, Michael W., additional, Metchev, Stanimir, additional, Meyer, Michael R., additional, Molliere, Paul, additional, Moran, Sarah E., additional, Morley, Caroline V., additional, Mukherjee, Sagnick, additional, Pantin, Eric, additional, Quirrenbach, Andreas, additional, Rebollido, Isabel, additional, Ren, Bin B., additional, Schneider, Glenn, additional, Vasist, Malavika, additional, Worthen, Kadin, additional, Wyatt, Mark C., additional, Briesemeister, Zackery W., additional, Bryan, Marta L., additional, Calissendorff, Per, additional, Cantalloube, Faustine, additional, Cugno, Gabriele, additional, De Furio, Matthew, additional, Dupuy, Trent J., additional, Factor, Samuel M., additional, Faherty, Jacqueline K., additional, Fitzgerald, Michael P., additional, Franson, Kyle, additional, Gonzales, Eileen C., additional, Hood, Callie E., additional, Howe, Alex R., additional, Kuzuhara, Masayuki, additional, Lagrange, Anne-Marie, additional, Lawson, Kellen, additional, Lazzoni, Cecilia, additional, Lew, Ben W. P., additional, Liu, Pengyu, additional, Llop-Sayson, Jorge, additional, Lloyd, James P., additional, Martinez, Raquel A., additional, Mazoyer, Johan, additional, Palma-Bifani, Paulina, additional, Quanz, Sascha P., additional, Redai, Jea Adams, additional, Samland, Matthias, additional, Schlieder, Joshua E., additional, Tamura, Motohide, additional, Tan, Xianyu, additional, Uyama, Taichi, additional, Vigan, Arthur, additional, Vos, Johanna M., additional, Wagner, Kevin, additional, Wolff, Schuyler G., additional, Ygouf, Marie, additional, Zhang, Xi, additional, Zhang, Keming, additional, and Zhang, Zhoujian, additional

Published
2023
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3. The JWST Early-release Science Program for Direct Observations of Exoplanetary Systems II: A 1 to 20 μm Spectrum of the Planetary-mass Companion VHS 1256–1257 b

Author

Miles, Brittany E., primary, Biller, Beth A., additional, Patapis, Polychronis, additional, Worthen, Kadin, additional, Rickman, Emily, additional, Hoch, Kielan K. W., additional, Skemer, Andrew, additional, Perrin, Marshall D., additional, Whiteford, Niall, additional, Chen, Christine H., additional, Sargent, B., additional, Mukherjee, Sagnick, additional, Morley, Caroline V., additional, Moran, Sarah E., additional, Bonnefoy, Mickael, additional, Petrus, Simon, additional, Carter, Aarynn L., additional, Choquet, Elodie, additional, Hinkley, Sasha, additional, Ward-Duong, Kimberly, additional, Leisenring, Jarron M., additional, Millar-Blanchaer, Maxwell A., additional, Pueyo, Laurent, additional, Ray, Shrishmoy, additional, Sallum, Steph, additional, Stapelfeldt, Karl R., additional, Stone, Jordan M., additional, Wang, Jason J., additional, Absil, Olivier, additional, Balmer, William O., additional, Boccaletti, Anthony, additional, Bonavita, Mariangela, additional, Booth, Mark, additional, Bowler, Brendan P., additional, Chauvin, Gael, additional, Christiaens, Valentin, additional, Currie, Thayne, additional, Danielski, Camilla, additional, Fortney, Jonathan J., additional, Girard, Julien H., additional, Grady, Carol A., additional, Greenbaum, Alexandra Z., additional, Henning, Thomas, additional, Hines, Dean C., additional, Janson, Markus, additional, Kalas, Paul, additional, Kammerer, Jens, additional, Kennedy, Grant M., additional, Kenworthy, Matthew A., additional, Kervella, Pierre, additional, Lagage, Pierre-Olivier, additional, Lew, Ben W. P., additional, Liu, Michael C., additional, Macintosh, Bruce, additional, Marino, Sebastian, additional, Marley, Mark S., additional, Marois, Christian, additional, Matthews, Elisabeth C., additional, Matthews, Brenda C., additional, Mawet, Dimitri, additional, McElwain, Michael W., additional, Metchev, Stanimir, additional, Meyer, Michael R., additional, Molliere, Paul, additional, Pantin, Eric, additional, Quirrenbach, Andreas, additional, Rebollido, Isabel, additional, Ren, Bin B., additional, Schneider, Glenn, additional, Vasist, Malavika, additional, Wyatt, Mark C., additional, Zhou, Yifan, additional, Briesemeister, Zackery W., additional, Bryan, Marta L, additional, Calissendorff, Per, additional, Cantalloube, Faustine, additional, Cugno, Gabriele, additional, De Furio, Matthew, additional, Dupuy, Trent J., additional, Factor, Samuel M., additional, Faherty, Jacqueline K., additional, Fitzgerald, Michael P., additional, Franson, Kyle, additional, Gonzales, Eileen C., additional, Hood, Callie E., additional, Howe, Alex R., additional, Kraus, Adam L., additional, Kuzuhara, Masayuki, additional, Lagrange, Anne-Marie, additional, Lawson, Kellen, additional, Lazzoni, Cecilia, additional, Liu, Pengyu, additional, Llop-Sayson, Jorge, additional, Lloyd, James P., additional, Martinez, Raquel A., additional, Mazoyer, Johan, additional, Quanz, Sascha P., additional, Redai, Jea Adams, additional, Samland, Matthias, additional, Schlieder, Joshua E., additional, Tamura, Motohide, additional, Tan, Xianyu, additional, Uyama, Taichi, additional, Vigan, Arthur, additional, Vos, Johanna M., additional, Wagner, Kevin, additional, Wolff, Schuyler G., additional, Ygouf, Marie, additional, Zhang, Xi, additional, Zhang, Keming, additional, and Zhang, Zhoujian, additional

Published
2023
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4. Metallicity and Temperature Indicators in M Dwarf K-band Spectra: Testing New and Updated Calibrations with Observations of 133 Solar Neighborhood M Dwarfs

Author

Rojas-Ayala, Bárbara, Covey, Kevin R., Muirhead, Philip S., and Lloyd, James P.

Subjects
Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

We present K-band spectra for 133 nearby (d < 33 ps) M dwarfs, including 18 M dwarfs with reliable metallicity estimates (as inferred from an FGK type companion), 11 M dwarf planet hosts, more than 2/3 of the M dwarfs in the northern 8 pc sample, and several M dwarfs from the LSPM catalog. From these spectra, we measure equivalent widths of the Ca and Na lines, and a spectral index quantifying the absorption due to H_2O opacity (the H_2O-K_2 index). Using empirical spectral type standards and synthetic models, we calibrate the H_2O-K_2 index as an indicator of an M dwarf's spectral type and effective temperature. We also present a revised relationship that estimates the [Fe/H] and [M/H] metallicities of M dwarfs from their Na I, Ca I, and H_2O-K_2 measurements. Comparisons to model atmosphere provide a qualitative validation of our approach, but also reveal an overall offset between the atomic line strengths predicted by models as compared to actual observations. Our metallicity estimates also reproduce expected correlations with Galactic space motions and Hα emission line strengths, and return statistically identical metallicities for M dwarfs within a common multiple system. Finally, we find systematic residuals between our H_2O-based spectral types and those derived from optical spectral features with previously known sensitivity to stellar metallicity, such as TiO, and identify the CaH1 index as a promising optical index for diagnosing the metallicities of near-solar M dwarfs.

Published
2012

5. CHARACTERIZING THE COOL KOIs. VI. H - AND K -BAND SPECTRA OF KEPLER M DWARF PLANET-CANDIDATE HOSTS

Author

Muirhead, Philip S., primary, Becker, Juliette, additional, Feiden, Gregory A., additional, Rojas-Ayala, Bárbara, additional, Vanderburg, Andrew, additional, Price, Ellen M., additional, Thorp, Rachel, additional, Law, Nicholas M., additional, Riddle, Reed, additional, Baranec, Christoph, additional, Hamren, Katherine, additional, Schlawin, Everett, additional, Covey, Kevin R., additional, Johnson, John Asher, additional, and Lloyd, James P., additional

Published
2014
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8. CHARACTERIZING THE COOL KOIs. V. KOI-256: A MUTUALLY ECLIPSING POST-COMMON ENVELOPE BINARY

Author

Muirhead, Philip S., primary, Vanderburg, Andrew, additional, Shporer, Avi, additional, Becker, Juliette, additional, Swift, Jonathan J., additional, Lloyd, James P., additional, Fuller, Jim, additional, Zhao, Ming, additional, Hinkley, Sasha, additional, Pineda, J. Sebastian, additional, Bottom, Michael, additional, Howard, Andrew W., additional, von Braun, Kaspar, additional, Boyajian, Tabetha S., additional, Law, Nicholas, additional, Baranec, Christoph, additional, Riddle, Reed, additional, Ramaprakash, A. N., additional, Tendulkar, Shriharsh P., additional, Bui, Khanh, additional, Burse, Mahesh, additional, Chordia, Pravin, additional, Das, Hillol, additional, Dekany, Richard, additional, Punnadi, Sujit, additional, and Johnson, John Asher, additional

Published
2013
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9. Precision masses of the low-mass binary system GJ 623

Author

Martinache, Frantz, Lloyd, James P., Ireland, Michael J., Yamada, Ryan S., Tuthill, Peter G., Martinache, Frantz, Lloyd, James P., Ireland, Michael J., Yamada, Ryan S., and Tuthill, Peter G.

Abstract

We have used aperture masking interferometry and adaptive optics (AO) at the Palomar 200 inch telescope to obtain precise mass measurements of the binary M dwarf GJ 623. AO observations spread over 3 yr combined with a decade of radial velocity measurements constrain all orbital parameters of the GJ 623 binary system accurately enough to critically challenge the models. The dynamical masses measured are m(1) = 0.371 ± 0.015 M☉ (4%) and m(2) = 0.115 ± 0.0023 M☉ (2%) for the primary and the secondary, respectively. Models are not consistent with color and mass, requiring very low metallicities.

Published
2007

13. CHARACTERIZING THE COOL KOIs. III. KOI 961: A SMALL STAR WITH LARGE PROPER MOTION AND THREE SMALL PLANETS

Author

Muirhead, Philip S., primary, Johnson, John Asher, additional, Apps, Kevin, additional, Carter, Joshua A., additional, Morton, Timothy D., additional, Fabrycky, Daniel C., additional, Pineda, John Sebastian, additional, Bottom, Michael, additional, Rojas-Ayala, Bárbara, additional, Schlawin, Everett, additional, Hamren, Katherine, additional, Covey, Kevin R., additional, Crepp, Justin R., additional, Stassun, Keivan G., additional, Pepper, Joshua, additional, Hebb, Leslie, additional, Kirby, Evan N., additional, Howard, Andrew W., additional, Isaacson, Howard T., additional, Marcy, Geoffrey W., additional, Levitan, David, additional, Diaz-Santos, Tanio, additional, Armus, Lee, additional, and Lloyd, James P., additional

Published
2012
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15. ESTABLISHING α Oph AS A PROTOTYPE ROTATOR: IMPROVED ASTROMETRIC ORBIT

Author

Hinkley, Sasha, primary, Monnier, John D., additional, Oppenheimer, Ben R., additional, Roberts, Lewis C., additional, Ireland, Michael, additional, Zimmerman, Neil, additional, Brenner, Douglas, additional, Parry, Ian R., additional, Martinache, Frantz, additional, Lai, Olivier, additional, Soummer, Rémi, additional, Sivaramakrishnan, Anand, additional, Beichman, Charles, additional, Hillenbrand, Lynne, additional, Zhao, Ming, additional, Lloyd, James P., additional, Bernat, David, additional, Vasisht, Gautam, additional, Crepp, Justin R., additional, Pueyo, Laurent, additional, Shao, Michael, additional, Perrin, Marshall D., additional, King, David L., additional, Bouchez, Antonin, additional, Roberts, Jennifer E., additional, Dekany, Richard, additional, and Burruss, Rick, additional

Published
2010
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17. THE LYOT PROJECT DIRECT IMAGING SURVEY OF SUBSTELLAR COMPANIONS: STATISTICAL ANALYSIS AND INFORMATION FROM NONDETECTIONS

Author

Leconte, Jérémy, primary, Soummer, Rémi, additional, Hinkley, Sasha, additional, Oppenheimer, Ben R., additional, Sivaramakrishnan, Anand, additional, Brenner, Douglas, additional, Kuhn, Jeffrey, additional, Lloyd, James P., additional, Perrin, Marshall D., additional, Makidon, Russell, additional, Roberts, Lewis C., additional, Graham, James R., additional, Simon, Michal, additional, Brown, Robert A., additional, Zimmerman, Neil, additional, Chabrier, Gilles, additional, and Baraffe, Isabelle, additional

Published
2010
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18. A CLOSE COMPANION SEARCH AROUND L DWARFS USING APERTURE MASKING INTERFEROMETRY AND PALOMAR LASER GUIDE STAR ADAPTIVE OPTICS

Author

Bernat, David, primary, Bouchez, Antonin H., additional, Ireland, Michael, additional, Tuthill, Peter, additional, Martinache, Frantz, additional, Angione, John, additional, Burruss, Rick S., additional, Cromer, John L., additional, Dekany, Richard G., additional, Guiwits, Stephen R., additional, Henning, John R., additional, Hickey, Jeff, additional, Kibblewhite, Edward, additional, McKenna, Daniel L., additional, Moore, Anna M., additional, Petrie, Harold L., additional, Roberts, Jennifer, additional, Shelton, J. Chris, additional, Thicksten, Robert P., additional, Trinh, Thang, additional, Tripathi, Renu, additional, Troy, Mitchell, additional, Truong, Tuan, additional, Velur, Viswa, additional, and Lloyd, James P., additional

Published
2010
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19. DISCOVERY AND CHARACTERIZATION OF A FAINT STELLAR COMPANION TO THE A3V STAR ζ VIRGINIS

Author

Hinkley, Sasha, primary, Oppenheimer, Ben R., additional, Brenner, Douglas, additional, Zimmerman, Neil, additional, Roberts, Lewis C., additional, Parry, Ian R., additional, Soummer, Rémi, additional, Sivaramakrishnan, Anand, additional, Simon, Michal, additional, Perrin, Marshall D., additional, King, David L., additional, Lloyd, James P., additional, Bouchez, Antonin, additional, Roberts, Jennifer E., additional, Dekany, Richard, additional, Beichman, Charles, additional, Hillenbrand, Lynne, additional, Burruss, Rick, additional, Shao, Michael, additional, and Vasisht, Gautam, additional

Published
2010
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22. The Solar‐System‐Scale Disk around AB Aurigae

Author

Oppenheimer, Ben R., primary, Brenner, Douglas, additional, Hinkley, Sasha, additional, Zimmerman, Neil, additional, Sivaramakrishnan, Anand, additional, Soummer, Remi, additional, Kuhn, Jeffrey, additional, Graham, James R., additional, Perrin, Marshall, additional, Lloyd, James P., additional, Roberts, Jr., Lewis C., additional, and Harrington, David M., additional

Published
2008
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26. The Challenges of Coronagraphic Astrometry

Author

Digby, Andrew P., primary, Hinkley, Sasha, additional, Oppenheimer, Ben. R., additional, Sivaramakrishnan, Anand, additional, Lloyd, James P., additional, Perrin, Marshall D., additional, Roberts, Jr., Lewis C., additional, Soummer, Remi, additional, Brenner, Douglas, additional, Makidon, Russell B., additional, Shara, Michael, additional, Kuhn, Jeffrey, additional, Graham, James, additional, Kalas, Paul, additional, and Newburgh, Laura, additional

Published
2006
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