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Your search keyword '"Motalebi, Fatemeh"' showing total 10 results
Start Over Author "Motalebi, Fatemeh" Publisher american astronomical society
10 results on '"Motalebi, Fatemeh"'

1. Three’s Company: An Additional Non-transiting Super-Earth in the Bright HD 3167 System, and Masses for All Three Planets

Author

Christiansen, Jessie L., primary, Vanderburg, Andrew, additional, Burt, Jennifer, additional, Fulton, B. J., additional, Batygin, Konstantin, additional, Benneke, Björn, additional, Brewer, John M., additional, Charbonneau, David, additional, Ciardi, David R., additional, Cameron, Andrew Collier, additional, Coughlin, Jeffrey L., additional, Crossfield, Ian J. M., additional, Dressing, Courtney, additional, Greene, Thomas P., additional, Howard, Andrew W., additional, Latham, David W., additional, Molinari, Emilio, additional, Mortier, Annelies, additional, Mullally, Fergal, additional, Pepe, Francesco, additional, Rice, Ken, additional, Sinukoff, Evan, additional, Sozzetti, Alessandro, additional, Thompson, Susan E., additional, Udry, Stéphane, additional, Vogt, Steven S., additional, Barman, Travis S., additional, Batalha, Natasha E., additional, Bouchy, François, additional, Buchhave, Lars A., additional, Butler, R. Paul, additional, Cosentino, Rosario, additional, Dupuy, Trent J., additional, Ehrenreich, David, additional, Fiorenzano, Aldo, additional, Hansen, Brad M. S., additional, Henning, Thomas, additional, Hirsch, Lea, additional, Holden, Bradford P., additional, Isaacson, Howard T., additional, Johnson, John A., additional, Knutson, Heather A., additional, Kosiarek, Molly, additional, López-Morales, Mercedes, additional, Lovis, Christophe, additional, Malavolta, Luca, additional, Mayor, Michel, additional, Micela, Giuseppina, additional, Motalebi, Fatemeh, additional, Petigura, Erik, additional, Phillips, David F., additional, Piotto, Giampaolo, additional, Rogers, Leslie A., additional, Sasselov, Dimitar, additional, Schlieder, Joshua E., additional, Ségransan, Damien, additional, Watson, Christopher A., additional, and Weiss, Lauren M., additional

Published
2017
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2. The Kepler-19 System: A Thick-envelope Super-Earth with Two Neptune-mass Companions Characterized Using Radial Velocities and Transit Timing Variations

Author

Malavolta, Luca, primary, Borsato, Luca, additional, Granata, Valentina, additional, Piotto, Giampaolo, additional, Lopez, Eric, additional, Vanderburg, Andrew, additional, Figueira, Pedro, additional, Mortier, Annelies, additional, Nascimbeni, Valerio, additional, Affer, Laura, additional, Bonomo, Aldo S., additional, Bouchy, Francois, additional, Buchhave, Lars A., additional, Charbonneau, David, additional, Cameron, Andrew Collier, additional, Cosentino, Rosario, additional, Dressing, Courtney D., additional, Dumusque, Xavier, additional, Fiorenzano, Aldo F. M., additional, Harutyunyan, Avet, additional, Haywood, Raphaëlle D., additional, Johnson, John Asher, additional, Latham, David W., additional, Lopez-Morales, Mercedes, additional, Lovis, Christophe, additional, Mayor, Michel, additional, Micela, Giusi, additional, Molinari, Emilio, additional, Motalebi, Fatemeh, additional, Pepe, Francesco, additional, Phillips, David F., additional, Pollacco, Don, additional, Queloz, Didier, additional, Rice, Ken, additional, Sasselov, Dimitar, additional, Ségransan, Damien, additional, Sozzetti, Alessandro, additional, Udry, Stéphane, additional, and Watson, Chris, additional

Published
2017
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3. KEPLER-21b: A ROCKY PLANET AROUND AV= 8.25 mag STAR

Author

López-Morales, Mercedes, primary, Haywood, Raphaëlle D., additional, Coughlin, Jeffrey L., additional, Zeng, Li, additional, Buchhave, Lars A., additional, Giles, Helen A. C., additional, Affer, Laura, additional, Bonomo, Aldo S., additional, Charbonneau, David, additional, Cameron, Andrew Collier, additional, Consentino, Rosario, additional, Dressing, Courtney D., additional, Dumusque, Xavier, additional, Figueira, Pedro, additional, Fiorenzano, Aldo F. M., additional, Harutyunyan, Avet, additional, Johnson, John Asher, additional, Latham, David W., additional, Lopez, Eric D., additional, Lovis, Christophe, additional, Malavolta, Luca, additional, Mayor, Michel, additional, Micela, Giusi, additional, Molinari, Emilio, additional, Mortier, Annelies, additional, Motalebi, Fatemeh, additional, Nascimbeni, Valerio, additional, Pepe, Francesco, additional, Phillips, David F., additional, Piotto, Giampaolo, additional, Pollacco, Don, additional, Queloz, Didier, additional, Rice, Ken, additional, Sasselov, Dimitar, additional, Segransan, Damien, additional, Sozzetti, Alessandro, additional, Udry, Stephane, additional, Vanderburg, Andrew, additional, and Watson, Chris, additional

Published
2016
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4. A 1.9 EARTH RADIUS ROCKY PLANET AND THE DISCOVERY OF A NON-TRANSITING PLANET IN THE KEPLER-20 SYSTEM

Author

Buchhave, Lars A., primary, Dressing, Courtney D., additional, Dumusque, Xavier, additional, Rice, Ken, additional, Vanderburg, Andrew, additional, Mortier, Annelies, additional, Lopez-Morales, Mercedes, additional, Lopez, Eric, additional, Lundkvist, Mia S., additional, Kjeldsen, Hans, additional, Affer, Laura, additional, Bonomo, Aldo S., additional, Charbonneau, David, additional, Cameron, Andrew Collier, additional, Cosentino, Rosario, additional, Figueira, Pedro, additional, Fiorenzano, Aldo F. M., additional, Harutyunyan, Avet, additional, Haywood, Raphaëlle D., additional, Johnson, John Asher, additional, Latham, David W., additional, Lovis, Christophe, additional, Malavolta, Luca, additional, Mayor, Michel, additional, Micela, Giusi, additional, Molinari, Emilio, additional, Motalebi, Fatemeh, additional, Nascimbeni, Valerio, additional, Pepe, Francesco, additional, Phillips, David F., additional, Piotto, Giampaolo, additional, Pollacco, Don, additional, Queloz, Didier, additional, Sasselov, Dimitar, additional, Ségransan, Damien, additional, Sozzetti, Alessandro, additional, Udry, Stéphane, additional, and Watson, Chris, additional

Published
2016
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5. THE KEPLER-454 SYSTEM: A SMALL, NOT-ROCKY INNER PLANET, A JOVIAN WORLD, AND A DISTANT COMPANION

Author

Gettel, Sara, primary, Charbonneau, David, additional, Dressing, Courtney D., additional, Buchhave, Lars A., additional, Dumusque, Xavier, additional, Vanderburg, Andrew, additional, Bonomo, Aldo S., additional, Malavolta, Luca, additional, Pepe, Francesco, additional, Cameron, Andrew Collier, additional, Latham, David W., additional, Udry, Stéphane, additional, Marcy, Geoffrey W., additional, Isaacson, Howard, additional, Howard, Andrew W., additional, Davies, Guy R., additional, Aguirre, Victor Silva, additional, Kjeldsen, Hans, additional, Bedding, Timothy R., additional, Lopez, Eric, additional, Affer, Laura, additional, Cosentino, Rosario, additional, Figueira, Pedro, additional, Fiorenzano, Aldo F. M., additional, Harutyunyan, Avet, additional, Johnson, John Asher, additional, Lopez-Morales, Mercedes, additional, Lovis, Christophe, additional, Mayor, Michel, additional, Micela, Giusi, additional, Molinari, Emilio, additional, Motalebi, Fatemeh, additional, Phillips, David F., additional, Piotto, Giampaolo, additional, Queloz, Didier, additional, Rice, Ken, additional, Sasselov, Dimitar, additional, Ségransan, Damien, additional, Sozzetti, Alessandro, additional, Watson, Chris, additional, Basu, Sarbani, additional, Campante, Tiago L., additional, Christensen-Dalsgaard, Jørgen, additional, Kawaler, Steven D., additional, Metcalfe, Travis S., additional, Handberg, Rasmus, additional, Lund, Mikkel N., additional, Lundkvist, Mia S., additional, Huber, Daniel, additional, and Chaplin, William J., additional

Published
2016
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6. THE MASS OF Kepler-93b AND THE COMPOSITION OF TERRESTRIAL PLANETS

Author

Dressing, Courtney D., primary, Charbonneau, David, additional, Dumusque, Xavier, additional, Gettel, Sara, additional, Pepe, Francesco, additional, Collier Cameron, Andrew, additional, Latham, David W., additional, Molinari, Emilio, additional, Udry, Stéphane, additional, Affer, Laura, additional, Bonomo, Aldo S., additional, Buchhave, Lars A., additional, Cosentino, Rosario, additional, Figueira, Pedro, additional, Fiorenzano, Aldo F. M., additional, Harutyunyan, Avet, additional, Haywood, Raphaëlle D., additional, Johnson, John Asher, additional, Lopez-Morales, Mercedes, additional, Lovis, Christophe, additional, Malavolta, Luca, additional, Mayor, Michel, additional, Micela, Giusi, additional, Motalebi, Fatemeh, additional, Nascimbeni, Valerio, additional, Phillips, David F., additional, Piotto, Giampaolo, additional, Pollacco, Don, additional, Queloz, Didier, additional, Rice, Ken, additional, Sasselov, Dimitar, additional, Ségransan, Damien, additional, Sozzetti, Alessandro, additional, Szentgyorgyi, Andrew, additional, and Watson, Chris, additional

Published
2015
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7. THE KEPLER-10 PLANETARY SYSTEM REVISITED BY HARPS-N: A HOT ROCKY WORLD AND A SOLID NEPTUNE-MASS PLANET

Author

Dumusque, Xavier, primary, Bonomo, Aldo S., additional, Haywood, Raphaëlle D., additional, Malavolta, Luca, additional, Ségransan, Damien, additional, Buchhave, Lars A., additional, Cameron, Andrew Collier, additional, Latham, David W., additional, Molinari, Emilio, additional, Pepe, Francesco, additional, Udry, Stéphane, additional, Charbonneau, David, additional, Cosentino, Rosario, additional, Dressing, Courtney D., additional, Figueira, Pedro, additional, Fiorenzano, Aldo F. M., additional, Gettel, Sara, additional, Harutyunyan, Avet, additional, Horne, Keith, additional, Lopez-Morales, Mercedes, additional, Lovis, Christophe, additional, Mayor, Michel, additional, Micela, Giusi, additional, Motalebi, Fatemeh, additional, Nascimbeni, Valerio, additional, Phillips, David F., additional, Piotto, Giampaolo, additional, Pollacco, Don, additional, Queloz, Didier, additional, Rice, Ken, additional, Sasselov, Dimitar, additional, Sozzetti, Alessandro, additional, Szentgyorgyi, Andrew, additional, and Watson, Chris, additional

Published
2014
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8. The Kepler-454 System: A Small, Not-rocky Inner Planet, a Jovian World, and a Distant Companion

Author

Gettel, Sara, Charbonneau, David, Dressing, Courtney D., Buchhave, Lars A., Dumusque, Xavier, Vanderburg, Andrew Michael, Bonomo, Aldo S., Malavolta, Luca, Pepe, Francesco, Cameron, Andrew Collier, Latham, David Winslow, Udry, Stéphane, Marcy, Geoffrey W., Isaacson, Howard, Howard, Andrew W., Davies, Guy R., Aguirre, Victor Silva, Kjeldsen, Hans, Bedding, Timothy R., Lopez, Eric, Affer, Laura, Cosentino, Rosario, Figueira, Pedro, Fiorenzano, Aldo F. M., Harutyunyan, Avet, Johnson, John Asher, Lopez-Morales, Mercedes, Lovis, Christophe, Mayor, Michel, Micela, Giusi, Molinari, Emilio, Motalebi, Fatemeh, Phillips, David F., Piotto, Giampaolo, Queloz, Didier, Rice, Ken, Sasselov, Dimitar D., Ségransan, Damien, Sozzetti, Alessandro, Watson, Chris, Basu, Sarbani, Campante, Tiago L., Christensen-Dalsgaard, Jørgen, Kawaler, Steven D., Metcalfe, Travis S., Handberg, Rasmus, Lund, Mikkel N., Lundkvist, Mia S., Huber, Daniel, and Chaplin, William J.

Abstract

Kepler-454 (KOI-273) is a relatively bright (V = 11.69 mag), Sun-like star that hosts a transiting planet candidate in a 10.6 day orbit. From spectroscopy, we estimate the stellar temperature to be 5687 ± 50 K, its metallicity to be [m/H] = 0.32 ± 0.08, and the projected rotational velocity to be v sin i < 2.4 km s−1. We combine these values with a study of the asteroseismic frequencies from short cadence Kepler data to estimate the stellar mass to be ${1.028}_{-0.03}^{+0.04}{M}_{\odot }$, the radius to be 1.066 ± 0.012 R⊙, and the age to be ${5.25}_{-1.39}^{+1.41}$ Gyr. We estimate the radius of the 10.6 day planet as 2.37 ± 0.13 R⊕. Using 63 radial velocity observations obtained with the HARPS-N spectrograph on the Telescopio Nazionale Galileo and 36 observations made with the HIRES spectrograph at the Keck Observatory, we measure the mass of this planet to be 6.8 ± 1.4 M⊕. We also detect two additional non-transiting companions, a planet with a minimum mass of 4.46 ± 0.12 MJ in a nearly circular 524 day orbit and a massive companion with a period >10 years and mass >12.1 MJ. The 12 exoplanets with radii <2.7 R⊕ and precise mass measurements appear to fall into two populations, with those <1.6 R⊕ following an Earth-like composition curve and larger planets requiring a significant fraction of volatiles. With a density of 2.76 ± 0.73 g cm−3, Kepler-454b lies near the mass transition between these two populations and requires the presence of volatiles and/or H/He gas., Astronomy

Published
2016
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9. A 1.9 Earth Radius Rocky Planet and the Discovery of a Non-Transiting Planet in the Kepler-20 System

Author

Buchhave, Lars A., Dressing, Courtney D., Dumusque, Xavier, Rice, Ken, Vanderburg, Andrew Michael, Mortier, Annelies, Lopez-Morales, Mercedes, Lopez, Eric, Lundkvist, Mia S., Kjeldsen, Hans, Affer, Laura, Bonomo, Aldo S., Charbonneau, David, Cameron, Andrew Collier, Cosentino, Rosario, Figueira, Pedro, Fiorenzano, Aldo F. M., Harutyunyan, Avet, Haywood, Raphaelle D., Johnson, John Asher, Latham, David Winslow, Lovis, Christophe, Malavolta, Luca, Mayor, Michel, Micela, Giusi, Molinari, Emilio, Motalebi, Fatemeh, Nascimbeni, Valerio, Pepe, Francesco, Phillips, David F., Piotto, Giampaolo, Pollacco, Don, Queloz, Didier, Sasselov, Dimitar D., Ségransan, Damien, Sozzetti, Alessandro, Udry, Stéphane, and Watson, Chris

Subjects
planetary systems, planets and satellites: composition, stars: individual (Kepler-20 = KOI-70, KIC 6850504, techniques: radial velocities
Abstract

Kepler-20 is a solar-type star (V = 12.5) hosting a compact system of five transiting planets, all packed within the orbital distance of Mercury in our own solar system. A transition from rocky to gaseous planets with a planetary transition radius of ~1.6 ${R}_{\oplus }$ has recently been proposed by several articles in the literature. Kepler-20b (${R}_{p}$ ~ 1.9 ${R}_{\oplus }$) has a size beyond this transition radius; however, previous mass measurements were not sufficiently precise to allow definite conclusions to be drawn regarding its composition. We present new mass measurements of three of the planets in the Kepler-20 system that are facilitated by 104 radial velocity measurements from the HARPS-N spectrograph and 30 archival Keck/HIRES observations, as well as an updated photometric analysis of the Kepler data and an asteroseismic analysis of the host star (${M}_{\star }$ = $0.948\pm 0.051$ ${M}_{\odot }$ and ${R}_{\star }$ = $0.964\pm 0.018$ ${R}_{\odot }$). Kepler-20b is a ${1.868}_{-0.034}^{+0.066}$ ${R}_{\oplus }$ planet in a 3.7 day period with a mass of ${9.70}_{-1.44}^{+1.41}$ ${M}_{\oplus }$, resulting in a mean density of ${8.2}_{-1.3}^{+1.5}$ ${\rm{g}}\,{\mathrm{cm}}^{-3}$, indicating a rocky composition with an iron-to-silicate ratio consistent with that of the Earth. This makes Kepler-20b the most massive planet with a rocky composition found to date. Furthermore, we report the discovery of an additional non-transiting planet with a minimum mass of ${19.96}_{-3.61}^{+3.08}$ ${M}_{\oplus }$ and an orbital period of ~34 days in the gap between Kepler-20f (P ~ 11 days) and Kepler-20d (P ~ 78 days)., Astronomy

Published
2016
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10. THE KEPLER-10 PLANETARY SYSTEM REVISITED BY HARPS-N: A HOT ROCKY WORLD AND A SOLID NEPTUNE-MASS PLANET

Author

Alessandro Sozzetti, Pedro Figueira, Rosario Cosentino, Xavier Dumusque, David Charbonneau, Keith Horne, Courtney D. Dressing, David F. Phillips, Andrew Szentgyorgyi, Sara Gettel, Christophe Lovis, Giampaolo Piotto, Don Pollacco, Mercedes Lopez-Morales, Michel Mayor, Raphaëlle D. Haywood, Aldo S. Bonomo, Stéphane Udry, Andrew Collier Cameron, Emilio Molinari, Valerio Nascimbeni, Dimitar Sasselov, Damien Ségransan, Christopher A. Watson, Ken Rice, Avet Harutyunyan, Didier Queloz, Francesco Pepe, Aldo F. M. Fiorenzano, David W. Latham, Luca Malavolta, Giuseppina Micela, Fatemeh Motalebi, Lars A. Buchhave, Dumusque, Xavier, Malavolta, Luca, Segransan, Damien, Pepe, Francesco Alfonso, Udry, Stéphane, Charbonneau, David, Figueira, Pedro Ricardo, Lovis, Christophe, Mayor, Michel, Motalebi, Fatemeh, Science & Technology Facilities Council, European Commission, and University of St Andrews. School of Physics and Astronomy

Subjects
stars: individual: Kepler-10 KOI-072 KIC 11904151, stars: statistics, Kepler, planetary systems, techniques: photometric, techniques: spectroscopic, photometric [techniques], individual: Kepler-10 KOI-072 KIC 11904151 [stars], Neptune, Planet, QB Astronomy, Photometric techniques, Spectrograph, QB, Physics, Individual stars (Kepler-10 KOI-072 KIC 11904151), Statistics, Astronomy, Astronomy and Astrophysics, Radius, Planetary system, individual (Kepler-10 KOI-072 KIC 11904151) [Stars], Radial velocity, Planetary systems, 13. Climate action, Space and Planetary Science, ddc:520, spectroscopic [techniques], Satellite, Spectroscopic techniques, Astrophysics - Earth and Planetary Astrophysics, statistics [stars]
Abstract

Kepler-10b was the first rocky planet detected by the Kepler satellite and con- firmed with radial velocity follow-up observations from Keck-HIRES. The mass of the planet was measured with a precision of around 30%, which was insufficient to constrain models of its internal structure and composition in detail. In addition to Kepler-10b, a second planet transiting the same star with a period of 45 days was sta- tistically validated, but the radial velocities were only good enough to set an upper limit of 20 Mearth for the mass of Kepler-10c. To improve the precision on the mass for planet b, the HARPS-N Collaboration decided to observe Kepler-10 intensively with the HARPS-N spectrograph on the Telescopio Nazionale Galileo on La Palma. In to- tal, 148 high-quality radial-velocity measurements were obtained over two observing seasons. These new data allow us to improve the precision of the mass determina- tion for Kepler-10b to 15%. With a mass of 3.33 +/- 0.49 Mearth and an updated radius of 1.47 +0.03 -0.02 Rearth, Kepler-10b has a density of 5.8 +/- 0.8 g cm-3, very close to the value -0.02 predicted by models with the same internal structure and composition as the Earth. We were also able to determine a mass for the 45-day period planet Kepler-10c, with an even better precision of 11%. With a mass of 17.2 +/- 1.9 Mearth and radius of 2.35 +0.09 -0.04 Rearth, -0.04 Kepler-10c has a density of 7.1 +/- 1.0 g cm-3. Kepler-10c appears to be the first strong evidence of a class of more massive solid planets with longer orbital periods., Comment: 44 pages, 8 figures, accepted for publication in ApJ

Published
2014
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