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Start Over Author "Knutson, Heather" Journal monthly notices of the royal astronomical society
4 results on '"Knutson, Heather"'

1. Masses, revised radii, and a third planet candidate in the ‘Inverted’ planetary system around TOI-1266

Author

Cloutier, Ryan, primary, Greklek-McKeon, Michael, additional, Wurmser, Serena, additional, Cherubim, Collin, additional, Gillis, Erik, additional, Vanderburg, Andrew, additional, Hadden, Sam, additional, Cadieux, Charles, additional, Artigau, Étienne, additional, Vissapragada, Shreyas, additional, Mortier, Annelies, additional, López-Morales, Mercedes, additional, Latham, David W, additional, Knutson, Heather, additional, Haywood, Raphaëlle D, additional, Pallé, Enric, additional, Doyon, René, additional, Cook, Neil, additional, Andreuzzi, Gloria, additional, Cecconi, Massimo, additional, Cosentino, Rosario, additional, Ghedina, Adriano, additional, Harutyunyan, Avet, additional, Pinamonti, Matteo, additional, Stalport, Manu, additional, Damasso, Mario, additional, Rescigno, Federica, additional, Wilson, Thomas G, additional, Buchhave, Lars A, additional, Charbonneau, David, additional, Cameron, Andrew Collier, additional, Dumusque, Xavier, additional, Lovis, Christophe, additional, Mayor, Michel, additional, Molinari, Emilio, additional, Pepe, Francesco, additional, Piotto, Giampaolo, additional, Rice, Ken, additional, Sasselov, Dimitar, additional, Ségransan, Damien, additional, Sozzetti, Alessandro, additional, Udry, Stéphane, additional, and Watson, Chris A, additional

Published
2023
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2. Masses, revised radii, and a third planet candidate in the 'Inverted' planetary system around TOI-1266.

Author

Cloutier, Ryan, Greklek-McKeon, Michael, Wurmser, Serena, Cherubim, Collin, Gillis, Erik, Vanderburg, Andrew, Hadden, Sam, Cadieux, Charles, Artigau, Étienne, Vissapragada, Shreyas, Mortier, Annelies, López-Morales, Mercedes, Latham, David W, Knutson, Heather, Haywood, Raphaëlle D, Pallé, Enric, Doyon, René, Cook, Neil, Andreuzzi, Gloria, and Cecconi, Massimo

Subjects
ORIGIN of planets, PLANETARY mass, PLANETARY orbits, DWARF galaxies, PLANETARY systems, NATURAL satellites, VELOCITY measurements
Abstract

Is the population of close-in planets orbiting M dwarfs sculpted by thermally driven escape or is it a direct outcome of the planet formation process? A number of recent empirical results strongly suggest the latter. However, the unique architecture of the TOI-1266 system presents a challenge to models of planet formation and atmospheric escape given its seemingly 'inverted' architecture of a large sub-Neptune (P b = 10.9 d, |$R_{p,b}=2.62\pm 0.11\, \mathrm{R}_{\oplus }$|⁠) orbiting interior to that of the system's smaller planet (P c = 18.8 d, |$R_{p,c}=2.13\pm 0.12\, \mathrm{R}_{\oplus }$|⁠). Here, we present revised planetary radii based on new TESS and diffuser-assisted ground-based transit observations, and characterize both planetary masses using a set of 145 radial velocity measurements from HARPS-N (⁠|$M_{p,b}=4.23\pm 0.69\, \mathrm{M}_{\oplus }, M_{p,c}=2.88\pm 0.80\, \mathrm{M}_{\oplus }$|⁠). Our analysis also reveals a third planet candidate (P d = 32.3 d, |$M_{p,d}\sin {i} = 4.59^{+0.96}_{-0.94}\, \mathrm{M}_{\oplus }$|⁠), which if real, would form a chain of near 5:3 period ratios, although the system is likely not in a mean motion resonance. Our results indicate that TOI-1266 b and c are among the lowest density sub-Neptunes around M dwarfs and likely exhibit distinct bulk compositions of a gas-enveloped terrestrial (X env,b = 5.5 ± 0.7 per cent) and a water-rich world (WMFc = 59 ± 14 per cent), which is supported by hydrodynamic escape models. If distinct bulk compositions are confirmed through atmospheric characterization, the system's unique architecture would represent an interesting test case of inside-out sub-Neptune formation at pebble traps. [ABSTRACT FROM AUTHOR]

Published
2024
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3. Mass loss from the exoplanet WASP-12b inferred from Spitzer phase curves

Author

Bell, Taylor J, primary, Zhang, Michael, additional, Cubillos, Patricio E, additional, Dang, Lisa, additional, Fossati, Luca, additional, Todorov, Kamen O, additional, Cowan, Nicolas B, additional, Deming, Drake, additional, Zellem, Robert T, additional, Stevenson, Kevin B, additional, Crossfield, Ian J M, additional, Dobbs-Dixon, Ian, additional, Fortney, Jonathan J, additional, Knutson, Heather A, additional, and Line, Michael R, additional

Published
2019
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4. The thermal emission of the exoplanet WASP-3b

Author

Rostron, John W., primary, Wheatley, Peter J., additional, Anderson, David R., additional, Collier Cameron, Andrew, additional, Fortney, Jonathan J., additional, Harrington, Joseph, additional, Knutson, Heather A., additional, and Pollacco, Don L., additional

Published
2014
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