HAT-P-44b, HAT-P-45b, AND HAT-P-46b: THREE TRANSITING HOT JUPITERS IN POSSIBLE MULTI-PLANET SYSTEMS
We report the discovery by the HATNet survey of three new transiting extrasolar planets orbiting moderately bright (V = 13.2, 12.8, and 11.9) stars. The planets have orbital periods of 4.3012, 3.1290, and 4.4631 days, masses of 0.35, 0.89, and 0.49 M [subscript J], and radii of 1.24, 1.43, and 1.28...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | en_US |
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IOP Publishing
2015
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| Online Access: | http://hdl.handle.net/1721.1/94555 |
| _version_ | 1826208994221359104 |
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| author | Hartman, Joel D. Torres, G. Johnson, J. A. Howard, Andrew W. Marcy, Geoffrey W. Latham, David W. Bieryla, A. Buchhave, Lars A. Bhatti, W. Csubry, Z. Penev, K. de Val-Borro, M. Noyes, Robert W. Fischer, Debra A. Esquerdo, G. A. Everett, Mark E. Zhou, G. Bayliss, D. Shporer, A. Fulton, Benjamin J. Falco, E. Papp, I. Sanchis Ojeda, Roberto Bakos, Gaspar A. Kovacs, Geza Beky, B. Szklenar, T. Lazar, J. Sari, P. |
| author2 | MIT Kavli Institute for Astrophysics and Space Research |
| author_facet | MIT Kavli Institute for Astrophysics and Space Research Hartman, Joel D. Torres, G. Johnson, J. A. Howard, Andrew W. Marcy, Geoffrey W. Latham, David W. Bieryla, A. Buchhave, Lars A. Bhatti, W. Csubry, Z. Penev, K. de Val-Borro, M. Noyes, Robert W. Fischer, Debra A. Esquerdo, G. A. Everett, Mark E. Zhou, G. Bayliss, D. Shporer, A. Fulton, Benjamin J. Falco, E. Papp, I. Sanchis Ojeda, Roberto Bakos, Gaspar A. Kovacs, Geza Beky, B. Szklenar, T. Lazar, J. Sari, P. |
| author_sort | Hartman, Joel D. |
| collection | MIT |
| description | We report the discovery by the HATNet survey of three new transiting extrasolar planets orbiting moderately bright (V = 13.2, 12.8, and 11.9) stars. The planets have orbital periods of 4.3012, 3.1290, and 4.4631 days, masses of 0.35, 0.89, and 0.49 M [subscript J], and radii of 1.24, 1.43, and 1.28 R [subscript J]. The stellar hosts have masses of 0.94, 1.26, and 1.28 M [subscript ☉]. Each system shows significant systematic variations in its residual radial velocities, indicating the possible presence of additional components. Based on its Bayesian evidence, the preferred model for HAT-P-44 consists of two planets, including the transiting component, with the outer planet having a period of 872 days, eccentricity of 0.494 ± 0.081, and a minimum mass of 4.0 M [subscript J]. Due to aliasing we cannot rule out alternative solutions for the outer planet having a period of 220 days or 438 days. For HAT-P-45, at present there is not enough data to justify the additional free parameters included in a multi-planet model; in this case a single-planet solution is preferred, but the required jitter of 22.5 ± 6.3 m s[superscript –1] is relatively high for a star of this type. For HAT-P-46 the preferred solution includes a second planet having a period of 78 days and a minimum mass of 2.0 M [subscript J], however the preference for this model over a single-planet model is not very strong. While substantial uncertainties remain as to the presence and/or properties of the outer planetary companions in these systems, the inner transiting planets are well characterized with measured properties that are fairly robust against changes in the assumed models for the outer planets. Continued radial velocity monitoring is necessary to fully characterize these three planetary systems, the properties of which may have important implications for understanding the formation of hot Jupiters. |
| first_indexed | 2024-09-23T14:15:42Z |
| format | Article |
| id | mit-1721.1/94555 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T14:15:42Z |
| publishDate | 2015 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/945552022-10-01T20:10:31Z HAT-P-44b, HAT-P-45b, AND HAT-P-46b: THREE TRANSITING HOT JUPITERS IN POSSIBLE MULTI-PLANET SYSTEMS Hartman, Joel D. Torres, G. Johnson, J. A. Howard, Andrew W. Marcy, Geoffrey W. Latham, David W. Bieryla, A. Buchhave, Lars A. Bhatti, W. Csubry, Z. Penev, K. de Val-Borro, M. Noyes, Robert W. Fischer, Debra A. Esquerdo, G. A. Everett, Mark E. Zhou, G. Bayliss, D. Shporer, A. Fulton, Benjamin J. Falco, E. Papp, I. Sanchis Ojeda, Roberto Bakos, Gaspar A. Kovacs, Geza Beky, B. Szklenar, T. Lazar, J. Sari, P. MIT Kavli Institute for Astrophysics and Space Research Sanchis Ojeda, Roberto We report the discovery by the HATNet survey of three new transiting extrasolar planets orbiting moderately bright (V = 13.2, 12.8, and 11.9) stars. The planets have orbital periods of 4.3012, 3.1290, and 4.4631 days, masses of 0.35, 0.89, and 0.49 M [subscript J], and radii of 1.24, 1.43, and 1.28 R [subscript J]. The stellar hosts have masses of 0.94, 1.26, and 1.28 M [subscript ☉]. Each system shows significant systematic variations in its residual radial velocities, indicating the possible presence of additional components. Based on its Bayesian evidence, the preferred model for HAT-P-44 consists of two planets, including the transiting component, with the outer planet having a period of 872 days, eccentricity of 0.494 ± 0.081, and a minimum mass of 4.0 M [subscript J]. Due to aliasing we cannot rule out alternative solutions for the outer planet having a period of 220 days or 438 days. For HAT-P-45, at present there is not enough data to justify the additional free parameters included in a multi-planet model; in this case a single-planet solution is preferred, but the required jitter of 22.5 ± 6.3 m s[superscript –1] is relatively high for a star of this type. For HAT-P-46 the preferred solution includes a second planet having a period of 78 days and a minimum mass of 2.0 M [subscript J], however the preference for this model over a single-planet model is not very strong. While substantial uncertainties remain as to the presence and/or properties of the outer planetary companions in these systems, the inner transiting planets are well characterized with measured properties that are fairly robust against changes in the assumed models for the outer planets. Continued radial velocity monitoring is necessary to fully characterize these three planetary systems, the properties of which may have important implications for understanding the formation of hot Jupiters. 2015-02-17T15:55:14Z 2015-02-17T15:55:14Z 2014-04 2013-08 Article http://purl.org/eprint/type/JournalArticle 0004-6256 1538-3881 http://hdl.handle.net/1721.1/94555 Hartman, J. D., G. A. Bakos, G. Torres, G. Kovacs, J. A. Johnson, A. W. Howard, G. W. Marcy, et al. “HAT-P-44b, HAT-P-45b, AND HAT-P-46b: THREE TRANSITING HOT JUPITERS IN POSSIBLE MULTI-PLANET SYSTEMS.” The Astronomical Journal 147, no. 6 (April 24, 2014): 128. © 2014 The American Astronomical Society en_US http://dx.doi.org/10.1088/0004-6256/147/6/128 The Astronomical Journal Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf IOP Publishing American Astronomical Society |
| spellingShingle | Hartman, Joel D. Torres, G. Johnson, J. A. Howard, Andrew W. Marcy, Geoffrey W. Latham, David W. Bieryla, A. Buchhave, Lars A. Bhatti, W. Csubry, Z. Penev, K. de Val-Borro, M. Noyes, Robert W. Fischer, Debra A. Esquerdo, G. A. Everett, Mark E. Zhou, G. Bayliss, D. Shporer, A. Fulton, Benjamin J. Falco, E. Papp, I. Sanchis Ojeda, Roberto Bakos, Gaspar A. Kovacs, Geza Beky, B. Szklenar, T. Lazar, J. Sari, P. HAT-P-44b, HAT-P-45b, AND HAT-P-46b: THREE TRANSITING HOT JUPITERS IN POSSIBLE MULTI-PLANET SYSTEMS |
| title | HAT-P-44b, HAT-P-45b, AND HAT-P-46b: THREE TRANSITING HOT JUPITERS IN POSSIBLE MULTI-PLANET SYSTEMS |
| title_full | HAT-P-44b, HAT-P-45b, AND HAT-P-46b: THREE TRANSITING HOT JUPITERS IN POSSIBLE MULTI-PLANET SYSTEMS |
| title_fullStr | HAT-P-44b, HAT-P-45b, AND HAT-P-46b: THREE TRANSITING HOT JUPITERS IN POSSIBLE MULTI-PLANET SYSTEMS |
| title_full_unstemmed | HAT-P-44b, HAT-P-45b, AND HAT-P-46b: THREE TRANSITING HOT JUPITERS IN POSSIBLE MULTI-PLANET SYSTEMS |
| title_short | HAT-P-44b, HAT-P-45b, AND HAT-P-46b: THREE TRANSITING HOT JUPITERS IN POSSIBLE MULTI-PLANET SYSTEMS |
| title_sort | hat p 44b hat p 45b and hat p 46b three transiting hot jupiters in possible multi planet systems |
| url | http://hdl.handle.net/1721.1/94555 |
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