HATS-7b: A Hot Super Neptune Transiting a Quiet K Dwarf Star
IW ../submit_V2/abstract.txt ( Row 1 Col 1 6:48 Ctrl-K H for help We report the discovery by the HATSouth network of HATS-7b, a transiting Super-Neptune with a mass of 0.120+/-0.012MJ, a radius of 0.563+/-(0.046,0.034)RJ, and an orbital period of 3.1853days. The host star is a moderately bright (V=1...
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ftdatacite:10.48550/arxiv.1507.01024 2023-05-15T16:39:23+02:00 HATS-7b: A Hot Super Neptune Transiting a Quiet K Dwarf Star Bakos, G. Á. Penev, K. Bayliss, D. Hartman, J. D. Zhou, G. Brahm, R. Mancini, L. de Val-Borro, M. Bhatti, W. Jordán, A. Rabus, M. Espinoza, N. Csubry, Z. Howard, A. W. Fulton, B. J. Buchhave, L. A. Ciceri, S. Henning, T. Schmidt, B. Isaacson, H. Noyes, R. W. Marcy, G. W. Suc, V. Howe, A. R. Burrows, A. S. Lázár, J. Papp, I. Sári, P. 2015 https://dx.doi.org/10.48550/arxiv.1507.01024 https://arxiv.org/abs/1507.01024 unknown arXiv https://dx.doi.org/10.1088/0004-637x/813/2/111 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Earth and Planetary Astrophysics astro-ph.EP FOS Physical sciences article-journal Article ScholarlyArticle Text 2015 ftdatacite https://doi.org/10.48550/arxiv.1507.01024 https://doi.org/10.1088/0004-637x/813/2/111 2022-04-01T12:09:46Z IW ../submit_V2/abstract.txt ( Row 1 Col 1 6:48 Ctrl-K H for help We report the discovery by the HATSouth network of HATS-7b, a transiting Super-Neptune with a mass of 0.120+/-0.012MJ, a radius of 0.563+/-(0.046,0.034)RJ, and an orbital period of 3.1853days. The host star is a moderately bright (V=13.340+/-0.010mag, K_S=10.976+/-0.026mag) K dwarf star with a mass of 0.849+/-0.027Msun , a radius of 0.815+/-(0.049,-0.035)Rsun, and a metallicity of [Fe/H]=+0.250+/-0.080. The star is photometrically quiet to within the precision of the HATSouth measurements and has low RV jitter. HATS-7b is the second smallest radius planet discovered by a wide-field ground-based transit survey, and one of only a handful of Neptune-size planets with mass and radius determined to 10% precision. Theoretical modeling of HATS-7b yields a hydrogen-helium fraction of 18+/-4% (rock-iron core and H2-He envelope), or 9+/-4% (ice core and H2-He envelope), i.e.it has a composition broadly similar to that of Uranus and Neptune, and very different from that of Saturn, which has 75% of its mass in H2-He. Based on a sample of transiting exoplanets with accurately (<20%) determined parameters, we establish approximate power-law relations for the envelopes of the mass-density distribution of exoplanets. HATS-7b, which, together with the recently discovered HATS-8b, is one of the first two transiting super-Neptunes discovered in the Southern sky, is a prime target for additional follow-up observations with Southern hemisphere facilities to characterize the atmospheres of Super-Neptunes (which we define as objects with mass greater than that of Neptune, and smaller than halfway between that of Neptune and Saturn, i.e. 0.054 MJ : 11 pages, accepted for publication by ApJ Text ice core DataCite Metadata Store (German National Library of Science and Technology) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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Earth and Planetary Astrophysics astro-ph.EP FOS Physical sciences |
spellingShingle |
Earth and Planetary Astrophysics astro-ph.EP FOS Physical sciences Bakos, G. Á. Penev, K. Bayliss, D. Hartman, J. D. Zhou, G. Brahm, R. Mancini, L. de Val-Borro, M. Bhatti, W. Jordán, A. Rabus, M. Espinoza, N. Csubry, Z. Howard, A. W. Fulton, B. J. Buchhave, L. A. Ciceri, S. Henning, T. Schmidt, B. Isaacson, H. Noyes, R. W. Marcy, G. W. Suc, V. Howe, A. R. Burrows, A. S. Lázár, J. Papp, I. Sári, P. HATS-7b: A Hot Super Neptune Transiting a Quiet K Dwarf Star |
topic_facet |
Earth and Planetary Astrophysics astro-ph.EP FOS Physical sciences |
description |
IW ../submit_V2/abstract.txt ( Row 1 Col 1 6:48 Ctrl-K H for help We report the discovery by the HATSouth network of HATS-7b, a transiting Super-Neptune with a mass of 0.120+/-0.012MJ, a radius of 0.563+/-(0.046,0.034)RJ, and an orbital period of 3.1853days. The host star is a moderately bright (V=13.340+/-0.010mag, K_S=10.976+/-0.026mag) K dwarf star with a mass of 0.849+/-0.027Msun , a radius of 0.815+/-(0.049,-0.035)Rsun, and a metallicity of [Fe/H]=+0.250+/-0.080. The star is photometrically quiet to within the precision of the HATSouth measurements and has low RV jitter. HATS-7b is the second smallest radius planet discovered by a wide-field ground-based transit survey, and one of only a handful of Neptune-size planets with mass and radius determined to 10% precision. Theoretical modeling of HATS-7b yields a hydrogen-helium fraction of 18+/-4% (rock-iron core and H2-He envelope), or 9+/-4% (ice core and H2-He envelope), i.e.it has a composition broadly similar to that of Uranus and Neptune, and very different from that of Saturn, which has 75% of its mass in H2-He. Based on a sample of transiting exoplanets with accurately (<20%) determined parameters, we establish approximate power-law relations for the envelopes of the mass-density distribution of exoplanets. HATS-7b, which, together with the recently discovered HATS-8b, is one of the first two transiting super-Neptunes discovered in the Southern sky, is a prime target for additional follow-up observations with Southern hemisphere facilities to characterize the atmospheres of Super-Neptunes (which we define as objects with mass greater than that of Neptune, and smaller than halfway between that of Neptune and Saturn, i.e. 0.054 MJ : 11 pages, accepted for publication by ApJ |
format |
Text |
author |
Bakos, G. Á. Penev, K. Bayliss, D. Hartman, J. D. Zhou, G. Brahm, R. Mancini, L. de Val-Borro, M. Bhatti, W. Jordán, A. Rabus, M. Espinoza, N. Csubry, Z. Howard, A. W. Fulton, B. J. Buchhave, L. A. Ciceri, S. Henning, T. Schmidt, B. Isaacson, H. Noyes, R. W. Marcy, G. W. Suc, V. Howe, A. R. Burrows, A. S. Lázár, J. Papp, I. Sári, P. |
author_facet |
Bakos, G. Á. Penev, K. Bayliss, D. Hartman, J. D. Zhou, G. Brahm, R. Mancini, L. de Val-Borro, M. Bhatti, W. Jordán, A. Rabus, M. Espinoza, N. Csubry, Z. Howard, A. W. Fulton, B. J. Buchhave, L. A. Ciceri, S. Henning, T. Schmidt, B. Isaacson, H. Noyes, R. W. Marcy, G. W. Suc, V. Howe, A. R. Burrows, A. S. Lázár, J. Papp, I. Sári, P. |
author_sort |
Bakos, G. Á. |
title |
HATS-7b: A Hot Super Neptune Transiting a Quiet K Dwarf Star |
title_short |
HATS-7b: A Hot Super Neptune Transiting a Quiet K Dwarf Star |
title_full |
HATS-7b: A Hot Super Neptune Transiting a Quiet K Dwarf Star |
title_fullStr |
HATS-7b: A Hot Super Neptune Transiting a Quiet K Dwarf Star |
title_full_unstemmed |
HATS-7b: A Hot Super Neptune Transiting a Quiet K Dwarf Star |
title_sort |
hats-7b: a hot super neptune transiting a quiet k dwarf star |
publisher |
arXiv |
publishDate |
2015 |
url |
https://dx.doi.org/10.48550/arxiv.1507.01024 https://arxiv.org/abs/1507.01024 |
genre |
ice core |
genre_facet |
ice core |
op_relation |
https://dx.doi.org/10.1088/0004-637x/813/2/111 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.1507.01024 https://doi.org/10.1088/0004-637x/813/2/111 |
_version_ |
1766029727155355648 |