Discovery and Rossiter-McLaughlin Effect of Exoplanet Kepler-8b
We report the discovery and the Rossiter-McLaughlin effect of Kepler-8b, a transiting planet identified by the NASA Kepler Mission. Kepler photometry and Keck-HIRES radial velocities yield the radius and mass of the planet around this F8IV subgiant host star. The planet has a radius RP = 1.419 RJ an...
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| creator | Jenkins, Jon M Borucki, William J Koch, David G Marcy, Geoffrey W Cochran, William D Basri, Gibor Batalha, Natalie M Buchhave, Lars A Brown, Tim M Caldwell, Douglas A Dunham, Edward W Endl, Michael Fischer, Debra A Gautier, Thomas N Geary, John C Gilliland, Ronald L Howell, Steve B Isaacson, Howard John Asher Johnson Latham, David W Lissauer, Jack J Monet, David G Rowe, Jason F Sasselov, Dimitar D Welsh, William F Howard, Andrew W MacQueen, Phillip Chandrasekaran, Hema Twicken, Joseph D Bryson, Stephen T Quintana, Elisa V Clarke, Bruce D Li, Jie Allen, Christopher Tenenbaum, Peter Wu, Hayley Meibom, Soren Klaus, Todd C Middour, Christopher K Cote, Miles T McCauliff, Sean Girouard, rest R Gunter, Jay P Wohler, Bill Hall, Jennifer R Ibrahim, Khadeejah AKM Kamal Uddin Wu, Michael S Bhavsar, Paresh A Jeffrey Van Cleve Pletcher, David L Dotson, Jessie A Haas, Michael R |
| description | We report the discovery and the Rossiter-McLaughlin effect of Kepler-8b, a transiting planet identified by the NASA Kepler Mission. Kepler photometry and Keck-HIRES radial velocities yield the radius and mass of the planet around this F8IV subgiant host star. The planet has a radius RP = 1.419 RJ and a mass, MP = 0.60 MJ, yielding a density of 0.26 g cm^-3, among the lowest density planets known. The orbital period is P = 3.523 days and orbital semima jor axis is 0.0483+0.0006/-0.0012 AU. The star has a large rotational v sin i of 10.5 +/- 0.7 km s^-1 and is relatively faint (V = 13.89 mag), both properties deleterious to precise Doppler measurements. The velocities are indeed noisy, with scatter of 30 m s^-1, but exhibit a period and phase consistent with the planet implied by the photometry. We securely detect the Rossiter-McLaughlin effect, confirming the planet's existence and establishing its orbit as prograde. We measure an inclination between the projected planetary orbital axis and the projected stellar rotation axis of lambda = -26.9 +/- 4.6 deg, indicating a moderate inclination of the planetary orbit. Rossiter-McLaughlin measurements of a large sample of transiting planets from Kepler will provide a statistically robust measure of the true distribution of spin-orbit orientations for hot jupiters in general. |
| doi_str_mv | 10.48550/arxiv.1001.0416 |
| format | Article |
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Kepler photometry and Keck-HIRES radial velocities yield the radius and mass of the planet around this F8IV subgiant host star. The planet has a radius RP = 1.419 RJ and a mass, MP = 0.60 MJ, yielding a density of 0.26 g cm^-3, among the lowest density planets known. The orbital period is P = 3.523 days and orbital semima jor axis is 0.0483+0.0006/-0.0012 AU. The star has a large rotational v sin i of 10.5 +/- 0.7 km s^-1 and is relatively faint (V = 13.89 mag), both properties deleterious to precise Doppler measurements. The velocities are indeed noisy, with scatter of 30 m s^-1, but exhibit a period and phase consistent with the planet implied by the photometry. We securely detect the Rossiter-McLaughlin effect, confirming the planet's existence and establishing its orbit as prograde. We measure an inclination between the projected planetary orbital axis and the projected stellar rotation axis of lambda = -26.9 +/- 4.6 deg, indicating a moderate inclination of the planetary orbit. Rossiter-McLaughlin measurements of a large sample of transiting planets from Kepler will provide a statistically robust measure of the true distribution of spin-orbit orientations for hot jupiters in general.</description><identifier>EISSN: 2331-8422</identifier><identifier>DOI: 10.48550/arxiv.1001.0416</identifier><language>eng</language><publisher>Ithaca: Cornell University Library, arXiv.org</publisher><subject>Density ; Extrasolar planets ; Gas giant planets ; Inclination ; Kepler mission (NASA) ; Photometry ; Physics - Earth and Planetary Astrophysics ; Planetary orbits ; Planetary rotation ; Stellar rotation ; Transit</subject><ispartof>arXiv.org, 2010-01</ispartof><rights>2010. This work is published under http://arxiv.org/licenses/nonexclusive-distrib/1.0/ (the “License”). 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Kepler photometry and Keck-HIRES radial velocities yield the radius and mass of the planet around this F8IV subgiant host star. The planet has a radius RP = 1.419 RJ and a mass, MP = 0.60 MJ, yielding a density of 0.26 g cm^-3, among the lowest density planets known. The orbital period is P = 3.523 days and orbital semima jor axis is 0.0483+0.0006/-0.0012 AU. The star has a large rotational v sin i of 10.5 +/- 0.7 km s^-1 and is relatively faint (V = 13.89 mag), both properties deleterious to precise Doppler measurements. The velocities are indeed noisy, with scatter of 30 m s^-1, but exhibit a period and phase consistent with the planet implied by the photometry. We securely detect the Rossiter-McLaughlin effect, confirming the planet's existence and establishing its orbit as prograde. We measure an inclination between the projected planetary orbital axis and the projected stellar rotation axis of lambda = -26.9 +/- 4.6 deg, indicating a moderate inclination of the planetary orbit. Rossiter-McLaughlin measurements of a large sample of transiting planets from Kepler will provide a statistically robust measure of the true distribution of spin-orbit orientations for hot jupiters in general.</description><subject>Density</subject><subject>Extrasolar planets</subject><subject>Gas giant planets</subject><subject>Inclination</subject><subject>Kepler mission (NASA)</subject><subject>Photometry</subject><subject>Physics - Earth and Planetary Astrophysics</subject><subject>Planetary orbits</subject><subject>Planetary rotation</subject><subject>Stellar 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Kepler photometry and Keck-HIRES radial velocities yield the radius and mass of the planet around this F8IV subgiant host star. The planet has a radius RP = 1.419 RJ and a mass, MP = 0.60 MJ, yielding a density of 0.26 g cm^-3, among the lowest density planets known. The orbital period is P = 3.523 days and orbital semima jor axis is 0.0483+0.0006/-0.0012 AU. The star has a large rotational v sin i of 10.5 +/- 0.7 km s^-1 and is relatively faint (V = 13.89 mag), both properties deleterious to precise Doppler measurements. The velocities are indeed noisy, with scatter of 30 m s^-1, but exhibit a period and phase consistent with the planet implied by the photometry. We securely detect the Rossiter-McLaughlin effect, confirming the planet's existence and establishing its orbit as prograde. We measure an inclination between the projected planetary orbital axis and the projected stellar rotation axis of lambda = -26.9 +/- 4.6 deg, indicating a moderate inclination of the planetary orbit. Rossiter-McLaughlin measurements of a large sample of transiting planets from Kepler will provide a statistically robust measure of the true distribution of spin-orbit orientations for hot jupiters in general.</abstract><cop>Ithaca</cop><pub>Cornell University Library, arXiv.org</pub><doi>10.48550/arxiv.1001.0416</doi><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | EISSN: 2331-8422 |
| ispartof | arXiv.org, 2010-01 |
| issn | 2331-8422 |
| language | eng |
| recordid | cdi_arxiv_primary_1001_0416 |
| source | arXiv.org; Free E- Journals |
| subjects | Density Extrasolar planets Gas giant planets Inclination Kepler mission (NASA) Photometry Physics - Earth and Planetary Astrophysics Planetary orbits Planetary rotation Stellar rotation Transit |
| title | Discovery and Rossiter-McLaughlin Effect of Exoplanet Kepler-8b |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-24T15%3A08%3A39IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_arxiv&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Discovery%20and%20Rossiter-McLaughlin%20Effect%20of%20Exoplanet%20Kepler-8b&rft.jtitle=arXiv.org&rft.au=Jenkins,%20Jon%20M&rft.date=2010-01-04&rft.eissn=2331-8422&rft_id=info:doi/10.48550/arxiv.1001.0416&rft_dat=%3Cproquest_arxiv%3E2082157318%3C/proquest_arxiv%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=2082157318&rft_id=info:pmid/&rfr_iscdi=true |