Zodiacal Exoplanets in Time (ZEIT). VI. A Three-planet System in the Hyades Cluster Including an Earth-sized Planet
Planets in young clusters are powerful probes of the evolution of planetary systems. Here we report the discovery of three planets transiting EPIC 247589423, a late-K dwarf in the Hyades ( 800 Myr) cluster, and robust detection limits for additional planets in the system. The planets were identified...
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| Veröffentlicht in: | The Astronomical journal 2018-01, Vol.155 (1), p.4 |
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| creator | Mann, Andrew W. Vanderburg, Andrew Rizzuto, Aaron C. Kraus, Adam L. Berlind, Perry Bieryla, Allyson Calkins, Michael L. Esquerdo, Gilbert A. Latham, David W. Mace, Gregory N. Morris, Nathan R. Quinn, Samuel N. Sokal, Kimberly R. Stefanik, Robert P. |
| description | Planets in young clusters are powerful probes of the evolution of planetary systems. Here we report the discovery of three planets transiting EPIC 247589423, a late-K dwarf in the Hyades ( 800 Myr) cluster, and robust detection limits for additional planets in the system. The planets were identified from their K2 light curves as part of our survey of young clusters and star-forming regions. The smallest planet has a radius comparable to Earth ( ), making it one of the few Earth-sized planets with a known, young age. The two larger planets are likely a mini-Neptune and a super-Earth, with radii of and , respectively. The predicted radial velocity signals from these planets are between 0.4 and 2 m s−1, achievable with modern precision RV spectrographs. Because the target star is bright (V = 11.2) and has relatively low-amplitude stellar variability for a young star (2-6 mmag), EPIC 247589423 hosts the best known planets in a young open cluster for precise radial velocity follow-up, enabling a robust test of earlier claims that young planets are less dense than their older counterparts. |
| doi_str_mv | 10.3847/1538-3881/aa9791 |
| format | Article |
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Here we report the discovery of three planets transiting EPIC 247589423, a late-K dwarf in the Hyades ( 800 Myr) cluster, and robust detection limits for additional planets in the system. The planets were identified from their K2 light curves as part of our survey of young clusters and star-forming regions. The smallest planet has a radius comparable to Earth ( ), making it one of the few Earth-sized planets with a known, young age. The two larger planets are likely a mini-Neptune and a super-Earth, with radii of and , respectively. The predicted radial velocity signals from these planets are between 0.4 and 2 m s−1, achievable with modern precision RV spectrographs. Because the target star is bright (V = 11.2) and has relatively low-amplitude stellar variability for a young star (2-6 mmag), EPIC 247589423 hosts the best known planets in a young open cluster for precise radial velocity follow-up, enabling a robust test of earlier claims that young planets are less dense than their older counterparts.</description><identifier>ISSN: 0004-6256</identifier><identifier>EISSN: 1538-3881</identifier><identifier>DOI: 10.3847/1538-3881/aa9791</identifier><language>eng</language><publisher>Madison: The American Astronomical Society</publisher><subject>Astronomy ; Detection limits ; Earth ; Extrasolar planets ; Light curve ; open clusters and associations: individual (Hyades) ; Planetary evolution ; Planetary probes ; Planetary systems ; planets and satellites: detection ; planets and satellites: dynamical evolution and stability ; Radial velocity ; Robustness ; Spectrographs ; Star clusters ; Star formation ; stars: fundamental parameters ; stars: low-mass</subject><ispartof>The Astronomical journal, 2018-01, Vol.155 (1), p.4</ispartof><rights>2017. 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VI. A Three-planet System in the Hyades Cluster Including an Earth-sized Planet</title><title>The Astronomical journal</title><addtitle>AJ</addtitle><addtitle>Astron. J</addtitle><description>Planets in young clusters are powerful probes of the evolution of planetary systems. Here we report the discovery of three planets transiting EPIC 247589423, a late-K dwarf in the Hyades ( 800 Myr) cluster, and robust detection limits for additional planets in the system. The planets were identified from their K2 light curves as part of our survey of young clusters and star-forming regions. The smallest planet has a radius comparable to Earth ( ), making it one of the few Earth-sized planets with a known, young age. The two larger planets are likely a mini-Neptune and a super-Earth, with radii of and , respectively. The predicted radial velocity signals from these planets are between 0.4 and 2 m s−1, achievable with modern precision RV spectrographs. Because the target star is bright (V = 11.2) and has relatively low-amplitude stellar variability for a young star (2-6 mmag), EPIC 247589423 hosts the best known planets in a young open cluster for precise radial velocity follow-up, enabling a robust test of earlier claims that young planets are less dense than their older counterparts.</description><subject>Astronomy</subject><subject>Detection limits</subject><subject>Earth</subject><subject>Extrasolar planets</subject><subject>Light curve</subject><subject>open clusters and associations: individual (Hyades)</subject><subject>Planetary evolution</subject><subject>Planetary probes</subject><subject>Planetary systems</subject><subject>planets and satellites: detection</subject><subject>planets and satellites: dynamical evolution and stability</subject><subject>Radial velocity</subject><subject>Robustness</subject><subject>Spectrographs</subject><subject>Star clusters</subject><subject>Star formation</subject><subject>stars: fundamental parameters</subject><subject>stars: low-mass</subject><issn>0004-6256</issn><issn>1538-3881</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNp9kM9LwzAUx4MoOKd3j0EvCnZL-iNNjzKqKwwUrB52CWnz4jq6tiYtOP96Wyt6ES_vwZfP9z34IHROyczjfjingccdj3M6lzIKI3qAJj_RIZoQQnyHuQE7RifWbgmhlBN_guy6VoXMZYnj97opZQWtxUWF02IH-GodJ-n1DL8kM3yL040BcEYGP-1tC7uBbDeAl3upwOJF2fWpwUmVl50qqlcsKxxL024cW3yAwo9f5VN0pGVp4ex7T9HzXZwuls7q4T5Z3K6c3Pe91lFAFdWUcw5uP4Mw01TlUaA5z_qIE-DMVyRnQDS4WhEVZjnL_EBRj-scvCm6HO82pn7rwLZiW3em6l8K12MB4yyivKfISOWmttaAFo0pdtLsBSViUCsGj2LwKEa1feVmrBR183vzH_ziD1xuezIQVPiiUdr7BCuvhP8</recordid><startdate>20180101</startdate><enddate>20180101</enddate><creator>Mann, Andrew W.</creator><creator>Vanderburg, Andrew</creator><creator>Rizzuto, Aaron C.</creator><creator>Kraus, Adam L.</creator><creator>Berlind, Perry</creator><creator>Bieryla, Allyson</creator><creator>Calkins, Michael L.</creator><creator>Esquerdo, Gilbert A.</creator><creator>Latham, David W.</creator><creator>Mace, Gregory N.</creator><creator>Morris, Nathan R.</creator><creator>Quinn, Samuel N.</creator><creator>Sokal, Kimberly R.</creator><creator>Stefanik, Robert P.</creator><general>The American Astronomical Society</general><general>IOP Publishing</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>8FD</scope><scope>H8D</scope><scope>KL.</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0002-2830-5661</orcidid><orcidid>https://orcid.org/0000-0003-3654-1602</orcidid><orcidid>https://orcid.org/0000-0002-8964-8377</orcidid><orcidid>https://orcid.org/0000-0001-9811-568X</orcidid><orcidid>https://orcid.org/0000-0002-3621-1155</orcidid><orcidid>https://orcid.org/0000-0001-7875-6391</orcidid><orcidid>https://orcid.org/0000-0001-9982-1332</orcidid><orcidid>https://orcid.org/0000-0001-9911-7388</orcidid></search><sort><creationdate>20180101</creationdate><title>Zodiacal Exoplanets in Time (ZEIT). VI. A Three-planet System in the Hyades Cluster Including an Earth-sized Planet</title><author>Mann, Andrew W. ; Vanderburg, Andrew ; Rizzuto, Aaron C. ; Kraus, Adam L. ; Berlind, Perry ; Bieryla, Allyson ; Calkins, Michael L. ; Esquerdo, Gilbert A. ; Latham, David W. ; Mace, Gregory N. ; Morris, Nathan R. ; Quinn, Samuel N. ; Sokal, Kimberly R. ; Stefanik, Robert P.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c443t-de1d1f1888e218857bf1dc95f88b8e280e864d0c6e0fe2fd0d7bc6b45d138fce3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Astronomy</topic><topic>Detection limits</topic><topic>Earth</topic><topic>Extrasolar planets</topic><topic>Light curve</topic><topic>open clusters and associations: individual (Hyades)</topic><topic>Planetary evolution</topic><topic>Planetary probes</topic><topic>Planetary systems</topic><topic>planets and satellites: detection</topic><topic>planets and satellites: dynamical evolution and stability</topic><topic>Radial velocity</topic><topic>Robustness</topic><topic>Spectrographs</topic><topic>Star clusters</topic><topic>Star formation</topic><topic>stars: fundamental parameters</topic><topic>stars: low-mass</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Mann, Andrew W.</creatorcontrib><creatorcontrib>Vanderburg, Andrew</creatorcontrib><creatorcontrib>Rizzuto, Aaron C.</creatorcontrib><creatorcontrib>Kraus, Adam L.</creatorcontrib><creatorcontrib>Berlind, Perry</creatorcontrib><creatorcontrib>Bieryla, Allyson</creatorcontrib><creatorcontrib>Calkins, Michael L.</creatorcontrib><creatorcontrib>Esquerdo, Gilbert A.</creatorcontrib><creatorcontrib>Latham, David W.</creatorcontrib><creatorcontrib>Mace, Gregory N.</creatorcontrib><creatorcontrib>Morris, Nathan R.</creatorcontrib><creatorcontrib>Quinn, Samuel N.</creatorcontrib><creatorcontrib>Sokal, Kimberly R.</creatorcontrib><creatorcontrib>Stefanik, Robert P.</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>The Astronomical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Mann, Andrew W.</au><au>Vanderburg, Andrew</au><au>Rizzuto, Aaron C.</au><au>Kraus, Adam L.</au><au>Berlind, Perry</au><au>Bieryla, Allyson</au><au>Calkins, Michael L.</au><au>Esquerdo, Gilbert A.</au><au>Latham, David W.</au><au>Mace, Gregory N.</au><au>Morris, Nathan R.</au><au>Quinn, Samuel N.</au><au>Sokal, Kimberly R.</au><au>Stefanik, Robert P.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Zodiacal Exoplanets in Time (ZEIT). VI. A Three-planet System in the Hyades Cluster Including an Earth-sized Planet</atitle><jtitle>The Astronomical journal</jtitle><stitle>AJ</stitle><addtitle>Astron. J</addtitle><date>2018-01-01</date><risdate>2018</risdate><volume>155</volume><issue>1</issue><spage>4</spage><pages>4-</pages><issn>0004-6256</issn><eissn>1538-3881</eissn><abstract>Planets in young clusters are powerful probes of the evolution of planetary systems. Here we report the discovery of three planets transiting EPIC 247589423, a late-K dwarf in the Hyades ( 800 Myr) cluster, and robust detection limits for additional planets in the system. The planets were identified from their K2 light curves as part of our survey of young clusters and star-forming regions. The smallest planet has a radius comparable to Earth ( ), making it one of the few Earth-sized planets with a known, young age. The two larger planets are likely a mini-Neptune and a super-Earth, with radii of and , respectively. The predicted radial velocity signals from these planets are between 0.4 and 2 m s−1, achievable with modern precision RV spectrographs. Because the target star is bright (V = 11.2) and has relatively low-amplitude stellar variability for a young star (2-6 mmag), EPIC 247589423 hosts the best known planets in a young open cluster for precise radial velocity follow-up, enabling a robust test of earlier claims that young planets are less dense than their older counterparts.</abstract><cop>Madison</cop><pub>The American Astronomical Society</pub><doi>10.3847/1538-3881/aa9791</doi><tpages>11</tpages><orcidid>https://orcid.org/0000-0002-2830-5661</orcidid><orcidid>https://orcid.org/0000-0003-3654-1602</orcidid><orcidid>https://orcid.org/0000-0002-8964-8377</orcidid><orcidid>https://orcid.org/0000-0001-9811-568X</orcidid><orcidid>https://orcid.org/0000-0002-3621-1155</orcidid><orcidid>https://orcid.org/0000-0001-7875-6391</orcidid><orcidid>https://orcid.org/0000-0001-9982-1332</orcidid><orcidid>https://orcid.org/0000-0001-9911-7388</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Astronomy Detection limits Earth Extrasolar planets Light curve open clusters and associations: individual (Hyades) Planetary evolution Planetary probes Planetary systems planets and satellites: detection planets and satellites: dynamical evolution and stability Radial velocity Robustness Spectrographs Star clusters Star formation stars: fundamental parameters stars: low-mass |
| title | Zodiacal Exoplanets in Time (ZEIT). VI. A Three-planet System in the Hyades Cluster Including an Earth-sized Planet |
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