H-alpha and Ca ii Infrared Triplet Variations During a Transit of the 23 Myr Planet V1298 Tau c
Young transiting exoplanets (
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| Veröffentlicht in: | The Astronomical journal 2021-11, Vol.162 (5), p.213 |
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| container_title | The Astronomical journal |
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| creator | Feinstein, Adina D. Montet, Benjamin T. Johnson, Marshall C. Bean, Jacob L. David, Trevor J. Gully-Santiago, Michael A. Livingston, John H. Luger, Rodrigo |
| description | Young transiting exoplanets ( |
| doi_str_mv | 10.3847/1538-3881/ac1f24 |
| format | Article |
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R
⊕
planet orbiting a young K0-K1.5 solar analog with GRACES on Gemini North. We were able to measure the Doppler tomographic signal of V1298 Tau c using the Ca
ii
infrared triplet (IRT) and find a projected obliquity of
λ
= 5° ± 15°. The tomographic signal is only seen in the chromospherically driven core of the Ca
ii
IRT, which may be the result of star-planet interactions. Additionally, we find that excess absorption of the H
α
line decreases smoothly during the transit. While this could be a tentative detection of hot gas escaping the planet, we find this variation is consistent with similar timescale observations of other young stars that lack transiting planets over similar timescales. We show this variation can also be explained by the presence of starspots with surrounding facular regions. More observations both in and out of the transits of V1298 Tau c are required to determine the nature of the Ca
ii
IRT and H
α
line variations.</description><identifier>ISSN: 0004-6256</identifier><identifier>EISSN: 1538-3881</identifier><identifier>DOI: 10.3847/1538-3881/ac1f24</identifier><language>eng</language><publisher>Madison: The American Astronomical Society</publisher><subject>Astronomy ; Atmospheric composition ; Atmospheric evolution ; Exoplanet astronomy ; Exoplanet atmospheres ; Extrasolar planets ; H alpha line ; Obliquity ; Spectroscopy ; Starspots ; Stellar activity ; Transit ; Transmission spectroscopy</subject><ispartof>The Astronomical journal, 2021-11, Vol.162 (5), p.213</ispartof><rights>2021. The American Astronomical Society. All rights reserved.</rights><rights>Copyright IOP Publishing Nov 2021</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c375t-f5a5470a1a7edd10ef89184af8713e8c62c1f84059f6a8ae9498937ef77b2a8b3</citedby><cites>FETCH-LOGICAL-c375t-f5a5470a1a7edd10ef89184af8713e8c62c1f84059f6a8ae9498937ef77b2a8b3</cites><orcidid>0000-0002-4020-3457 ; 0000-0002-9464-8101 ; 0000-0001-7516-8308 ; 0000-0003-4733-6532 ; 0000-0001-6534-6246 ; 0000-0002-5099-8185 ; 0000-0002-4881-3620 ; 0000-0002-0296-3826</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://iopscience.iop.org/article/10.3847/1538-3881/ac1f24/pdf$$EPDF$$P50$$Giop$$H</linktopdf><link.rule.ids>314,780,784,27924,27925,38868,38890,53840,53867</link.rule.ids><linktorsrc>$$Uhttps://iopscience.iop.org/article/10.3847/1538-3881/ac1f24$$EView_record_in_IOP_Publishing$$FView_record_in_$$GIOP_Publishing</linktorsrc></links><search><creatorcontrib>Feinstein, Adina D.</creatorcontrib><creatorcontrib>Montet, Benjamin T.</creatorcontrib><creatorcontrib>Johnson, Marshall C.</creatorcontrib><creatorcontrib>Bean, Jacob L.</creatorcontrib><creatorcontrib>David, Trevor J.</creatorcontrib><creatorcontrib>Gully-Santiago, Michael A.</creatorcontrib><creatorcontrib>Livingston, John H.</creatorcontrib><creatorcontrib>Luger, Rodrigo</creatorcontrib><title>H-alpha and Ca ii Infrared Triplet Variations During a Transit of the 23 Myr Planet V1298 Tau c</title><title>The Astronomical journal</title><addtitle>AJ</addtitle><addtitle>Astron. J</addtitle><description>Young transiting exoplanets (<100 Myr) provide crucial insight into atmospheric evolution via photoevaporation. However, transmission spectroscopy measurements to determine atmospheric composition and mass loss are challenging due to the activity and prominent stellar disk inhomogeneities present on young stars. We observed a full transit of V1298 Tau c, a 23 Myr, 5.59
R
⊕
planet orbiting a young K0-K1.5 solar analog with GRACES on Gemini North. We were able to measure the Doppler tomographic signal of V1298 Tau c using the Ca
ii
infrared triplet (IRT) and find a projected obliquity of
λ
= 5° ± 15°. The tomographic signal is only seen in the chromospherically driven core of the Ca
ii
IRT, which may be the result of star-planet interactions. Additionally, we find that excess absorption of the H
α
line decreases smoothly during the transit. While this could be a tentative detection of hot gas escaping the planet, we find this variation is consistent with similar timescale observations of other young stars that lack transiting planets over similar timescales. We show this variation can also be explained by the presence of starspots with surrounding facular regions. More observations both in and out of the transits of V1298 Tau c are required to determine the nature of the Ca
ii
IRT and H
α
line variations.</description><subject>Astronomy</subject><subject>Atmospheric composition</subject><subject>Atmospheric evolution</subject><subject>Exoplanet astronomy</subject><subject>Exoplanet atmospheres</subject><subject>Extrasolar planets</subject><subject>H alpha line</subject><subject>Obliquity</subject><subject>Spectroscopy</subject><subject>Starspots</subject><subject>Stellar activity</subject><subject>Transit</subject><subject>Transmission spectroscopy</subject><issn>0004-6256</issn><issn>1538-3881</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNp1kD1PwzAQhi0EEqWwM1qCkVB_JpcRla9KRTAUVuua2NRVSYKdDP33JAqCBSZL5-d9T_cQcs7ZtQSVzbiWkEgAPsOCO6EOyORndEgmjDGVpEKnx-Qkxi1jnANTE2IeE9w1G6RYlXSO1Hu6qFzAYEu6Cr7Z2Za-YfDY-rqK9LYLvnqn2P9hFX1La0fbjaVC0qd9oC87rIYAFznQFXa0OCVHDnfRnn2_U_J6f7eaPybL54fF_GaZFDLTbeI0apUx5JjZsuTMOsg5KHSQcWmhSEV_FCimc5cioM1VDrnMrMuytUBYyym5GHubUH92NrZmW3eh6lcaoUHnWqUaeoqNVBHqGIN1pgn-A8PecGYGjWZwZgZnZtTYRy7HiK-b307cGp4Ko43g0jSl67GrP7B_W78Ag3F88Q</recordid><startdate>20211101</startdate><enddate>20211101</enddate><creator>Feinstein, Adina D.</creator><creator>Montet, Benjamin T.</creator><creator>Johnson, Marshall C.</creator><creator>Bean, Jacob L.</creator><creator>David, Trevor J.</creator><creator>Gully-Santiago, Michael A.</creator><creator>Livingston, John H.</creator><creator>Luger, Rodrigo</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/0000-0002-4020-3457</orcidid><orcidid>https://orcid.org/0000-0002-9464-8101</orcidid><orcidid>https://orcid.org/0000-0001-7516-8308</orcidid><orcidid>https://orcid.org/0000-0003-4733-6532</orcidid><orcidid>https://orcid.org/0000-0001-6534-6246</orcidid><orcidid>https://orcid.org/0000-0002-5099-8185</orcidid><orcidid>https://orcid.org/0000-0002-4881-3620</orcidid><orcidid>https://orcid.org/0000-0002-0296-3826</orcidid></search><sort><creationdate>20211101</creationdate><title>H-alpha and Ca ii Infrared Triplet Variations During a Transit of the 23 Myr Planet V1298 Tau c</title><author>Feinstein, Adina D. ; Montet, Benjamin T. ; Johnson, Marshall C. ; Bean, Jacob L. ; David, Trevor J. ; Gully-Santiago, Michael A. ; Livingston, John H. ; Luger, Rodrigo</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c375t-f5a5470a1a7edd10ef89184af8713e8c62c1f84059f6a8ae9498937ef77b2a8b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Astronomy</topic><topic>Atmospheric composition</topic><topic>Atmospheric evolution</topic><topic>Exoplanet astronomy</topic><topic>Exoplanet atmospheres</topic><topic>Extrasolar planets</topic><topic>H alpha line</topic><topic>Obliquity</topic><topic>Spectroscopy</topic><topic>Starspots</topic><topic>Stellar activity</topic><topic>Transit</topic><topic>Transmission spectroscopy</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Feinstein, Adina D.</creatorcontrib><creatorcontrib>Montet, Benjamin T.</creatorcontrib><creatorcontrib>Johnson, Marshall C.</creatorcontrib><creatorcontrib>Bean, Jacob L.</creatorcontrib><creatorcontrib>David, Trevor J.</creatorcontrib><creatorcontrib>Gully-Santiago, Michael A.</creatorcontrib><creatorcontrib>Livingston, John H.</creatorcontrib><creatorcontrib>Luger, Rodrigo</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>Feinstein, Adina D.</au><au>Montet, Benjamin T.</au><au>Johnson, Marshall C.</au><au>Bean, Jacob L.</au><au>David, Trevor J.</au><au>Gully-Santiago, Michael A.</au><au>Livingston, John H.</au><au>Luger, Rodrigo</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>H-alpha and Ca ii Infrared Triplet Variations During a Transit of the 23 Myr Planet V1298 Tau c</atitle><jtitle>The Astronomical journal</jtitle><stitle>AJ</stitle><addtitle>Astron. J</addtitle><date>2021-11-01</date><risdate>2021</risdate><volume>162</volume><issue>5</issue><spage>213</spage><pages>213-</pages><issn>0004-6256</issn><eissn>1538-3881</eissn><abstract>Young transiting exoplanets (<100 Myr) provide crucial insight into atmospheric evolution via photoevaporation. However, transmission spectroscopy measurements to determine atmospheric composition and mass loss are challenging due to the activity and prominent stellar disk inhomogeneities present on young stars. We observed a full transit of V1298 Tau c, a 23 Myr, 5.59
R
⊕
planet orbiting a young K0-K1.5 solar analog with GRACES on Gemini North. We were able to measure the Doppler tomographic signal of V1298 Tau c using the Ca
ii
infrared triplet (IRT) and find a projected obliquity of
λ
= 5° ± 15°. The tomographic signal is only seen in the chromospherically driven core of the Ca
ii
IRT, which may be the result of star-planet interactions. Additionally, we find that excess absorption of the H
α
line decreases smoothly during the transit. While this could be a tentative detection of hot gas escaping the planet, we find this variation is consistent with similar timescale observations of other young stars that lack transiting planets over similar timescales. We show this variation can also be explained by the presence of starspots with surrounding facular regions. More observations both in and out of the transits of V1298 Tau c are required to determine the nature of the Ca
ii
IRT and H
α
line variations.</abstract><cop>Madison</cop><pub>The American Astronomical Society</pub><doi>10.3847/1538-3881/ac1f24</doi><tpages>14</tpages><orcidid>https://orcid.org/0000-0002-4020-3457</orcidid><orcidid>https://orcid.org/0000-0002-9464-8101</orcidid><orcidid>https://orcid.org/0000-0001-7516-8308</orcidid><orcidid>https://orcid.org/0000-0003-4733-6532</orcidid><orcidid>https://orcid.org/0000-0001-6534-6246</orcidid><orcidid>https://orcid.org/0000-0002-5099-8185</orcidid><orcidid>https://orcid.org/0000-0002-4881-3620</orcidid><orcidid>https://orcid.org/0000-0002-0296-3826</orcidid><oa>free_for_read</oa></addata></record> |
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| source | Institute of Physics Open Access Journal Titles |
| subjects | Astronomy Atmospheric composition Atmospheric evolution Exoplanet astronomy Exoplanet atmospheres Extrasolar planets H alpha line Obliquity Spectroscopy Starspots Stellar activity Transit Transmission spectroscopy |
| title | H-alpha and Ca ii Infrared Triplet Variations During a Transit of the 23 Myr Planet V1298 Tau c |
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