The TESS-Keck Survey. XII. A Dense 1.8 R$_\oplus$ Ultra-Short-Period Planet Possibly Clinging to a High-Mean-Molecular-Weight Atmosphere After the First Gyr
The extreme environments of ultra-short-period planets (USPs) make excellent laboratories to study how exoplanets obtain, lose, retain, and/or regain gaseous atmospheres. We present the confirmation and characterization of the USP TOI-1347 b, a $1.8 \pm 0.1$ R$_\oplus$ planet on a 0.85 day orbit tha...
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| creator | Rubenzahl, Ryan A Dai, Fei Howard, Andrew W Lissauer, Jack J Van Zandt, Judah Beard, Corey Giacalone, Steven Murphy, Joseph M. Akana Chontos, Ashley Lubin, Jack Brinkman, Casey Tyler, Dakotah MacDougall, Mason G Rice, Malena Dalba, Paul A Mayo, Andrew W Weiss, Lauren M Polanski, Alex S Blunt, Sarah Yee, Samuel W Hill, Michelle L Angelo, Isabel Turtelboom, Emma V Holcomb, Rae Behmard, Aida Pidhorodetska, Daria Batahla, Natalie M Crossfield, Ian J. M Dressing, Courtney Fulton, Benjamin Huber, Daniel Isaacson, Howard Kane, Stephen R Petigura, Erik A Robertson, Paul Scarsdale, Nicholas Mocnik, Teo Fetherolf, Tara Malavolta, Luca Mortier, Annelies Fiorenzano, Aldo Pedani, Marco |
| description | The extreme environments of ultra-short-period planets (USPs) make excellent
laboratories to study how exoplanets obtain, lose, retain, and/or regain
gaseous atmospheres. We present the confirmation and characterization of the
USP TOI-1347 b, a $1.8 \pm 0.1$ R$_\oplus$ planet on a 0.85 day orbit that was
detected with photometry from the TESS mission. We measured radial velocities
of the TOI-1347 system using Keck/HIRES and HARPS-N and found the USP to be
unusually massive at $11.1 \pm 1.2$ M$_\oplus$. The measured mass and radius of
TOI-1347 b imply an Earth-like bulk composition. A thin H/He envelope (>0.01%
by mass) can be ruled out at high confidence. The system is between 1 and 1.8
Gyr old; therefore, intensive photoevaporation should have concluded. We
detected a tentative phase curve variation (3$\sigma$) and a secondary eclipse
(2$\sigma$) in TESS photometry, which if confirmed could indicate the presence
of a high-mean-molecular-weight atmosphere. We recommend additional optical and
infrared observations to confirm the presence of an atmosphere and investigate
its composition. |
| doi_str_mv | 10.48550/arxiv.2402.07451 |
| format | Article |
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laboratories to study how exoplanets obtain, lose, retain, and/or regain
gaseous atmospheres. We present the confirmation and characterization of the
USP TOI-1347 b, a $1.8 \pm 0.1$ R$_\oplus$ planet on a 0.85 day orbit that was
detected with photometry from the TESS mission. We measured radial velocities
of the TOI-1347 system using Keck/HIRES and HARPS-N and found the USP to be
unusually massive at $11.1 \pm 1.2$ M$_\oplus$. The measured mass and radius of
TOI-1347 b imply an Earth-like bulk composition. A thin H/He envelope (>0.01%
by mass) can be ruled out at high confidence. The system is between 1 and 1.8
Gyr old; therefore, intensive photoevaporation should have concluded. We
detected a tentative phase curve variation (3$\sigma$) and a secondary eclipse
(2$\sigma$) in TESS photometry, which if confirmed could indicate the presence
of a high-mean-molecular-weight atmosphere. We recommend additional optical and
infrared observations to confirm the presence of an atmosphere and investigate
its composition.</description><identifier>DOI: 10.48550/arxiv.2402.07451</identifier><language>eng</language><subject>Physics - Earth and Planetary Astrophysics</subject><creationdate>2024-02</creationdate><rights>http://creativecommons.org/licenses/by/4.0</rights><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>228,230,780,885</link.rule.ids><linktorsrc>$$Uhttps://arxiv.org/abs/2402.07451$$EView_record_in_Cornell_University$$FView_record_in_$$GCornell_University$$Hfree_for_read</linktorsrc><backlink>$$Uhttps://doi.org/10.48550/arXiv.2402.07451$$DView paper in arXiv$$Hfree_for_read</backlink></links><search><creatorcontrib>Rubenzahl, Ryan A</creatorcontrib><creatorcontrib>Dai, Fei</creatorcontrib><creatorcontrib>Howard, Andrew W</creatorcontrib><creatorcontrib>Lissauer, Jack J</creatorcontrib><creatorcontrib>Van Zandt, Judah</creatorcontrib><creatorcontrib>Beard, Corey</creatorcontrib><creatorcontrib>Giacalone, Steven</creatorcontrib><creatorcontrib>Murphy, Joseph M. Akana</creatorcontrib><creatorcontrib>Chontos, Ashley</creatorcontrib><creatorcontrib>Lubin, Jack</creatorcontrib><creatorcontrib>Brinkman, Casey</creatorcontrib><creatorcontrib>Tyler, Dakotah</creatorcontrib><creatorcontrib>MacDougall, Mason G</creatorcontrib><creatorcontrib>Rice, Malena</creatorcontrib><creatorcontrib>Dalba, Paul A</creatorcontrib><creatorcontrib>Mayo, Andrew W</creatorcontrib><creatorcontrib>Weiss, Lauren M</creatorcontrib><creatorcontrib>Polanski, Alex S</creatorcontrib><creatorcontrib>Blunt, Sarah</creatorcontrib><creatorcontrib>Yee, Samuel W</creatorcontrib><creatorcontrib>Hill, Michelle L</creatorcontrib><creatorcontrib>Angelo, Isabel</creatorcontrib><creatorcontrib>Turtelboom, Emma V</creatorcontrib><creatorcontrib>Holcomb, Rae</creatorcontrib><creatorcontrib>Behmard, Aida</creatorcontrib><creatorcontrib>Pidhorodetska, Daria</creatorcontrib><creatorcontrib>Batahla, Natalie M</creatorcontrib><creatorcontrib>Crossfield, Ian J. M</creatorcontrib><creatorcontrib>Dressing, Courtney</creatorcontrib><creatorcontrib>Fulton, Benjamin</creatorcontrib><creatorcontrib>Huber, Daniel</creatorcontrib><creatorcontrib>Isaacson, Howard</creatorcontrib><creatorcontrib>Kane, Stephen R</creatorcontrib><creatorcontrib>Petigura, Erik A</creatorcontrib><creatorcontrib>Robertson, Paul</creatorcontrib><creatorcontrib>Scarsdale, Nicholas</creatorcontrib><creatorcontrib>Mocnik, Teo</creatorcontrib><creatorcontrib>Fetherolf, Tara</creatorcontrib><creatorcontrib>Malavolta, Luca</creatorcontrib><creatorcontrib>Mortier, Annelies</creatorcontrib><creatorcontrib>Fiorenzano, Aldo</creatorcontrib><creatorcontrib>Pedani, Marco</creatorcontrib><title>The TESS-Keck Survey. XII. A Dense 1.8 R$_\oplus$ Ultra-Short-Period Planet Possibly Clinging to a High-Mean-Molecular-Weight Atmosphere After the First Gyr</title><description>The extreme environments of ultra-short-period planets (USPs) make excellent
laboratories to study how exoplanets obtain, lose, retain, and/or regain
gaseous atmospheres. We present the confirmation and characterization of the
USP TOI-1347 b, a $1.8 \pm 0.1$ R$_\oplus$ planet on a 0.85 day orbit that was
detected with photometry from the TESS mission. We measured radial velocities
of the TOI-1347 system using Keck/HIRES and HARPS-N and found the USP to be
unusually massive at $11.1 \pm 1.2$ M$_\oplus$. The measured mass and radius of
TOI-1347 b imply an Earth-like bulk composition. A thin H/He envelope (>0.01%
by mass) can be ruled out at high confidence. The system is between 1 and 1.8
Gyr old; therefore, intensive photoevaporation should have concluded. We
detected a tentative phase curve variation (3$\sigma$) and a secondary eclipse
(2$\sigma$) in TESS photometry, which if confirmed could indicate the presence
of a high-mean-molecular-weight atmosphere. We recommend additional optical and
infrared observations to confirm the presence of an atmosphere and investigate
its composition.</description><subject>Physics - Earth and Planetary Astrophysics</subject><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><sourceid>GOX</sourceid><recordid>eNotkM1Kw0AUhbNxIdUHcOVddDtxkswk6TLU_mGLxUR0IYRJc9MMTjNlZlrMu_iwxiocOHAWH4fP8-4C6rOUc_ogzJc8-yGjoU8TxoNr77toEYpZnpMn3H1CfjJn7H14X618yOARO4sQ-Cm8jMsPfVQnO4ZX5YwgeauNI1s0UtewVaJDB1ttraxUD1Mlu_0QcBoELOW-JRsUHdlohbuTEoa84TA6yNxB22OLBiFrHBpww525NNbBojc33lUjlMXb_x55xXxWTJdk_bxYTbM1EXESEBazKuI04nEgWBTSADkNJ3VVJ6zhrErDNMUJC3comriO4qRhacQYFSEP-AQZRiPv_g970VMejTwI05e_msqLpugHLo5gmg</recordid><startdate>20240212</startdate><enddate>20240212</enddate><creator>Rubenzahl, Ryan A</creator><creator>Dai, Fei</creator><creator>Howard, Andrew W</creator><creator>Lissauer, Jack J</creator><creator>Van Zandt, Judah</creator><creator>Beard, Corey</creator><creator>Giacalone, Steven</creator><creator>Murphy, Joseph M. 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Akana</au><au>Chontos, Ashley</au><au>Lubin, Jack</au><au>Brinkman, Casey</au><au>Tyler, Dakotah</au><au>MacDougall, Mason G</au><au>Rice, Malena</au><au>Dalba, Paul A</au><au>Mayo, Andrew W</au><au>Weiss, Lauren M</au><au>Polanski, Alex S</au><au>Blunt, Sarah</au><au>Yee, Samuel W</au><au>Hill, Michelle L</au><au>Angelo, Isabel</au><au>Turtelboom, Emma V</au><au>Holcomb, Rae</au><au>Behmard, Aida</au><au>Pidhorodetska, Daria</au><au>Batahla, Natalie M</au><au>Crossfield, Ian J. M</au><au>Dressing, Courtney</au><au>Fulton, Benjamin</au><au>Huber, Daniel</au><au>Isaacson, Howard</au><au>Kane, Stephen R</au><au>Petigura, Erik A</au><au>Robertson, Paul</au><au>Scarsdale, Nicholas</au><au>Mocnik, Teo</au><au>Fetherolf, Tara</au><au>Malavolta, Luca</au><au>Mortier, Annelies</au><au>Fiorenzano, Aldo</au><au>Pedani, Marco</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The TESS-Keck Survey. XII. 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laboratories to study how exoplanets obtain, lose, retain, and/or regain
gaseous atmospheres. We present the confirmation and characterization of the
USP TOI-1347 b, a $1.8 \pm 0.1$ R$_\oplus$ planet on a 0.85 day orbit that was
detected with photometry from the TESS mission. We measured radial velocities
of the TOI-1347 system using Keck/HIRES and HARPS-N and found the USP to be
unusually massive at $11.1 \pm 1.2$ M$_\oplus$. The measured mass and radius of
TOI-1347 b imply an Earth-like bulk composition. A thin H/He envelope (>0.01%
by mass) can be ruled out at high confidence. The system is between 1 and 1.8
Gyr old; therefore, intensive photoevaporation should have concluded. We
detected a tentative phase curve variation (3$\sigma$) and a secondary eclipse
(2$\sigma$) in TESS photometry, which if confirmed could indicate the presence
of a high-mean-molecular-weight atmosphere. We recommend additional optical and
infrared observations to confirm the presence of an atmosphere and investigate
its composition.</abstract><doi>10.48550/arxiv.2402.07451</doi><oa>free_for_read</oa></addata></record> |
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| identifier | DOI: 10.48550/arxiv.2402.07451 |
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| subjects | Physics - Earth and Planetary Astrophysics |
| title | The TESS-Keck Survey. XII. A Dense 1.8 R$_\oplus$ Ultra-Short-Period Planet Possibly Clinging to a High-Mean-Molecular-Weight Atmosphere After the First Gyr |
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