A 1.55 R$_{\oplus}$ habitable-zone planet hosted by TOI-715, an M4 star near the ecliptic South Pole
peer reviewed A new generation of observatories is enabling detailed study of exoplanetary atmospheres and the diversity of alien climates, allowing us to seek evidence for extraterrestrial biological and geological processes. Now is therefore the time to identify the most unique planets to be chara...
Published in: | Monthly Notices of the Royal Astronomical Society |
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Language: | English |
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Oxford University Press (OUP)
2023
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Online Access: | https://orbi.uliege.be/handle/2268/307270 https://orbi.uliege.be/bitstream/2268/307270/1/TOI-715.pdf https://doi.org/10.1093/mnras/stad1439 |
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ftorbi:oai:orbi.ulg.ac.be:2268/307270 2024-10-13T14:10:51+00:00 A 1.55 R$_{\oplus}$ habitable-zone planet hosted by TOI-715, an M4 star near the ecliptic South Pole Dransfield, Georgina Timmermans, Mathilde Amaury H. M. J. Triaud, Dévora-Pajares, Martín Aganze, Christian Barkaoui, Khalid Burgasser, Adam J. Collins, Karen A. Cointepas, Marion Ducrot, Elsa Günther, Maximilian N. Howell, Steve B. Murray, Catriona A. Niraula, Prajwal Rackham, Benjamin V. Sebastian, Daniel Stassun, Keivan G. Zúñiga Fernández, Sebastián Gaspar Manuel Almenara, José Bonfils, Xavier Bouchy, François Burke, Christopher J. Charbonneau, David Christiansen, Jessie L. Delrez, Laetitia Gan, Tianjun Garcia, Lionel Gillon, Michaël Gómez Maqueo Chew, Yilen Hesse, Katharine M. Hooton, Matthew J. Isopi, Giovanni Jehin, Emmanuel Jenkins, Jon M. Latham, David W. Mallia, Franco Murgas, Felipe Pedersen, Peter P. Pozuelos, Francisco J. Queloz, Didier Rodriguez, David R. Schanche, Nicole Seager, Sara Srdoc, Gregor Stockdale, Chris Twicken, Joseph D. Vanderspek, Roland Wells, Robert Winn, Joshua N. de Wit, Julien Zapparata, Aldo 2023-05 https://orbi.uliege.be/handle/2268/307270 https://orbi.uliege.be/bitstream/2268/307270/1/TOI-715.pdf https://doi.org/10.1093/mnras/stad1439 en eng Oxford University Press (OUP) https://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stad1439/50391388/stad1439.pdf urn:issn:0035-8711 urn:issn:1365-2966 https://orbi.uliege.be/handle/2268/307270 info:hdl:2268/307270 doi:10.1093/mnras/stad1439 arXiV:2305.06206v1 open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess Monthly Notices of the Royal Astronomical Society (2023-05) astro-ph.EP Space and Planetary Science Astronomy and Astrophysics Physical chemical mathematical & earth Sciences Space science astronomy & astrophysics Physique chimie mathématiques & sciences de la terre Aérospatiale astronomie & astrophysique journal article http://purl.org/coar/resource_type/c_6501 info:eu-repo/semantics/article peer reviewed 2023 ftorbi https://doi.org/10.1093/mnras/stad1439 2024-09-27T07:02:01Z peer reviewed A new generation of observatories is enabling detailed study of exoplanetary atmospheres and the diversity of alien climates, allowing us to seek evidence for extraterrestrial biological and geological processes. Now is therefore the time to identify the most unique planets to be characterised with these instruments. In this context, we report on the discovery and validation of TOI-715 b, a $R_{\rm b}=1.55\pm 0.06\rm R_{\oplus}$ planet orbiting its nearby ($42$ pc) M4 host (TOI-715/TIC 271971130) with a period $P_{\rm b} = 19.288004_{-0.000024}^{+0.000027}$ days. TOI-715 b was first identified by TESS and validated using ground-based photometry, high-resolution imaging and statistical validation. The planet's orbital period combined with the stellar effective temperature $T_{\rm eff}=3075\pm75~\rm K$ give this planet an instellation $S_{\rm b} = 0.67_{-0.20}^{+0.15}~\rm S_\oplus$, placing it within the most conservative definitions of the habitable zone for rocky planets. TOI-715 b's radius falls exactly between two measured locations of the M-dwarf radius valley; characterising its mass and composition will help understand the true nature of the radius valley for low-mass stars. We demonstrate TOI-715 b is amenable for characterisation using precise radial velocities and transmission spectroscopy. Additionally, we reveal a second candidate planet in the system, TIC 271971130.02, with a potential orbital period of $P_{02} = 25.60712_{-0.00036}^{+0.00031}$ days and a radius of $R_{02} = 1.066\pm0.092\,\rm R_{\oplus}$, just inside the outer boundary of the habitable zone, and near a 4:3 orbital period commensurability. Should this second planet be confirmed, it would represent the smallest habitable zone planet discovered by TESS to date. Article in Journal/Newspaper South pole University of Liège: ORBi (Open Repository and Bibliography) South Pole Monthly Notices of the Royal Astronomical Society 527 1 35 52 |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
astro-ph.EP Space and Planetary Science Astronomy and Astrophysics Physical chemical mathematical & earth Sciences Space science astronomy & astrophysics Physique chimie mathématiques & sciences de la terre Aérospatiale astronomie & astrophysique |
spellingShingle |
astro-ph.EP Space and Planetary Science Astronomy and Astrophysics Physical chemical mathematical & earth Sciences Space science astronomy & astrophysics Physique chimie mathématiques & sciences de la terre Aérospatiale astronomie & astrophysique Dransfield, Georgina Timmermans, Mathilde Amaury H. M. J. Triaud, Dévora-Pajares, Martín Aganze, Christian Barkaoui, Khalid Burgasser, Adam J. Collins, Karen A. Cointepas, Marion Ducrot, Elsa Günther, Maximilian N. Howell, Steve B. Murray, Catriona A. Niraula, Prajwal Rackham, Benjamin V. Sebastian, Daniel Stassun, Keivan G. Zúñiga Fernández, Sebastián Gaspar Manuel Almenara, José Bonfils, Xavier Bouchy, François Burke, Christopher J. Charbonneau, David Christiansen, Jessie L. Delrez, Laetitia Gan, Tianjun Garcia, Lionel Gillon, Michaël Gómez Maqueo Chew, Yilen Hesse, Katharine M. Hooton, Matthew J. Isopi, Giovanni Jehin, Emmanuel Jenkins, Jon M. Latham, David W. Mallia, Franco Murgas, Felipe Pedersen, Peter P. Pozuelos, Francisco J. Queloz, Didier Rodriguez, David R. Schanche, Nicole Seager, Sara Srdoc, Gregor Stockdale, Chris Twicken, Joseph D. Vanderspek, Roland Wells, Robert Winn, Joshua N. de Wit, Julien Zapparata, Aldo A 1.55 R$_{\oplus}$ habitable-zone planet hosted by TOI-715, an M4 star near the ecliptic South Pole |
topic_facet |
astro-ph.EP Space and Planetary Science Astronomy and Astrophysics Physical chemical mathematical & earth Sciences Space science astronomy & astrophysics Physique chimie mathématiques & sciences de la terre Aérospatiale astronomie & astrophysique |
description |
peer reviewed A new generation of observatories is enabling detailed study of exoplanetary atmospheres and the diversity of alien climates, allowing us to seek evidence for extraterrestrial biological and geological processes. Now is therefore the time to identify the most unique planets to be characterised with these instruments. In this context, we report on the discovery and validation of TOI-715 b, a $R_{\rm b}=1.55\pm 0.06\rm R_{\oplus}$ planet orbiting its nearby ($42$ pc) M4 host (TOI-715/TIC 271971130) with a period $P_{\rm b} = 19.288004_{-0.000024}^{+0.000027}$ days. TOI-715 b was first identified by TESS and validated using ground-based photometry, high-resolution imaging and statistical validation. The planet's orbital period combined with the stellar effective temperature $T_{\rm eff}=3075\pm75~\rm K$ give this planet an instellation $S_{\rm b} = 0.67_{-0.20}^{+0.15}~\rm S_\oplus$, placing it within the most conservative definitions of the habitable zone for rocky planets. TOI-715 b's radius falls exactly between two measured locations of the M-dwarf radius valley; characterising its mass and composition will help understand the true nature of the radius valley for low-mass stars. We demonstrate TOI-715 b is amenable for characterisation using precise radial velocities and transmission spectroscopy. Additionally, we reveal a second candidate planet in the system, TIC 271971130.02, with a potential orbital period of $P_{02} = 25.60712_{-0.00036}^{+0.00031}$ days and a radius of $R_{02} = 1.066\pm0.092\,\rm R_{\oplus}$, just inside the outer boundary of the habitable zone, and near a 4:3 orbital period commensurability. Should this second planet be confirmed, it would represent the smallest habitable zone planet discovered by TESS to date. |
format |
Article in Journal/Newspaper |
author |
Dransfield, Georgina Timmermans, Mathilde Amaury H. M. J. Triaud, Dévora-Pajares, Martín Aganze, Christian Barkaoui, Khalid Burgasser, Adam J. Collins, Karen A. Cointepas, Marion Ducrot, Elsa Günther, Maximilian N. Howell, Steve B. Murray, Catriona A. Niraula, Prajwal Rackham, Benjamin V. Sebastian, Daniel Stassun, Keivan G. Zúñiga Fernández, Sebastián Gaspar Manuel Almenara, José Bonfils, Xavier Bouchy, François Burke, Christopher J. Charbonneau, David Christiansen, Jessie L. Delrez, Laetitia Gan, Tianjun Garcia, Lionel Gillon, Michaël Gómez Maqueo Chew, Yilen Hesse, Katharine M. Hooton, Matthew J. Isopi, Giovanni Jehin, Emmanuel Jenkins, Jon M. Latham, David W. Mallia, Franco Murgas, Felipe Pedersen, Peter P. Pozuelos, Francisco J. Queloz, Didier Rodriguez, David R. Schanche, Nicole Seager, Sara Srdoc, Gregor Stockdale, Chris Twicken, Joseph D. Vanderspek, Roland Wells, Robert Winn, Joshua N. de Wit, Julien Zapparata, Aldo |
author_facet |
Dransfield, Georgina Timmermans, Mathilde Amaury H. M. J. Triaud, Dévora-Pajares, Martín Aganze, Christian Barkaoui, Khalid Burgasser, Adam J. Collins, Karen A. Cointepas, Marion Ducrot, Elsa Günther, Maximilian N. Howell, Steve B. Murray, Catriona A. Niraula, Prajwal Rackham, Benjamin V. Sebastian, Daniel Stassun, Keivan G. Zúñiga Fernández, Sebastián Gaspar Manuel Almenara, José Bonfils, Xavier Bouchy, François Burke, Christopher J. Charbonneau, David Christiansen, Jessie L. Delrez, Laetitia Gan, Tianjun Garcia, Lionel Gillon, Michaël Gómez Maqueo Chew, Yilen Hesse, Katharine M. Hooton, Matthew J. Isopi, Giovanni Jehin, Emmanuel Jenkins, Jon M. Latham, David W. Mallia, Franco Murgas, Felipe Pedersen, Peter P. Pozuelos, Francisco J. Queloz, Didier Rodriguez, David R. Schanche, Nicole Seager, Sara Srdoc, Gregor Stockdale, Chris Twicken, Joseph D. Vanderspek, Roland Wells, Robert Winn, Joshua N. de Wit, Julien Zapparata, Aldo |
author_sort |
Dransfield, Georgina |
title |
A 1.55 R$_{\oplus}$ habitable-zone planet hosted by TOI-715, an M4 star near the ecliptic South Pole |
title_short |
A 1.55 R$_{\oplus}$ habitable-zone planet hosted by TOI-715, an M4 star near the ecliptic South Pole |
title_full |
A 1.55 R$_{\oplus}$ habitable-zone planet hosted by TOI-715, an M4 star near the ecliptic South Pole |
title_fullStr |
A 1.55 R$_{\oplus}$ habitable-zone planet hosted by TOI-715, an M4 star near the ecliptic South Pole |
title_full_unstemmed |
A 1.55 R$_{\oplus}$ habitable-zone planet hosted by TOI-715, an M4 star near the ecliptic South Pole |
title_sort |
1.55 r$_{\oplus}$ habitable-zone planet hosted by toi-715, an m4 star near the ecliptic south pole |
publisher |
Oxford University Press (OUP) |
publishDate |
2023 |
url |
https://orbi.uliege.be/handle/2268/307270 https://orbi.uliege.be/bitstream/2268/307270/1/TOI-715.pdf https://doi.org/10.1093/mnras/stad1439 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
Monthly Notices of the Royal Astronomical Society (2023-05) |
op_relation |
https://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stad1439/50391388/stad1439.pdf urn:issn:0035-8711 urn:issn:1365-2966 https://orbi.uliege.be/handle/2268/307270 info:hdl:2268/307270 doi:10.1093/mnras/stad1439 arXiV:2305.06206v1 |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1093/mnras/stad1439 |
container_title |
Monthly Notices of the Royal Astronomical Society |
container_volume |
527 |
container_issue |
1 |
container_start_page |
35 |
op_container_end_page |
52 |
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1812818385933697024 |