A second planet transiting LTT 1445A and a determination of the masses of both worlds
LTT 1445 is a hierarchical triple M-dwarf star system located at a distance of 6.86 pc. The primary star LTT 1445A (0.257 M ⊙) is known to host the transiting planet LTT 1445Ab with an orbital period of 5.36 days, making it the second-closest known transiting exoplanet system, and the closest one fo...
Saved in:
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Article (Journal) |
| Language: | English |
| Published: |
2022 March 14
|
| In: |
The astronomical journal
Year: 2022, Volume: 163, Issue: 4, Pages: 1-18 |
| ISSN: | 1538-3881 |
| DOI: | 10.3847/1538-3881/ac50a9 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.3847/1538-3881/ac50a9
|
| Author Notes: | Jennifer G. Winters, Julian Stürmer [und weitere Verfasser] |
MARC
| LEADER | 00000caa a2200000 c 4500 | ||
|---|---|---|---|
| 001 | 1799303977 | ||
| 003 | DE-627 | ||
| 005 | 20220820164450.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 220412s2022 xx |||||o 00| ||eng c | ||
| 024 | 7 | |a 10.3847/1538-3881/ac50a9 |2 doi | |
| 035 | |a (DE-627)1799303977 | ||
| 035 | |a (DE-599)KXP1799303977 | ||
| 035 | |a (OCoLC)1341458907 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rda | ||
| 041 | |a eng | ||
| 084 | |a 29 |2 sdnb | ||
| 100 | 1 | |a Winters, Jennifer G. |e VerfasserIn |0 (DE-588)1255272171 |0 (DE-627)1799360342 |4 aut | |
| 245 | 1 | 2 | |a A second planet transiting LTT 1445A and a determination of the masses of both worlds |c Jennifer G. Winters, Julian Stürmer [und weitere Verfasser] |
| 264 | 1 | |c 2022 March 14 | |
| 300 | |a 18 | ||
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a Computermedien |b c |2 rdamedia | ||
| 338 | |a Online-Ressource |b cr |2 rdacarrier | ||
| 500 | |a Gesehen am 21.04.2022 | ||
| 520 | |a LTT 1445 is a hierarchical triple M-dwarf star system located at a distance of 6.86 pc. The primary star LTT 1445A (0.257 M ⊙) is known to host the transiting planet LTT 1445Ab with an orbital period of 5.36 days, making it the second-closest known transiting exoplanet system, and the closest one for which the host is an M dwarf. Using Transiting Exoplanet Survey Satellite data, we present the discovery of a second planet in the LTT 1445 system, with an orbital period of 3.12 days. We combine radial-velocity measurements obtained from the five spectrographs, Echelle Spectrograph for Rocky Exoplanets and Stable Spectroscopic Observations, High Accuracy Radial Velocity Planet Searcher, High-Resolution Echelle Spectrometer, MAROON-X, and Planet Finder Spectrograph to establish that the new world also orbits LTT 1445A. We determine the mass and radius of LTT 1445Ab to be 2.87 ± 0.25 M ⊕ and R ⊕, consistent with an Earth-like composition. For the newly discovered LTT 1445Ac, we measure a mass of M ⊕ and a minimum radius of 1.15 R ⊕, but we cannot determine the radius directly as the signal-to-noise ratio of our light curve permits both grazing and nongrazing configurations. Using MEarth photometry and ground-based spectroscopy, we establish that star C (0.161 M ⊙) is likely the source of the 1.4 day rotation period, and star B (0.215 M ⊙) has a likely rotation period of 6.7 days. We estimate a probable rotation period of 85 days for LTT 1445A. Thus, this triple M-dwarf system appears to be in a special evolutionary stage where the most massive M dwarf has spun down, the intermediate mass M dwarf is in the process of spinning down, while the least massive stellar component has not yet begun to spin down. | ||
| 700 | 1 | |a Stürmer, Julian |e VerfasserIn |0 (DE-588)1068239018 |0 (DE-627)819823244 |0 (DE-576)427495105 |4 aut | |
| 700 | 1 | |a Cloutier, Ryan |e VerfasserIn |4 aut | |
| 700 | 1 | |a Medina, Amber A. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Irwin, Jonathan M. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Charbonneau, David |e VerfasserIn |4 aut | |
| 700 | 1 | |a Astudillo-Defru, Nicola |e VerfasserIn |4 aut | |
| 700 | 1 | |a Bonfils, Xavier |e VerfasserIn |4 aut | |
| 700 | 1 | |a Howard, Andrew W. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Isaacson, Howard |e VerfasserIn |4 aut | |
| 700 | 1 | |a Bean, Jacob L. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Seifahrt, Andreas |e VerfasserIn |4 aut | |
| 700 | 1 | |a Teske, Johanna K. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Eastman, Jason D. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Twicken, Joseph D. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Collins, Karen A. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Jensen, Eric L. N. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Quinn, Samuel N. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Payne, Matthew J. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Kristiansen, Martti H. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Spencer, Alton |e VerfasserIn |4 aut | |
| 700 | 1 | |a Vanderburg, Andrew |e VerfasserIn |4 aut | |
| 700 | 1 | |a Zechmeister, Mathias |e VerfasserIn |4 aut | |
| 700 | 1 | |a Weiss, Lauren M. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Wang, Sharon Xuesong |e VerfasserIn |4 aut | |
| 700 | 1 | |a Wang, Gavin |e VerfasserIn |4 aut | |
| 700 | 1 | |a Udry, Stéphane |e VerfasserIn |4 aut | |
| 700 | 1 | |a Terentev, Ivan A. |e VerfasserIn |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t The astronomical journal |d Washington, DC : AAS Publishing, American Astronomical Society, 1998 |g 163(2022), 4, Artikel-ID 168, Seite 1-18 |w (DE-627)312175647 |w (DE-600)2003104-X |w (DE-576)090883306 |x 1538-3881 |7 nnas |a A second planet transiting LTT 1445A and a determination of the masses of both worlds |
| 773 | 1 | 8 | |g volume:163 |g year:2022 |g number:4 |g elocationid:168 |g pages:1-18 |g extent:18 |a A second planet transiting LTT 1445A and a determination of the masses of both worlds |
| 856 | 4 | 0 | |u https://doi.org/10.3847/1538-3881/ac50a9 |x Verlag |x Resolving-System |z lizenzpflichtig |3 Volltext |
| 951 | |a AR | ||
| 992 | |a 20220412 | ||
| 993 | |a Article | ||
| 994 | |a 2022 | ||
| 998 | |g 1068239018 |a Stürmer, Julian |m 1068239018:Stürmer, Julian |d 700000 |d 714000 |d 714300 |e 700000PS1068239018 |e 714000PS1068239018 |e 714300PS1068239018 |k 0/700000/ |k 1/700000/714000/ |k 2/700000/714000/714300/ |p 28 | ||
| 999 | |a KXP-PPN1799303977 |e 4116731617 | ||
| BIB | |a Y | ||
| SER | |a journal | ||
| JSO | |a {"title":[{"title_sort":"second planet transiting LTT 1445A and a determination of the masses of both worlds","title":"A second planet transiting LTT 1445A and a determination of the masses of both worlds"}],"language":["eng"],"name":{"displayForm":["Jennifer G. Winters, Julian Stürmer [und weitere Verfasser]"]},"origin":[{"dateIssuedDisp":"2022 March 14","dateIssuedKey":"2022"}],"recId":"1799303977","person":[{"family":"Winters","display":"Winters, Jennifer G.","given":"Jennifer G.","role":"aut"},{"role":"aut","family":"Stürmer","display":"Stürmer, Julian","given":"Julian"},{"family":"Cloutier","display":"Cloutier, Ryan","given":"Ryan","role":"aut"},{"role":"aut","family":"Medina","display":"Medina, Amber A.","given":"Amber A."},{"given":"Jonathan M.","display":"Irwin, Jonathan M.","family":"Irwin","role":"aut"},{"family":"Charbonneau","display":"Charbonneau, David","given":"David","role":"aut"},{"role":"aut","display":"Astudillo-Defru, Nicola","given":"Nicola","family":"Astudillo-Defru"},{"given":"Xavier","display":"Bonfils, Xavier","family":"Bonfils","role":"aut"},{"role":"aut","given":"Andrew W.","display":"Howard, Andrew W.","family":"Howard"},{"display":"Isaacson, Howard","given":"Howard","family":"Isaacson","role":"aut"},{"family":"Bean","given":"Jacob L.","display":"Bean, Jacob L.","role":"aut"},{"family":"Seifahrt","display":"Seifahrt, Andreas","given":"Andreas","role":"aut"},{"family":"Teske","display":"Teske, Johanna K.","given":"Johanna K.","role":"aut"},{"role":"aut","given":"Jason D.","display":"Eastman, Jason D.","family":"Eastman"},{"role":"aut","display":"Twicken, Joseph D.","given":"Joseph D.","family":"Twicken"},{"role":"aut","family":"Collins","display":"Collins, Karen A.","given":"Karen A."},{"role":"aut","family":"Jensen","display":"Jensen, Eric L. N.","given":"Eric L. N."},{"role":"aut","family":"Quinn","display":"Quinn, Samuel N.","given":"Samuel N."},{"family":"Payne","display":"Payne, Matthew J.","given":"Matthew J.","role":"aut"},{"role":"aut","display":"Kristiansen, Martti H.","given":"Martti H.","family":"Kristiansen"},{"given":"Alton","display":"Spencer, Alton","family":"Spencer","role":"aut"},{"given":"Andrew","display":"Vanderburg, Andrew","family":"Vanderburg","role":"aut"},{"role":"aut","display":"Zechmeister, Mathias","given":"Mathias","family":"Zechmeister"},{"role":"aut","given":"Lauren M.","display":"Weiss, Lauren M.","family":"Weiss"},{"role":"aut","display":"Wang, Sharon Xuesong","given":"Sharon Xuesong","family":"Wang"},{"role":"aut","display":"Wang, Gavin","given":"Gavin","family":"Wang"},{"display":"Udry, Stéphane","given":"Stéphane","family":"Udry","role":"aut"},{"role":"aut","given":"Ivan A.","display":"Terentev, Ivan A.","family":"Terentev"}],"note":["Gesehen am 21.04.2022"],"relHost":[{"part":{"text":"163(2022), 4, Artikel-ID 168, Seite 1-18","volume":"163","year":"2022","pages":"1-18","extent":"18","issue":"4"},"id":{"eki":["312175647"],"issn":["1538-3881"],"zdb":["2003104-X"]},"note":["Gesehen am 13.12.2023","Fortsetzung der Druck-Ausgabe"],"origin":[{"publisherPlace":"Washington, DC ; Chicago, Ill. ; London","dateIssuedKey":"1998","dateIssuedDisp":"1998-","publisher":"AAS Publishing, American Astronomical Society ; Univ. of Chicago Press, Journals Division ; Institute of Physics Publ."}],"title":[{"title_sort":"astronomical journal","title":"The astronomical journal"}],"type":{"bibl":"periodical","media":"Online-Ressource"},"pubHistory":["Nachgewiesen 115.1998 - ; auch mit durchgehender Nr.-Zählung"],"disp":"A second planet transiting LTT 1445A and a determination of the masses of both worldsThe astronomical journal","recId":"312175647","titleAlt":[{"title":"AJ electronic edition"}],"language":["eng"]}],"id":{"doi":["10.3847/1538-3881/ac50a9"],"eki":["1799303977"]},"type":{"media":"Online-Ressource","bibl":"article-journal"},"physDesc":[{"extent":"18 S."}]} | ||
| SRT | |a WINTERSJENSECONDPLAN2022 | ||