A super-Earth orbiting near the inner edge of the habitable zone around the M4.5 dwarf Ross 508-Reference-Cited by-同舟云学术

A super-Earth orbiting near the inner edge of the habitable zone around the M4.5 dwarf Ross 508

Published:2022-06-30 Issue:4 Volume:74 Page:904-922
ISSN:0004-6264
Container-title:Publications of the Astronomical Society of Japan
language:en
Short-container-title:

Author:

Harakawa Hiroki¹^ORCID,Takarada Takuya²³,Kasagi Yui⁴,Hirano Teruyuki²³⁴,Kotani Takayuki²³⁴,Kuzuhara Masayuki²³,Omiya Masashi²³,Kawahara Hajime⁵,Fukui Akihiko⁶^ORCID,Hori Yasunori²³,Ishikawa Hiroyuki Tako²³,Ogihara Masahiro³⁷⁸,Livingston John²³⁹,Brandt Timothy D¹⁰,Currie Thayne¹¹¹¹²,Aoki Wako³^ORCID,Beichman Charles A¹³¹⁴,Henning Thomas¹⁵,Hodapp Klaus¹⁶,Ishizuka Masato⁹,Izumiura Hideyuki¹⁷,Jacobson Shane¹⁶,Janson Markus¹⁸,Kambe Eiji¹,Kodama Takanori⁶,Kokubo Eiichiro³,Konishi Mihoko¹⁹,Krishnamurthy Vigneshwaran²³,Kudo Tomoyuki¹,Kurokawa Takashi²²⁰,Kusakabe Nobuhiko²³,Kwon Jungmi⁹,Matsumoto Yuji³^ORCID,McElwain Michael W²¹,Mitsui Koyu⁹,Nakagawa Takao²²,Narita Norio²⁶²³,Nishikawa Jun³⁴,Nugroho Stevanus K²³,Serabyn Eugene²⁴,Serizawa Takuma³²⁰,Takahashi Aoi²³,Ueda Akitoshi²³⁴,Uyama Taichi³¹³¹⁴,Vievard Sébastien¹²,Wang Ji²⁵,Wisniewski John²⁶,Tamura Motohide²³⁹,Sato Bun’ei²⁷

Affiliation:

1. Subaru Telescope , 650 North A’ohoku Place, Hilo, HI 96720, USA

2. Astrobiology Center , 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan

3. National Astronomical Observatory of Japan , 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan

4. Department of Astronomical Science, The Graduate University for Advanced Studies , SOKENDAI, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan

5. Department of Earth and Planetary Sciences, Graduate School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan

6. Komaba Institute for Science, The University of Tokyo , 3-8-1 Komaba, Meguro, Tokyo 153-8902, Japan

7. Tsung-Dao Lee Institute, Shanghai Jiao Tong University , 520 Shengrong Road, Shanghai 201210, China

8. Earth-Life Science Institute, Tokyo Institute of Technology , 2-12-1 Ookayama, Meguro, Tokyo 152-8550, Japan

9. Department of Astronomy, Graduate School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan

10. Department of Physics, University of California , Santa Barbara, Santa Barbara, CA 93106, USA

11. NASA-Ames Research Center , Moffett Field, CA 94035, USA

12. Eureka Scientific , Oakland, 10 CA, USA

13. Infrared Processing and Analysis Center, California Institute of Technology , 1200 E. California Boulevard, Pasadena, CA 91125, USA

14. NASA Exoplanet Science Institute , Pasadena, CA 91125, USA

15. Max-Planck-Institut für Astronomie , Königstuhl 17, 69117 Heidelberg, Germany

16. University of Hawaii, Institute for Astronomy , 640 N. A’ohoku Place, Hilo, HI 96720, USA

17. Okayama Branch, Subaru Telescope, National Astronomical Observatory of Japan, National Institute of Natural Sciences , Kamogata, Asakuchi, Okayama 719-0232, Japan

18. Department of Astronomy, Stockholm University , SE-10691, Stockholm, Sweden

19. Faculty of Science and Technology, Oita University , 700 Dannoharu, Oita, Oita 870-1192, Japan

20. Institute of Engineering, Tokyo University of Agriculture and Technology , 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan

21. Exoplanets and Stellar Astrophysics Laboratory , NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA

22. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency , 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan

23. Instituto de Astrofísica de Canarias (IAC) , 38205 La Laguna, Tenerife, Spain

24. Jet Propulsion Laboratory, California Institute of Technology , Pasadena, CA 91109, USA

25. Department of Astronomy, The Ohio State University , 100 W 18th Ave, Columbus, OH 43210, USA

26. Department of Physics and Astronomy, University of Oklahoma , 440 West Brooks Street, Norman, OK 73019, USA

27. Department of Earth and Planetary Sciences, Tokyo Institute of Technology , 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan

Abstract

Abstract We report the near-infrared radial velocity (RV) discovery of a super-Earth planet on a 10.77 d orbit around the M4.5 dwarf Ross 508 (Jmag = 9.1). Using precision RVs from the Subaru Telescope IRD (InfraRed Doppler) instrument, we derive a semi-amplitude of $3.92^{+0.60}_{-0.58}\:\mbox{m}\:{\mbox{s}^{-1}}$, corresponding to a planet with a minimum mass $m \sin i = 4.00^{+0.53}_{-0.55}\, M_{\oplus }$. We find no evidence of significant signals at the detected period in spectroscopic stellar activity indicators or MEarth photometry. The planet, Ross 508 b, has a semi-major axis of $0.05366^{+0.00056}_{-0.00049}\:$au. This gives an orbit-averaged insolation of ≈1.4 times the Earth’s value, placing Ross 508 b near the inner edge of its star’s habitable zone. We have explored the possibility that the planet has a high eccentricity and its host is accompanied by an additional unconfirmed companion on a wide orbit. Our discovery demonstrates that the near-infrared RV search can play a crucial role in finding a low-mass planet around cool M dwarfs like Ross 508.

Funder

National Astronomical Observatory of Japan

Japan Society for the Promotion of Science

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

Link

https://academic.oup.com/pasj/article-pdf/74/4/904/45253769/psac044.pdf

Reference65 articles.

1. A new look at the statistical model identification

2. A terrestrial planet candidate in a temperate orbit around Proxima Centauri