An enhanced slope in the transmission spectrum of the hot Jupiter WASP-104b-Reference-Cited by-同舟云学术

An enhanced slope in the transmission spectrum of the hot Jupiter WASP-104b

Published:2020-11-20 Issue:4 Volume:500 Page:5420-5435
ISSN:0035-8711
Container-title:Monthly Notices of the Royal Astronomical Society
language:en
Short-container-title:

Author:

Chen G¹^ORCID,Pallé E²³,Parviainen H²³^ORCID,Wang H⁴,van Boekel R⁵,Murgas F²³,Yan F⁶,Béjar V J S²³,Casasayas-Barris N²³,Crouzet N⁷,Esparza-Borges E³^ORCID,Fukui A²⁸,Garai Z⁹¹⁰¹¹^ORCID,Kawauchi K⁸,Kurita S⁸,Kusakabe N¹²¹³,de Leon J P¹⁴,Livingston J¹⁴^ORCID,Luque R²³^ORCID,Madrigal-Aguado A²³^ORCID,Mori M¹⁴,Narita N²¹²¹⁵¹⁶,Nishiumi T¹²¹⁷,Oshagh M²³,Sánchez-Benavente M²³,Tamura M¹²¹³¹⁴,Terada Y¹⁸¹⁹,Watanabe N¹²¹⁷

Affiliation:

1. Key Laboratory of Planetary Sciences, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023, China

2. Instituto de Astrofísica de Canarias, Vía Láctea s/n, 38205 La Laguna, Tenerife, Spain

3. Departamento de Astrofísica, Universidad de La Laguna, 38206 La Laguna,Tenerife, Spain

4. Key Laboratory of Radio Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023, China

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

6. Institut für Astrophysik, Georg-August-Universität, Friedrich-Hund-Platz 1, D-37077 Göttingen, Germany

7. Science Support Office, Directorate of Science, European Space Research and Technology Centre (ESA/ESTEC), Keplerlaan 1, NL-2201 AZ Noordwijk, the Netherlands

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

9. MTA-ELTE Exoplanet Research Group, 9700 Szombathely, Szent Imre h. u. 112, Hungary

10. ELTE Gothard Astrophysical Observatory, 9700 Szombathely, Szent Imre h. u. 112, Hungary

11. Astronomical Institute, Slovak Academy of Sciences, 05960 Tatranská Lomnica, Slovakia

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

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

14. Department of Astronomy, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan

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

16. Japan Science and Technology Agency, PRESTO, 3-8-1 Komaba, Meguro, Tokyo 153-8902, Japan

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

18. Institute of Astronomy and Astrophysics, Academia Sinica, PO Box 23-141, Taipei 10617, Taiwan

19. Department of Astrophysics, National Taiwan University, Taipei 10617, Taiwan

Abstract

ABSTRACT We present the optical transmission spectrum of the hot Jupiter WASP-104b based on one transit observed by the blue and red channels of the Double Spectrograph (DBSP) at the Palomar 200-inch telescope and 14 transits observed by the MuSCAT2 four-channel imager at the 1.52-m Telescopio Carlos Sánchez. We also analyse 45 additional K2 transits, after correcting for the flux contamination from a companion star. Together with the transit light curves acquired by DBSP and MuSCAT2, we are able to revise the system parameters and orbital ephemeris, confirming that no transit timing variations exist. Our DBSP and MuSCAT2 combined transmission spectrum reveals an enhanced slope at wavelengths shorter than 630 nm and suggests the presence of a cloud deck at longer wavelengths. While the Bayesian spectral retrieval analyses favour a hazy atmosphere, stellar spot contamination cannot be completely ruled out. Further evidence, from transmission spectroscopy and detailed characterization of the host star’s activity, is required to distinguish the physical origin of the enhanced slope.

Funder

Chinese Academy of Sciences

National Natural Science Foundation of China

Natural Science Foundation of Jiangsu Province

Ministerio de Economía y Competitividad

Japan Society for the Promotion of Science

Japan Science and Technology Corporation

Precursory Research for Embryonic Science and Technology

Vedecká Grantová Agentúra MŠVVaŠ SR a SAV

Slovenská Akadémia Vied

Publisher

Oxford University Press (OUP)