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Parijat Thakur, Vineet Kumar Mannaday, Ing-Guey Jiang, Devendra Kumar Sahu & Swadesh Chand

Investigating Extra-solar Planetary System Qatar-1 through Transit Observations

(Volume 87 - Année 2018 — Actes de colloques — First Belgo-Indian Network for Astronomy & Astrophysics (BINA) workshop - November 2016 - Nainital, India)
DOI: 10.25518/0037-9565.7577
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Mots-clés : astronomie, astrophysique exoplanètes, transits

Abstract

We report the results of the transit timing variation (TTV) analysis of the extra-solar planet Qatar-1b using thirty eight light curves. Our analysis combines thirty five previously available transit light curves with three new transits observed by us between June 2016 and September 2016 using the 2-m Himalayan Chandra Telescope (HCT) at the Indian Astronomical Observatory (Hanle, India). From these transit data, the physical and orbital parameters of the Qatar-1 system are determined. In addition to this, the ephemeris for the orbital period and mid-transit time are refined to investigate the possible TTV. We find that the null-TTV model provides the better fit to the (O-C) data. This indicates that there is no evidence for TTVs to confirm the presence of additional planets in the Qatar-1 system. The use of the 3.6-m Devasthal Optical Telescope (DOT) operated by the Aryabhatta Research Institute of Observational Sciences (ARIES, Nainital, India) could improve the photometric precision to examine the signature of TTVs in this system with a greater accuracy than in the present work.

Keywords : astronomy, astrophysics, exoplanets, transits

Pour citer cet article

Parijat Thakur, Vineet Kumar Mannaday, Ing-Guey Jiang, Devendra Kumar Sahu & Swadesh Chand, «Investigating Extra-solar Planetary System Qatar-1 through Transit Observations», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 87 - Année 2018, Actes de colloques, First Belgo-Indian Network for Astronomy & Astrophysics (BINA) workshop - November 2016 - Nainital, India, 132 - 136 URL : https://popups.uliege.be/0037-9565/index.php?id=7577.

A propos de : Parijat Thakur

Department of Pure & Applied Physics, Guru Ghasidas Central University, Bilaspur (C.G.) 495 009, India, parijat@associates.iucaa.in

A propos de : Vineet Kumar Mannaday

Department of Pure & Applied Physics, Guru Ghasidas Central University, Bilaspur (C.G.) 495 009, India

A propos de : Ing-Guey Jiang

Department of Physics and Institute of Astronomy, National Tsing-Hua University, Hsinchu, Taiwan

A propos de : Devendra Kumar Sahu

Indian Institute of Astrophysics, Bangalore 560 043, India

A propos de : Swadesh Chand

Department of Pure & Applied Physics, Guru Ghasidas Central University, Bilaspur (C.G.) 495 009, India