A Statistical Search for Star-Planet Interaction in the Ultraviolet Using GALEX

Title

A Statistical Search for Star-Planet Interaction in the Ultraviolet Using GALEX

Creator

Viswanath G.; Narang M.; Manoj P.; Mathew B.; Kartha S.S.

Description

Most (?82%) of the over 4000 confirmed exoplanets known today orbit very close to their host stars, within 0.5 au. Planets at such small orbital distances can result in significant interactions with their host stars, which can induce increased activity levels in them. In this work, we have searched for statistical evidence for star-planet interactions in the ultraviolet (UV) using the largest sample of 1355 Galaxy Evolution Explorer (GALEX) detected host stars with confirmed exoplanets and making use of the improved host-star parameters from Gaia DR2. From our analysis, we do not find any significant correlation between the UV activity of the host stars and their planetary properties. We further compared the UV properties of planet host stars to that of chromospherically active stars from the RAdial Velocity Experiment (RAVE) survey. Our results indicate that the enhancement in chromospheric activity of host stars due to star-planet interactions may not be significant enough to reflect in their near- and far-UV broadband flux. 2020. The American Astronomical Society. All rights reserved..

Source

Astronomical Journal, Vol-159, No. 5

Date

2020-01-01

Publisher

Institute of Physics Publishing

Coverage

Viswanath G., Institutionen f astronomi, Stockholms universitet, Stockholm, SE-106 91, Sweden, Department of Physics and Electronics, CHRIST (Deemed to be University), Bangalore, 560029, India, Department of Astronomy and Astrophysics, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai, 400005, India; Narang M., Department of Astronomy and Astrophysics, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai, 400005, India; Manoj P., Department of Astronomy and Astrophysics, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai, 400005, India; Mathew B., Department of Physics and Electronics, CHRIST (Deemed to be University), Bangalore, 560029, India; Kartha S.S., Department of Physics and Electronics, CHRIST (Deemed to be University), Bangalore, 560029, India

Rights

All Open Access; Bronze Open Access; Green Open Access

Relation

ISSN: 46256

Format

Online

Language

English

Type

Article

Identifier

https://doi.org/10.3847/1538-3881/ab7d3b

https://www.scopus.com/inward/record.uri?eid=2-s2.0-85086587714&doi=10.3847%2f1538-3881%2fab7d3b&partnerID=40&md5=bc4093b2d924c0ee6fa06ee192301981