A Multi-planet System Transiting the V = 9 Rapidly Rotating F-Star HD 106315

Rodriguez, Joseph E. and Zhou, George ORCID: https://orcid.org/0000-0002-4891-3517 and Vanderburg, Andrew and Eastman, Jason D. and Kreidberg, Laura and Cargile, Phillip A. and Bieryla, Allyson and Latham, David W. and Irwin, Jonathan and Mayo, Andrew W. and Calkins, Michael L. and Esquerdo, Gilbert A. and Mink, Jessica (2017) A Multi-planet System Transiting the V = 9 Rapidly Rotating F-Star HD 106315. The Astronomical Journal, 153 (6):256. pp. 1-9. ISSN 0004-6256

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We report the discovery of a multi-planet system orbiting HD 106315, a rapidly rotating mid F-type star, using data from the K2 mission. HD 106315 hosts a 2.51 ± 0.12 R ⊕ sub-Neptune in a 9.5-day orbit and a super-Neptune in a 21-day orbit. The projected rotational velocity of HD 106315 (12.9 km s-1) likely precludes precise measurements of the planets' masses but could enable a measurement of the sky-projected spin-orbit obliquity for the outer planet via Doppler tomography. The eccentricities of both planets were constrained to be consistent with 0, following a global modeling of the system that includes a Gaia distance and dynamical arguments. The HD 106315 system is one of few multi-planet systems hosting a Neptune-sized planet for which orbital obliquity measurements are possible, making it an excellent test-case for formation mechanisms of warm-Neptunian systems. The brightness of the host star also makes HD 106315 c a candidate for future transmission spectroscopic follow-up studies.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 03 Feb 2022 03:19
Last Modified: 07 Feb 2022 00:11
Uncontrolled Keywords: planetary systems; planets and satellites: detection; stars: individual (HD 106315); Astrophysics - Earth and Planetary Astrophysics; Astrophysics - Solar and Stellar Astrophysics
Fields of Research (2008): 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
Fields of Research (2020): 51 PHYSICAL SCIENCES > 5101 Astronomical sciences > 510109 Stellar astronomy and planetary systems
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Socio-Economic Objectives (2020): 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280120 Expanding knowledge in the physical sciences
Identification Number or DOI: https://doi.org/10.3847/1538-3881/aa6dfb
URI: http://eprints.usq.edu.au/id/eprint/45026

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