Three temperate Neptunes orbiting nearby stars
Article
Article Title | Three temperate Neptunes orbiting nearby stars |
---|---|
ERA Journal ID | 1057 |
Article Category | Article |
Authors | Fulton, Benjamin J. (Author), Howard, Andrew W. (Author), Weiss, Lauren M. (Author), Sinukoff, Evan (Author), Petigura, Erik A. (Author), Isaacson, Howard (Author), Hirsch, Lea (Author), Marcy, Geoffrey W. (Author), Henry, Gregory W. (Author), Grunblatt, Samuel K. (Author), Huber, Daniel (Author), von Braun, Kaspar (Author), Boyajian, Tabetha S. (Author), Kane, Stephen R. (Author), Wittrock, Justin (Author), Horch, Elliott P. (Author), Ciardi, David R. (Author), Howell, Steve B. (Author), Wright, Jason T. (Author) and Ford, Eric B. (Author) |
Journal Title | The Astrophysical Journal: an international review of astronomy and astronomical physics |
Journal Citation | 830 (1), pp. 46-64 |
Article Number | 46 |
Number of Pages | 19 |
Year | 2016 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-637X |
1538-4357 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/0004-637X/830/1/46 |
Web Address (URL) | http://iopscience.iop.org/article/10.3847/0004-637X/830/1/46 |
Abstract | We present the discovery of three modestly irradiated, roughly Neptune-mass planets orbiting three nearby Solartype stars. HD 42618 b has a minimum mass of 15.4±2.4 M⊕, a semimajor axis of 0.55 au, an equilibrium temperature of 337 K, and is the first planet discovered to orbit the solar analogue host star, HD 42618. We also discover new planets orbiting the known exoplanet host stars HD 164922 and HD 143761 (p CrB). The new planet orbiting HD 164922 has a minimum mass of 12.9±1.6 M⊕ and orbits interior to the previously known Jovian mass planet orbiting at 2.1 au. HD 164922 c has a semimajor axis of 0.34 au and an equilibrium temperature of 418 K. HD 143761 c orbits with a semimajor axis of 0.44 au, has a minimum mass of 25±2 M⊕, and is the warmest of the three new planets with an equilibrium temperature of 445 K. It orbits exterior to the previously known warm Jupiter in the system. A transit search using space-based CoRoT data and ground-based photometry from the Automated Photometric Telescopes (APTs) at Fairborn Observatory failed to detect any transits, but the precise, high-cadence APT photometry helped to disentangle planetary-reflex motion from stellar activity. These planets were discovered as part of an ongoing radial velocity survey of bright, nearby, chromospherically inactive stars using the Automated Planet Finder (APF) telescope at Lick Observatory. The high-cadence APF data combined with nearly two decades of radial velocity data from Keck Observatory and gives unprecedented sensitivity to both short-period low-mass, and long-period intermediate-mass planets. |
Keywords | planetary systems; stars: individual (HD 42618, HD 164922, HD 143761) |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | For access to this article, please click on the URL link provided. |
Byline Affiliations | University of Hawaii, United States |
University of California, United States | |
California Institute of Technology (Caltech), United States | |
Tennessee State University, United States | |
University of Sydney | |
Lowell Observatory, United States | |
Yale University, United States | |
San Francisco State University, United States | |
Southern Connecticut State University, United States | |
National Aeronautics and Space Administration (NASA), United States | |
Pennsylvania State University, United States | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q42z4/three-temperate-neptunes-orbiting-nearby-stars
1213
total views111
total downloads1
views this month0
downloads this month