π Earth: A 3.14 day Earth-sized Planet from K2's Kitchen Served Warm by the SPECULOOS Team

Niraula, Prajwal; Wit, Julien de; Rackham, Benjamin V.; Ducrot, Elsa; Burdanov, Artem; Crossfield, Ian J. M.; Grootel, Valérie Van; Murray, Catriona; Garcia, Lionel J.; Alonso, Roi; Beard, Corey; Maqueo Chew, Yilen Gómez; Delrez, Laetitia; Demory, Brice-Olivier; Fulton, Benjamin J.; Gillon, Michaël; Günther, Maximilian N.; Howard, Andrew W.; Issacson, Howard; Jehin, Emmanuël; ... (2020). π Earth: A 3.14 day Earth-sized Planet from K2's Kitchen Served Warm by the SPECULOOS Team. The astronomical journal, 160(4), p. 172. American Astronomical Society 10.3847/1538-3881/aba95f

[img]
Preview
Text
2006.07308.pdf - Accepted Version
Available under License Publisher holds Copyright.

Download (1MB) | Preview
[img] Text
Niraula_2020_AJ_160_172.pdf - Published Version
Restricted to registered users only
Available under License Publisher holds Copyright.

Download (12MB) | Request a copy

We report on the discovery of a transiting Earth-sized (0.95R⊕) planet around an M3.5 dwarf star at 57 pc, EPIC 249631677. The planet has a period of ~3.14 days, i.e., ~π, with an installation of 7.45 S⊕. The detection was made using publicly available data from K2's Campaign 15. We observed three additional transits with SPECULOOS Southern and Northern Observatories, and a stellar spectrum from Keck/HIRES, which allowed us to validate the planetary nature of the signal. The confirmed planet is well suited for comparative terrestrial exoplanetology. While exoplanets transiting ultracool dwarfs present the best opportunity for atmospheric studies of terrestrial exoplanets with the James Webb Space Telescope, those orbiting mid-M dwarfs within 100 pc such as EPIC 249631677b will become increasingly accessible with the next generation of observatories.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Center for Space and Habitability (CSH)

UniBE Contributor:

Demory, Brice-Olivier

Subjects:

500 Science
500 Science > 520 Astronomy
500 Science > 530 Physics

ISSN:

0004-6256

Publisher:

American Astronomical Society

Language:

English

Submitter:

Danielle Zemp

Date Deposited:

13 Apr 2021 14:53

Last Modified:

22 Sep 2021 02:30

Publisher DOI:

10.3847/1538-3881/aba95f

BORIS DOI:

10.48350/154811

URI:

https://boris.unibe.ch/id/eprint/154811

Actions (login required)

Edit item Edit item
Provide Feedback