The Library
The EBLM project X. benchmark masses, radii and temperatures for two fully convective M-dwarfs using K2
Tools
(2023) The EBLM project X. benchmark masses, radii and temperatures for two fully convective M-dwarfs using K2. Monthly Notices of the Royal Astronomical Society, 521 (4). pp. 6305-6317. doi:10.1093/mnras/stad452 ISSN 1745-3933.
|
PDF
WRAP-EBLM-project-X-benchmark-masses-radii-temperatures-two-fully-convective-M-dwarfs-using-K2-2023.pdf - Published Version - Requires a PDF viewer. Download (2324Kb) | Preview |
Official URL: https://doi.org/10.1093/mnras/stad452
Abstract
M-dwarfs are the most abundant stars in the galaxy and popular targets for exoplanet searches. However, their intrinsic faintness and complex spectra inhibit precise characterisation. We only know of dozens of M-dwarfs with fundamental parameters of mass, radius and effective temperature characterised to better than a few per cent. Eclipsing binaries remain the most robust means of stellar characterisation. Here we present two targets from the Eclipsing Binary Low Mass (EBLM) survey that were observed with K2: EBLM J0055-00 and EBLM J2217-04. Combined with HARPS and CORALIE spectroscopy, we measure M-dwarf masses with precisions better than 5%, radii better than 3% and effective temperatures on order 1%. However, our fits require invoking a model to derive parameters for the primary star and fitting the M-dwarf using the transit and radial velocity observations. By investigating three popular stellar models, we determine that the model uncertainty in the primary star is of similar magnitude to the statistical uncertainty in the model fits of the secondary M-dwarf. Therefore, whilst these can be considered benchmark M-dwarfs, we caution the community to consider model uncertainty when pushing the limits of precise stellar characterisation.
Item Type: | Journal Article | ||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Subjects: | Q Science > QB Astronomy | ||||||||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||||||||||
SWORD Depositor: | Library Publications Router | ||||||||||||||||||
Library of Congress Subject Headings (LCSH): | Dwarf stars, Low mass stars, M stars -- Motion in line of sight , Astronomical photometry, Eclipsing binaries | ||||||||||||||||||
Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||||||||||||||||
Publisher: | Oxford University Press | ||||||||||||||||||
ISSN: | 1745-3933 | ||||||||||||||||||
Official Date: | 24 February 2023 | ||||||||||||||||||
Dates: |
|
||||||||||||||||||
Volume: | 521 | ||||||||||||||||||
Number: | 4 | ||||||||||||||||||
Page Range: | pp. 6305-6317 | ||||||||||||||||||
DOI: | 10.1093/mnras/stad452 | ||||||||||||||||||
Status: | Peer Reviewed | ||||||||||||||||||
Publication Status: | Published | ||||||||||||||||||
Reuse Statement (publisher, data, author rights): | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society All rights reserved. | ||||||||||||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||||||||||||
Date of first compliant deposit: | 18 July 2023 | ||||||||||||||||||
Date of first compliant Open Access: | 19 July 2023 | ||||||||||||||||||
RIOXX Funder/Project Grant: |
|
||||||||||||||||||
Related URLs: |
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |
Downloads
Downloads per month over past year