X-Ray Emission from the Exoplanet Hosting LTT 1445 Triple Star System
نویسندگان
چکیده
JWST will be able to observe the atmospheres of rocky planets transiting nearby M dwarfs. The dwarf triple star system LTT 1445, at a distance 6.86 pc, hosts some nearest terrestrial planets. These most likely orbit 3.5V 1445A. During 28.6 ksec Chandra ACIS-S3 observation we have i) spatially resolved and detected all three stars in 1445 system, ii) measured X-ray luminosity individual stars, including 1445A, for first time, iii) studied flux variability sources found strong from A C components, iv) investigated how coronal luminosities, temperatures volume emission measures vary different activity levels. Combining these data with upcoming HST ultraviolet observations allow differential measure (DEM) estimation star's EUV spectrum, thereby facilitating modeling planets' atmospheres.
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ژورنال
عنوان ژورنال: The Astronomical Journal
سال: 2022
ISSN: ['1538-3881', '0004-6256']
DOI: https://doi.org/10.3847/1538-3881/ac8f25