arXiv
Open Access
2014
X-ray emission from the super-Earth host GJ 1214
S. Lalitha
K. Poppenhaeger
K. P. Singh
S. Czesla
J. H. M. M. Schmitt
Abstrak
Stellar activity can produce large amounts of high-energy radiation, which is absorbed by the planetary atmosphere leading to irradiation-driven mass-loss. We present the detection and an investigation of high-energy emission in a transiting super-Earth host system, GJ 1214, based on an XMM-Newton observation. We derive an X-ray luminosity LX=7.4E25 erg/s and a corresponding activity level of log(LX/Lbol)~ -5.3. Further, we determine a coronal temperature of about -3.5 MK, which is typical for coronal emission of moderately active low-mass stars. We estimate that GJ 1214 b evaporates at a rate of 1.3E10 g/s and has lost a total of ~2-5.6 MEarth.
Topik & Kata Kunci
Penulis (5)
S
S. Lalitha
K
K. Poppenhaeger
K
K. P. Singh
S
S. Czesla
J
J. H. M. M. Schmitt
Akses Cepat
Informasi Jurnal
- Tahun Terbit
- 2014
- Bahasa
- en
- Sumber Database
- arXiv
- Akses
- Open Access ✓