Lalitha, S. ; Poppenhaeger, K. ; Singh, K. P. ; Czesla, S. ; Schmitt, J. H. M. M. (2014) X-ray emission from the super-earth host GJ 1214 The Astrophysical Journal, 790 (1). L11. ISSN 0004-637X
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Official URL: http://iopscience.iop.org/article/10.1088/2041-820...
Related URL: http://dx.doi.org/10.1088/2041-8205/790/1/L11
Abstract
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 XMM-Newton observations. We derive an X-ray luminosity of LX = 7.4 × 1025 erg s–1 and a corresponding activity level of log (L X/L bol) ~ –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 1.3 × 1010 g s–1 and has lost a total of ≈2-5.6 M ⊕.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Astronomical Society. |
| ID Code: | 99139 |
| Deposited On: | 20 Oct 2015 06:44 |
| Last Modified: | 20 Oct 2015 06:44 |
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