150 citations · 1.3k across the 36 of their papers we have counts for
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X-ray emission from the remarkable A-type star HR 8799
J. Robrade, J. H. M. M. Schmitt
We present a Chandra observation of the exceptional planet bearing A5V star HR 8799, more precisely classified as a kA5hF0mA5 star and search for intrinsic X-ray emission. We clear…
Coronal properties of planet-bearing stars
K. Poppenhaeger, J. Robrade, J. H. M. M. Schmitt
Do extrasolar planets affect the activity of their host stars? Indications for chromospheric activity enhancement have been found for a handful of targets, but in the X-ray regime,…
Quiescent and flaring X-ray emission from the nearby M/T dwarf binary SCR 1845-6357
J. Robrade, K. Poppenhaeger, J. H. M. M. Schmitt
We investigate an XMM-Newton observation of SCR 1845-6357, a nearby, ultracool M8.5/T5.5 dwarf binary. The binary is unresolved in the XMM detectors, however the X-ray emission is…