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X-raying Circumstellar Material around Young Stars

Published online by Cambridge University Press:  27 January 2016

P. C. Schneider  and
H. M. Günther
P. C. Schneider
Affiliation:
ESA/ESTEC email: cschneid@cosmos.esa.int
H. M. Günther
Affiliation:
MIT email: hgunther@mit.edu
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Abstract

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Young stars are surrounded by copious amounts of circumstellar material. Its composition, in particular its gas-to-dust ratio, is an important parameter. However, measuring this ratio is challenging, because gas mass estimates are often model dependent. X-ray absorption is sensitive to the gas along the line-of-sight while optical/near-IR extinction depends on the dust. Therefore, the absorber's gas-to-dust ratio is directly given by the ratio between X-ray and optical/near-IR extinction. We present three systems where we used X-ray and optical/near-IR data to constrain the gas-to-dust ratio of circumstellar material; from a dust rich debris disk to gaseous protoplanetary disks.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Issue S314: Young Stars & Planets Near the Sun , November 2015 , pp. 149 - 152
Copyright
Copyright © International Astronomical Union 2016 

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