New Stellar Science with Astro-H
Abstract
The upcoming X-ray mission ASTRO-H has the unprecedented high energy resolution and highly accurate energy determination (i.e., stable gain) of Soft X-ray Spectrometer (SXS). Combined with the broad-band capability of Soft and Hard X-ray Imagers (SXI and HXI), we will be able to explore a new horizon to extend our understanding of stars and related phenomena. We here highlight the stellar science topics that the ASTRO-H team considers of high priority. (1) Formation of a central star in protostars will be shed light on, for the first time, with the detection of the Doppler shifts of Fe K lines, (2) Dynamical movement of materials during flares will be captured as the Doppler shifts of Fe K lines, (3) Evidence for accreting plasma will be examined in T Tauri star with a diagnostic of the density-sensitive lines, (4) The fluorescent Fe emission line will be commonly observed in massive stellar binary, and then the geometry of the hot gas, which illuminates the stellar surface, would be diagnosed, (5) Hot plasma have been found to fill cavities in star forming regions with unidentified lines. The diagnostics of the lines will determine whether they originate from Non-Equilibrium Ionization conditions or charge exchange.
- Publication:
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American Astronomical Society Meeting Abstracts #225
- Pub Date:
- January 2015
- Bibcode:
- 2015AAS...22533831T