M dwarf Stars - The By-Product of X-Ray Selected AGN Candidates

Details M dwarf Stars - The By-Product of X-Ray Selected AGN Candidates M dwarf Stars - The By-Product of X-Ray Selected AGN Candidates

2012-01-06

arxiv.org/abs/1201.1359v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

10 pages, 26 figures, accepted for publication in Research in Astronomy and Astrophysics (RAA)

Scientific paper

X-ray loud M dwarfs are a major source of by-product (contamination) in the X-ray band of the multiwavelength quasar survey (MWQS). As a by-product, the low dispersion spectra of 22 M dwarfs are obtained in which the spectra of 16 sources are taken for the first time. The spectral types and distance of the sample are given based on spectral indices CaH2, CaH3, and TiO5. The parameter {\zeta}TiO/CaH is calculated to make the metallicity class separation among dwarfs, subdwarfs and extreme subdwarfs. We also discuss the distributions in the diagrams of Log(Lx/Lbol) versus spectral type and infrared colors.

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