The M-dwarf contribution to the diffuse soft X-ray background revisited

Journal Article · Sat Sep 01 00:00:00 EDT 1990 · Publications of the Astronomical Society of the Pacific; (USA)

DOI:https://doi.org/10.1086/132728· OSTI ID:6163970

Caillault, J ^[1]

---

1. Georgia Univ., Athens (USA)

The M-dwarf contribution to the soft X-ray background has been redetermined using new optical photometry for a previous sample of M dwarfs and additional Einstein X-ray survey data. The result, which is obtained from a sample area more than double the size of that previously used, is a conservative upper limit: M dwarfs contribute less than 10 percent to the soft XRB. This limit is consistent with that obtained in a similar X-ray-selected sample analysis by Caillault et al. (1986) and is more than a factor of two less than the estimate obtained by Rosner et al. (1981) from an optically selected sample of stars. 14 refs.

• OSTI ID: 6163970
• Journal Information: Publications of the Astronomical Society of the Pacific; (USA), Journal Name: Publications of the Astronomical Society of the Pacific; (USA) Vol. 102; ISSN PASPA; ISSN 0004-6280
• Country of Publication: United States
• Language: English

Related Subjects

640101 -- Astrophysics & Cosmology-- Cosmic Radiation
640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BACKGROUND RADIATION
COSMIC PHOTONS
COSMIC RADIATION
DWARF STARS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
IONIZING RADIATIONS
LIMITING VALUES
LUMINOSITY
MASSLESS PARTICLES
OPTICAL PROPERTIES
ORIGIN
PHOTOMETRY
PHOTONS
PHYSICAL PROPERTIES
RADIATIONS
SOFT X RADIATION
SPECTRA
STARS
X RADIATION
X-RAY SPECTRA