Abstract
view Abstract Citations (23) References (33) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The UV continuum spectrum of M81 Bruzual A., G. ; Peimbert, M. ; Torres-Peimbert, S. Abstract From IUE data the absolute continuum spectrum for the nucleus of M81 in the 1200-3200 A range is presented. The spectrum can be fitted by an old stellar population with a small contribution from horizontal-branch stars. It is found that the number of stars with m less than 0.3 solar mass is negligible. An upper limit for the nonthermal contribution to the UV spectrum is obtained, which together with the radio and X-ray fluxes yields a power law spectrum with alpha(ux) ranging from 0.7 to 1.3. The power-law radiation field produces from 5 percent to 50 percent of the photons needed to maintain the nuclear regions of M81 ionized. Publication: The Astrophysical Journal Pub Date: September 1982 DOI: 10.1086/160271 Bibcode: 1982ApJ...260..495B Keywords: Continuous Spectra; Galactic Nuclei; Seyfert Galaxies; Ultraviolet Spectra; Horizontal Branch Stars; Iue; Star Distribution; Stellar Mass; Ultraviolet Astronomy; Astrophysics full text sources ADS | data products NED (2) MAST (1) INES (1)
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
