STIS UV spectroscopy of early B supergiants in M31

Details STIS UV spectroscopy of early B supergiants in M31 STIS UV spectroscopy of early B supergiants in M31

2002-07-16

arxiv.org/abs/astro-ph/0207326v1

Astrophys.J. 580 (2002) 213-224

Astronomy and Astrophysics

Astrophysics

15 pages, 9 figures, 2 tables. Accepted for publication in The Astrophysical Journal

Scientific paper

10.1086/343072

We analyze STIS spectra in the 1150-1700 Angstrom wavelength range obtained for six early B supergiants in the neighboring galaxy M31. Because of their likely high (nearly solar) abundance, these stars were originally chosen to be directly comparable to their Galactic counterparts, and represent a much-needed addition to our current sample of B-type supergiants, in our efforts to study the dependence of the Wind Momentum-Luminosity Relationship on spectral type and metallicity. As a first step to determine wind momenta we fit the P-Cygni profiles of the resonance lines of N V, Si IV and C IV with standard methods, and derive terminal velocities for all of the STIS targets. From these lines we also derive ionic stellar wind column densities. Our results are compared with those obtained previously in Galactic supergiants, and confirm earlier claims of `normal' wind line intensities and terminal velocities in M31. For half of the sample we find evidence for an enhanced maximum turbulent velocity when compared to Galactic counterparts.

Affiliated with

Also associated with

No associations

Rating

STIS UV spectroscopy of early B supergiants in M31 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with STIS UV spectroscopy of early B supergiants in M31, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and STIS UV spectroscopy of early B supergiants in M31 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-42461