High resolution spectroscopy of the galactic candidate LBV MWC 314

Details High resolution spectroscopy of the galactic candidate LBV MWC 314 High resolution spectroscopy of the galactic candidate LBV MWC 314

Sep 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26as..131..469m&link_type=abstract

Astronomy and Astrophysics Supplement, v.131, p.469-478

Astronomy and Astrophysics

Astrophysics

22

Stars: Early-Type, Supergiants, Abundances, Stars: Mass Loss, Stars: Individual: Mwc 314

Scientific paper

The results of high-resolution optical spectroscopy obtained for a recently suggested LBV candidate, MWC 314, are presented. Photospheric lines mostly of N ii and S ii have been found for the first time with a resolution of 0.4 - 0.8 Angstroms. They imply a N/O overabundance previously reported for AG and HR Car since no O ii absorptions were detected. Nearly 400 emission lines have been identified in the spectrum between 4190 and 8864 Angstroms many of which appear double-peaked. No significant P Cyg-type absorption components have been found for the optically thick Balmer lines. This suggests that the stellar wind of MWC 314 is non-spherical and the circumstellar envelope is viewed not edge-on. The systemic velocity measured using the emission lines of ionized metals turned out to be +55 km s(-1) , which corresponds to a distance towards the object of 3.0 +/- 0.2 kpc, according to the galactic rotation curve. Our analysis of the characteristics of both photospheric and wind lines resulted in an estimate of the object's T_eff of nearly 25000 K, which, however, needs further improvement. The other stellar parameters were found to be as follows: log L_bol / Lsun = 6.1 +/- 0.3, R_* = 60(+30}_{-10) \ Rsun. Our study confirms that MWC 314 is one of the most luminous stars in the Milky Way. Tables 1--4 are available in electronic form at the CDS via anonymous ftp 130.79.128.5

Affiliated with

Also associated with

No associations

Rating

High resolution spectroscopy of the galactic candidate LBV MWC 314 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 High resolution spectroscopy of the galactic candidate LBV MWC 314, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High resolution spectroscopy of the galactic candidate LBV MWC 314 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-810313