Optical Spectroscopy of the Unusual Emission-Line Object MWC 560

Details Optical Spectroscopy of the Unusual Emission-Line Object MWC 560 Optical Spectroscopy of the Unusual Emission-Line Object MWC 560

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...180.4413b&link_type=abstract

American Astronomical Society, 180th AAS Meeting, #44.13; Bulletin of the American Astronomical Society, Vol. 24, p.801

Astronomy and Astrophysics

Astronomy

Scientific paper

MWC 560, classified Beq in the original Mt. Wilson survey but noted as type M4ep by Sanduleak and Stephenson (Ap.J. 185, 899), underwent an outburst in 1990. Between Feb.-Apr. 1990 the star showed dramatic UV spectral variability, indicating the ejection of a thick shell (Michalitsianos et al., Ap.J. 371, 761). We have monitored the optical spectrum of MWC 560 during 1990-92 at Ritter Observatory using a fiber-coupled spectrograph and CCD, in coordination with IUE. Very significant spectral changes took place between the 90/91 and 91/92 observing seasons. Compared with 90/91, the data from a year later show: a broader and more blueshifted (-2200 km/s) absorption component of the strong Hα emission line; weaker Fe II, O I, and He I emission lines; much weaker D-line absorption. In the 8000-9000 Angstroms region, the Ca II infrared triplet lines are strong, narrow emission features, superimposed on the continuum of an M5 star; TiO bandheads appear stronger in 91/92 than a year earlier. The visible/red spectrum of MWC 560 appears to have been dominated by optically thick shell features in late-1990/early-1991. By November 1991, the shell signatures have weakened, and a variable high-velocity wind profile is evident at Hα . This research was partially supported by grants from NASA.

Affiliated with

Also associated with

No associations

Rating

Optical Spectroscopy of the Unusual Emission-Line Object MWC 560 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 Optical Spectroscopy of the Unusual Emission-Line Object MWC 560, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical Spectroscopy of the Unusual Emission-Line Object MWC 560 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1513157