BZ Cam during its 1999/2000 optical low state
Abstract
We report optical observations of the VY Scl star BZ Cam during its previous optical low state in 1999/2000. We find drastic variations in the line profiles. Narrow-band imaging observations show that its nebula extends farther than previously known and seems to be composed of two components. We determine the [OIII] line intensity of BZ Cam's nebula to 4.8 * 10^-13 erg/cm^2/s. We discover a proper motion of BZ Cam of 25+-2 mas/yr which together with the systemic radial velocity yields a space velocity of 125 km/s. We re-interpret the nebula as being photo-ionized by hypothesized transient, luminous, supersoft X-ray emission during optical low states, and shaped by the transverse motion of BZ Cam.
Keywords
Cite
@article{arxiv.astro-ph/0107405,
title = {BZ Cam during its 1999/2000 optical low state},
author = {J. Greiner and G. Tovmassian and M. Orio and H. Lehmann and V. Chavushyan and A. Rau and R. Schwarz and R. Casalegno and R. -D. Scholz},
journal= {arXiv preprint arXiv:astro-ph/0107405},
year = {2009}
}
Comments
8 pages with aa.sty, 8 figures, to appear in A&A