Searching relativistic stars among 0-B runaways I: V568 Cyg = HD 197419

Title:

Searching relativistic stars among 0-B runaways I: V568 Cyg = HD 197419

Creator:

Blanco, C., Mammano, A., Baratta, G., Coluzzi, R., Croce, V., Margoni, R., Stagni, R., Munari, U., and Dalmeri, I.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:6bcadd58-2dad-4cf3-900e-30d6ae2cb1c3
uuid:6bcadd58-2dad-4cf3-900e-30d6ae2cb1c3

Subject:

astrophysics and relativistic stars

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

V568. Cyg has been observed photometrically, spectroscopically and photographically during a campaign on 0-B runaways. These may contain either postsupernova binaries or stars dynamically ejected. from young associations. Whereas even its variability was doubtful, we have recorded photometric minima deeper from V to U as well as strong inversion of colour indexes, the star becoming redder as the minimum gets deeper: 1986 (mean value) 1987 (mean value) July 30, 86 August 2,86 B-V - 0.26 - 0.23 + 1.74 + 1.62 U-B - 0.63 - 0.59 + 1.30 + 1.05 New transient Hα emission episodes have been observed. The equivalent widths of absorption lines of hydrogen, except Hα, change in a correlated way reaching their lowest value sometimes at photometric minima. Eclipse of a hot object with a possible disk, by a late type giant in an eccentric orbit, seems the most viable explanation. The ephemeris J.D. 2446641.5 + 152.12 days may help the search for further primary minima.

Language:

Czech

Rights:

http://creativecommons.org/publicdomain/mark/1.0/
policy:public

Coverage:

59-61

Source:

Publications of the Astronomical Institute of the Academy of Sciences of the Czech Republic | 1987 Volume:63-70 | Number:70

Harvested from:

CDK

Metadata only:

false