Volume 429, Number 2, January II 2005
|Page(s)||625 - 629|
|Section||Stellar structure and evolution|
|Published online||17 December 2004|
First spectra of the W UMa system V524 Monocerotis*
European Southern Observatory, Casilla 19001, Santiago 19, Chile e-mail: email@example.com
Accepted: 27 August 2004
We present the first high-resolution spectra of the W UMa contact binary V524 Mon. The spectra of the two components are very similar, resembling a G5 and a K0. We find the radial velocities and rotational velocities consistent with corotation. We estimate the radii and the masses and derive a mass ratio . We confirm that V524 Mon is a W-type contact system, likely enclosed in a common convective envelope, as found by [CITE]. We do not find evidence for the expected level of emission in the chromospheric H and K lines, neither Hα, indicating that the magnetic activity is much weaker than expected or that other processes are hampering chromospheric emission.
Key words: stars: binaries: symbiotic / stars: binaries: spectroscopic / stars: chromospheres / stars: activity
© ESO, 2005
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.