1,804 research outputs found
Virtual Observatory based identification of AX J194939+2631 as a new cataclysmic variable
We report the discovery of a new cataclysmic variable (CV) among unidentified
objects from the ASCA Galactic Plane Survey made using the Virtual Observatory
data mining. First, we identified AX J194939+2631 with IPHAS
J194938.39+263149.2, the only prominent H-alpha emitter among 400 sources in a
1 arcmin field of the IPHAS survey, then secured as a single faint X-ray source
found in an archival Chandra dataset. Spectroscopic follow-up with the 3.5-m
Calar Alto telescope confirmed its classification as a CV, possibly of magnetic
nature. Our analysis suggests that AX J194939+2631 is a medium distance system
(d ~ 0.6 kpc) containing a late-K or early-M type dwarf as a secondary
component and a partially disrupted accretion disc revealed by the
double-peaked H-alpha line. However, additional deep observations are needed to
confirm our tentative classification of this object as an intermediate polar.Comment: 5 pages, 5 figures, 2 tables, accepted to Astronomy and Astrophysic
Search for and investigation of new stellar clusters using the data from huge stellar catalogues
We present new automatic methods of search for star clusters using the data
available in new huge stellar catalogues. Using 2MASS catalogue we have
discovered over ten new open clusters in the region of Galaxy anticenter and
determined their physical parameters.Comment: Proceedings of the 79th Annual Scientific Meeting of the
Astronomische Gesellschaft, Cologne(Germany), September 200
- …