Search Publications
Astroinformatics: The Importance of Mining Astronomical Data in Binary Stars Catalogues
Abushattal, A. A.; Alrawashdeh, A. A.; Kraishan, A. F.
The field of Astroinformatics offers exciting new perspectives on astronomical discovery through the implementation of advanced data mining procedures. Data deluges transform research practices and methodologies across various scientific disciplines, including day-to-day astronomical research. It is essential to use innovative algorithms and metho…
New late-type stars found in the BAO Plate Archive
Kostandyan, G. R.; Abrahamyan, H. V.; Paronyan, G. M. +1 more
The BAO Plate Archive low-resolution spectral plate centered \alpha = +04h; \delta = +240 is analyzed to find new late-type stars. 25 new late-type stars have been detected. We have performed cross-correlations with GAIA DR3, USNO-B1.0, 2MASS, AllWISE, IRAS PSC/FSC, AKARI and SDSS. For new detected objects, we present luminosity classes estimated …
Semi-detached double-lined eclipsing binaries with Gaia DR3 data
Malkov, O. Yu.; Grinenko, A. D.; Sachkov, A. M.
Semi-detached double-lined eclipsing binaries (SD DLEB) play an important role in our understanding of basic properties of interacting binaries. We have collected data on semi-detached systems with available light and radial velocity curve solutions, and have compiled the most comprehensive list of SD DLEB, containing astrophysical and orbital par…
First Byurakan Spectral Survey. Late-Type Stars. Dwarfs
Gigoyan, K. K.; Gigoyan, K. S.; Kostandyan, G. R. +5 more
A total of 18 lists of the First Byurakan Survey of Late-Type Stars (FBS LTS) were published between 1990 and 2016. The stars were found on FBS low-dispersion spectral plates. A systematic search and selection were carried out on a surface of ∼16 000 deg^2 on almost the whole area of the FBS. Since 2007, all FBS low-resolution spectral plates have…
The Precise Individual Masses and Theoretical Stability and Habitability of some Single-lined Spectroscopic Binaries
Abushattal, A. A.; Kraishan, A. F.; Algnamat, B. S. +1 more
Over the past few decades, some Spectroscopic Binaries (SBs) have been resolved using high-resolution techniques. Astrophysics is interested in this subject because we can obtain the mass of each component. By combining a visual solution with a complimentary one, such as the spectroscopic orbit or Edward method, we can determine the individual mas…
Gaia EDR3 Data For Three Young Stellar Objects
Gigoyan, K. K.; Gigoyan, K. S.; Azatyan, N. M.
We present Gaia Early Data Release 3 (GaiaEDR3) high accurate astrometric and photometric data and also Catalina Sky Survey (CSS) phase-dependent light curves for three Young Stellar Objects (YSO). They are LRL245, 2MASSJ04300424+3533238, and CVSO592. These tree YSOs are presented as periodic variables in the Catalina Surveys Data Release-1 (CSDR1…
Preliminary Statistical Analysis of Lambda Boötis Stars
Paunzen, E.; Hakobyan, A. A.; Alecian, G. +1 more
To enlarge our database of Chemically Peculiar stars, we compiled published data concerning the Lambda Boötis stars observed by high-resolution spectroscopy techniques during last decades. In total, 62 Lambda Boötis stars have been added to the database. To deepen our knowledge on statistical overview of the abundance anomalies versus the physical…
Study of DFBS Late-Type Stars at High Galactic Latitudes
Kostandyan, G. R.
We study in this thesis relatively bright late-type giants found in the First Byurakan Survey (FBS) data base. We present the 2nd version of the catalogue of FBS LTS with new data (FBS LTS v2), 1471 objects. It is a homogeneous and complete database for high- Galactic late-type stars, including M and C types. Since 2007, all FBS low-resolution spe…
Variability study of the FBS M giants
Gigoyan, K. S.; Kostandyan, G. R.
We study in this paper variability of the late-type M giants found in the First Byurakan Survey (FBS) spectroscopic data base. We used phase dependent light - curves from large sky area variability data bases such as Catalina Sky Survey (CSS) and All-Sky Automated Survey for Supernovae (ASAS-SN). We used also the distance information derived from …
On the origin of runaway binaries: the case of the HMXB 4U 2206+54/BD +53 2790
Neuhäuser, R.; Mugrauer, M.; Stoyanov, K. A. +7 more
We present most probable place and time of the origin of the runaway high-mass X-ray binary 4U 2206+54 based on its Gaia EDR3 astrometric parameters and our new systemic radial velocity. We studied the trace back motion of the system and propose that it originated in the subgroup of the Cepheus OB1 association (Age~4-10 Myr) with its brightest sta…