Results 21 to 30 of about 349,394 (283)

Four New Delta Scuti Pulsators from a Variability Survey of 131 Stars

, 2002
In a photometric variability survey of 131 stars with B < 14 mag, we have found four new Delta Scuti stars. We were sensitive to oscillation amplitudes as low as a few mmag.
Alexei V. Filippenko, Eyer L., Groot P., Hog E., J. L. Sokoloski, Kholopov P. N., Lars Bildsten, Lopez de Coca P., Munari U., Petersen J. O., Pojmanski G., R. Chornock, Sokoloski J. L., Udalski A., Udalski A., Udalski A., Viskum M., Viskum M.   +17 more
core   +2 more sources

Detection of Variable Stars in the Open Cluster M11 Using Difference Image Analysis Pipeline [PDF]

Journal of Astronomy and Space Sciences, 2010
We developed a photometric pipeline to be used for a wide field survey. This pipeline employs the difference image analysis (DIA) method appropriate for the photometry of star dense field such as the Galactic bulge.
Chung-Uk Lee, Jae-Rim Koo, Seung-Lee Kim, Seung-Lee Kim, Byeong-Gon Park, Cheongho Han   +5 more
doaj   +1 more source

Variable stars in the Open Cluster M11 (NGC 6705)

, 2007
V-band time-series CCD photometric observations of the intermediate-age open cluster M11 were performed to search for variable stars. Using these time-series data, we carefully examined light variations of all stars in the observing field.
Breger M., C.‐U. Lee, Frandsen S., Frandsen S., Hoffmeister C., J.‐R. Koo, Kaluzny J., McNamara B. J., Rodriguez E., Rodriguez E., Rucinski S. M., S.‐C. Rey, S.‐L. Kim, Vilhu O., Viskum M., Y. B. Kang, Y. H. Kim, Y.‐B. Jeon   +17 more
core   +1 more source

Variability survey of brightest stars in selected OB associations

, 2016
The stellar evolution theory of massive stars remains uncalibrated with high-precision photometric observational data mainly due to a small number of luminous stars that are monitored from space.
Eenmäe, Tõnis, Kolka, Indrek, Laur, Jaan, Leedjärv, Laurits, Tuvikene, Taavi   +4 more
core   +1 more source

The WFCAM Multi-wavelength Variable Star Catalog [PDF]

, 2014
Stellar variability in the near-infrared (NIR) remains largely unexplored. The exploitation of public science archives with data-mining methods offers a perspective for the time-domain exploration of the NIR sky.
Angeloni, R., Catelan, M., Cross, N. J. G., De Medeiros, J. R., Dékány, I., Leão, I. C., Lopes, C. E. Ferreira   +6 more
core   +5 more sources

DIVISION V: VARIABLE STARS [PDF]

Proceedings of the International Astronomical Union, 2008
Division V deals with all aspects of stellar variability, either intrinsic or due to eclipses by its companion in a binary system. In the case of intrinsic stellar variability the analysis of pulsating stars, surface inhomogeneities, stellar activity and oscillations are considered.
Giménez, Alvaro, Steven D., Kawaler, Aerts, Conny, Christensen-Dalsgaard, Jørgen, Breger, Michael, Guinan, Edward F., Kurtz, Donald W., Rucinski, Slavek M.   +7 more
openaire   +2 more sources

Database of Molecular Masers and Variable Stars [PDF]

, 2018
We present the database of maser sources in H2O, OH and SiO lines that can be used to identify and study variable stars at evolved stages. Detecting the maser emission in H2O, OH and SiO molecules toward infrared-excess objects is one of the methods of ...
Ladeyschikov, D. A., Nakashima, J. -I., Sobolev, A. M.   +2 more
core   +1 more source

Variable Stars and Galactic Structure

, 2013
Variable stars have a unique part to play in Galactic astronomy. Among the most important of these variables are the Cepheids (types I and II), the RR Lyraes and the Miras (O- and C-rich).
Feast, Michael W., Whitelock, Patricia A.   +1 more
core   +1 more source

Searching for variable stars in Galactic Open Clusters [PDF]

, 2009
A long-term project, aiming at systematic search for variable stars in Galactic Open Clusters, was started at the Geneva Observatory in 2002. We have been observing regularly a sample of twenty-seven Galactic Open Clusters in the U, B, V Geneva filters ...
Claudia Greco, Gilbert Burki, Joyce Ann Guzik, Laurent Eyer, Maxime Spano, Mihaly Varadi, Nami Mowlavi, Paul A. Bradley   +7 more
core   +2 more sources

Pulsating B-type stars in the young open cluster h Persei (NGC 869)

, 2007
We announce the discovery of six Beta Cephei stars and many other variable stars in the young open cluster h Persei (NGC 869). The cluster seems to be very rich in variable B-type stars, similarly to its twin, Chi Persei (NGC 884).Comment: 5 pages, 5 ...
Aleksandra Majewska-Świerzbinowicz, Andrzej Pigulski, Gomez-Forrellad J M, Keller S C, Krzesiński J, Oosterhoff P T, Róbert Szabó, Saesen S, Zoltán Csubry   +8 more
core   +1 more source