Results 51 to 60 of about 5,591,095 (382)

Variability and star formation in Leo T, the lowest luminosity star-forming galaxy known today [PDF]

, 2012
We present results from the first combined study of variable stars and star formation history (SFH) of the Milky Way (MW) "ultra-faint" dwarf (UFD) galaxy Leo T, based on F606W and F814W multi-epoch archive observations obtained with the Wide Field ...
Barning, Bell, Belokurov, Belokurov, Benedict, Bovill, Bovill, Brown, Bullock, Caputo, Castellani, Cignoni, Clementini, Clementini, Clementini, Clementini, Coté, Dall'Ora, Dall'Ora, de Jong, De Propris, Di Criscienzo, Diemand, Dolphin, Dolphin, Ferguson, Gisella Clementini, Grcevich, Greco, Hidalgo, Hidalgo, Hurley-Keller, Ibata, Ilaria Musella, Irwin, Kirby, Kirby, Koposov, Kuehn, Law, Luciana Federici, Mackey, Mackey, Marcella Marconi, Michele Cignoni, Monica Tosi, Moretti, Musella, Musella, Muñoz, Oosterhoff, Plummer, Richardson, Rocha, Rodrigo Contreras Ramos, Schlegel, Simon, Skillman, Slater, Tumlinson, Vincenzo Ripepi, Weisz, Weisz   +62 more
core   +2 more sources

Gaia and variable stars [PDF]

Proceedings of the International Astronomical Union, 2013
AbstractThe study of variable phenomena (periodic, irregular or transient) provides a unique way to acquire knowledge about objects in our Universe. Currently, we are going through a rapid expansion of time-domain astrophysics. One reason for this expansion is the technological developments materialised in small to medium size observational projects ...
{Eyer} L., {Holl} B., {Mowlavi} N.
openaire   +3 more sources

SOME EUROPEAN VARIABLE STAR OBSERVERS ORGANIZATIONS

Odessa Astronomical Publications, 2017
A subjective description and comparison of four groups of variable stars observers.
A. Paschke
doaj   +1 more source

Current stage of studies of the star configurations at intermediate energies with the use of the BINA detector

SciPost Physics Proceedings, 2020
The Space Star Anomaly in proton-deuteron breakup cross-section occurs at energies of about 10 MeV. Data for higher energies are sparse. Therefore, a systematic scan over star configurations in the range of intermediate energies between 50 and 100 MeV ...
A. Wilczek, A. Szadzinski, K. Bodek, I. Ciepal, M. Eslami-Kalantari, N. Kalantar-Nayestanaki, G. Khatri, St. Kistryn, B. Klos, A. Kozela, J. Kubos, P. Kulessa, A. Lobejko, A. Magiera, H. Mardanpour, J. Messchendorp, I. Mazumdar, W. Parol, A. Ramazani-Moghaddam-Aran, R. Ramazani-Sharifabadi, D. Rozpedzik, I. Skwira-Chalot, E. Stephan, B. Wloch, A. Wronska, J. Zejma
doaj   +1 more source

Multifilter Time-series Observations of Eleven Blue Short-period ATLAS Variable Stars

The Astronomical Journal, 2023
Eleven periodic variable stars were observed photometrically through two to four filters from the set UBVR _C I _C . Phase-folded data for each star cover full cycles of variation.
C. Koen, V. Schaffenroth, A. Kniazev
doaj   +1 more source

SDSS J142625.71+575218.3: A Prototype for A New Class of Variable White Dwarf [PDF]

, 2008
We present the results of a search for pulsations in six of the recently discovered carbon-atmosphere white dwarf ("hot DQ") stars. On the basis of our theoretical calculations, the star SDSS J142625.71 + 575218.3 is the only object expected to pulsate ...
DeGennaro, Steven, Dufour, Patrick, Liebert, James, Montgomery, M. H., Williams, Kurtis A., Winget, D. E.   +5 more
core   +1 more source

The star formation history of the Magellanic Clouds derived from long-period variable star counts [PDF]

, 2014
We present the first reconstruction of the star formation history (SFH) of the Large and Small Magellanic Clouds (LMC and SMC) using Long Period Variable stars. These cool evolved stars reach their peak luminosity in the near-infrared; thus, their K-band
S. R. Kh., A. Javadi, H. Khosroshahi, J. V. Loon   +3 more
semanticscholar   +1 more source

BD +20°1171 - LONG - PERIODIC VARIABLE STAR

Odessa Astronomical Publications, 2017
BD +20°1171 (= NSV 16732 = TYCHO 1320 91 1 = HD 39785 = SAO 077726) is a long-periodic pulsating variable star of SRc-type with a period of 20930d , range of variations in B 8.m8 - 10.m3, and the most realiable maximum is JD 2443410 ...
I. S. Brukhanov
doaj   +1 more source

HS 2237+8154 : on the onset of mass transfer or entering the period gap? [PDF]

, 2004
We report follow-up observations of a new white dwarf/red dwarf binary HS 2237+8154, identified as a blue variable star from the Hamburg Quasar Survey. Ellipsoidal modulation observed in the R band as well as the radial velocity variations measured from
Araujo-Betancor, B. T. Gänsicke, Baraffe, Bertin, Beuermann, Beuermann, Binnendijk, Bleach, D. Engels, Delfosse, Downes, E. T. Harlaftis, Gänsicke, Gänsicke, H.-J. Hagen, Hamada, Horne, Kawka, Kirkpatrick, Kube, Marsh, Nogami, O'Donoghue, Ritter, S. Araujo-Betancor, S. Dreizler, S. Kitsionas, Schreiber, Schwarzenberg-Czerny, Shara, Szkody, Szkody, Thorstensen   +32 more
core   +2 more sources

EXAMINING THE INFRARED VARIABLE STAR POPULATION DISCOVERED IN THE SMALL MAGELLANIC CLOUD USING THE SAGE-SMC SURVEY [PDF]

, 2014
We present our study on the infrared variability of point sources in the Small Magellanic Cloud (SMC). We use the data from the Spitzer Space Telescope Legacy Program “Surveying the Agents of Galaxy Evolution in the Tidally Stripped, Low Metallicity ...
E. Polsdofer, J. Seale, M. Sewiło, U. Vijh, M. Meixner, M. Marengo, Maverick Terrazas   +6 more
semanticscholar   +1 more source