Investigating Variable Stars in the Open Cluster NGC 1912 and Its Surrounding Field [PDF]
, 2020 In this work, we studied the variable stars in the open cluster NGC 1912 based on the photometric observations and $Gaia$ DR2 data. More than 3600 CCD frames in B, V, R filters were reduced, and we obtained the light curves that span about 63 hours. By analyzing these light curves, we detected 24 variable stars, including 16 periodic variable stars ...
arxiv +1 more source
The Herschel view of the nebula around the luminous blue variable star AG Carinae [PDF]
, 2015 Far-infrared Herschel PACS imaging and spectroscopic observations of the nebula around the luminous blue variable (LBV) star AG Car have been obtained along with optical imaging in the Hα+[N ii] filter.
C. Vamvatira-Nakou +7 more
semanticscholar +1 more source
Synergies between Exoplanet Surveys and Variable Star Research [PDF]
, 2017 With the discovery of the first transiting extrasolar planetary system back to 1999, a great number of projects started to hunt for other similar systems.
Kovacs, Geza
core +3 more sources
Long-period variable stars in NGC 147 and NGC 185 – I. Their star formation histories [PDF]
, 2016 NGC 147 and NGC 185 are two of the most massive satellites of the Andromeda galaxy (M 31). Close together in the sky, of similar mass and morphological type dE, they possess different amounts of interstellar gas and tidal distortion.
Roya H. Golshan +4 more
semanticscholar +1 more source
STEREO observations of stars and the search for exoplanets [PDF]
, 2011 The feasibility of using data from the NASA STEREO mission for variable star and asteroseismology studies has been examined. A data analysis pipeline has been developed that is able to apply selected algorithms to the entire data base of nearly a million
A. J. Norton +29 more
core +2 more sources
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. +3 more
semanticscholar +1 more source
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 +6 more
semanticscholar +1 more source
Variable stars across the observational HR diagram [PDF]
J.Phys.Conf.Ser.118:012010,2008, 2007 An overview of pulsating variable stars across the observational Hertzprung-Russel (HR) diagram is presented, together with a summary of their global properties. The HR diagram is presented with a third colour-coded dimension, visualizing the fraction of variable, the amplitude of variability or the period of variability.
arxiv +1 more source
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 +62 more
core +2 more sources
DISCOVERY OF A STRONGLY PHASE-VARIABLE SPECTRAL FEATURE IN THE ISOLATED NEUTRON STAR RX J0720.4–3125 [PDF]
, 2015 We present the discovery of a strongly phase-variable absorption feature in the X-ray spectrum of the nearby, thermally emitting, isolated neutron star RX J0720.4–3125.
A. Borghese +4 more
semanticscholar +1 more source