Long period variable stars
NEW LIGHT ELEMENTS FOR 63 LONG PERIOD VARIABLE STARS FROM ASAS-3 DATABASE
... We present new light elements of 63 long period variable stars in the southern hemi- sphere ( − 83 ◦ < DEC < − 15 ◦ ). All observations were obtained from the ASAS-3 database. The ...
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K2 variable catalogue : variable stars and eclipsing binaries in K2 campaigns 1 and 0
... The K2 mission (Howell et al. 2014) is the survey now being conducted with the repurposed Kepler space telescope, and be- came fully operational in June 2014. It will survey a series of fields near the ecliptic, ...
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An evolved donor star in the long period cataclysmic variable HS 0218+3229
... donor stars are usually veiled by the ex- treme brightness of the accretion structures, especially the ac- cretion ...h period gap, so optical studies aimed at dynamical mass mea- surements are scarce and ...
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COMMISSIONS G1 AND G4 OF THE IAU INFORMATION BULLETIN ON VARIABLE STARS
... It will be seen that the many points since the first (in 1929) display considerable scatter. While the scatter is understandable for the photographic and visual points display, it is not clear why the photoelectric (PE) ...
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Blazhko modulation in first-overtone RR Lyrae stars from the OGLE Collection
... RRc stars exhibit pe- riod changes, which manifest themselves in power spectra as a remnant power in the position of the first overtone after the ...a long-period Blazhko ...candidates. Stars ...
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Classification of variable stars in the WFCAM Transit Survey
... On the left panel of Fig. 4 the logarithm of the amplitude of the first harmonic is plotted against the logarithm of the frequency. Based on this, one can clearly separate the long-period variables from the ...
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Improved methodology for the automated classification of periodic variable stars
... this period is signif- icant, using the false alarm probability (Horne & Baliunas 1986; Schwarzenberg-Czerny ...Lyr stars). This procedure is repeated as long as significant frequencies are ...
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Challenges in the automated classification of variable stars in large databases
... Lyrae stars have shown that about 30% exhibit some form of Blazhko behavior – period and amplitude variation associated with mode switching – and there are also small amplitude cycle-to-cycle modulations in ...
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HD220735 AND HD30110, NEW SHORT PERIOD VARIABLE STARS
... This star was observed on only one night for a sufficient time span to cover two cycles. To determine the periodic behavior of HD220735 the following methods were employed. In the first method differences of the two ...
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Snigula, Jan (2006): Long Period Variables in Local Group Dwarf Galaxies. Dissertation, LMU München: Fakultät für Physik
... the variable sources is shown in ...the variable sources shows no peculiarities with respect to the visible shape of the dwarf ...old stars extending well outside the Holmberg ...the variable ...
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Variable stars in the bulge globular cluster NGC 6401
... Lyrae stars that are the most plausible cluster members, we have determined that NGC 6401 is an OoI cluster of intermediate metallicity that belongs to the metal-rich population of ∼20 bulge clusters that lie ...
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Faint (and bright) variable stars in the satellites of the Milky Way
... Cepheid stars in extragalactic systems has been difficult because of observa- tional ...Cepheid stars are faint (∼ ...Cepheid stars in distant ...
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Discrete Scale Relativity and SX Phoenicis Variable Stars
... of variable stars are high-amplitude, low-l, oscillators that are more like the RR Lyrae stars and far less heterogeneous than the ZZ Ceti ...field stars with masses in a range of roughly ...
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OH/IR stars in the inner bulge detected by ISOGAL
... of long period variables very close to the Galactic Centre do not follow any previous PL relationship, the stars showing lower luminosities or, alternatively higher periods than the relationships ...
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The secondary stars in cataclysmic variables and low-mass X-ray binaries
... The spectral type of the secondary star has been measured in 66 CVs with known orbital periods, according to the catalogue of Ritter & Kolb (1998). A number of these measurements, however, are dubious, relying on ...
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Gössl, Claus (2007): Finding Cepheid Variable Stars in Northern Dwarf Galaxies of the Local Group. Dissertation, LMU München: Fakultät für Physik
... The o ff set guiding unit of MONICA is built of a commercial CCD camera (SBIG ST-7) which can be positioned by the same motor controller as the filter wheel of MONICA. A radial trans- lation stage may be rotated by 270 ...
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COMMISSIONS G1 AND G4 OF THE IAU INFORMATION BULLETIN ON VARIABLE STARS
... From the shape of the light curve, it was clear that the system was in near contact but the difference in the depths of the two minima indicate that the stars are not in thermal contact. Various modes were tried: ...
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COMMISSIONS G1 AND G4 OF THE IAU INFORMATION BULLETIN ON VARIABLE STARS
... In addition, part of this work is a result of the Contact Binaries Towards Merging CoBiToM Project, initiated and still undergoing at the National and Kapodistrian University of Athens s[r] ...
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A theoretical study of the R Coronae Borealis group of variable stars
... Period-Luminosity curves for fundamental mode pulsation ••••• 7-107 Period-Luminosity curves for first overtone mode pulsation •• 7-108 Mass-Luminosity plots for the 5 'cool' variable RC[r] ...
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COMMISSIONS G1 AND G4 OF THE IAU INFORMATION BULLETIN ON VARIABLE STARS
... The Blazhko (BL) effect (Blazhko, 1907) is a common feature present in almost half of RR Lyrae (RRL) stars pulsating in the fundamental mode (Jurcsik et al., 2009; Benk˝o et al., 2010). Although it is known for ...
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