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291. Combined General Catalogue of Variable Stars
ID:
ivo://CDS.VizieR/II/214A
Title:
Combined General Catalogue of Variable Stars
Short Name:
II/214A
Date:
21 Oct 2021
Publisher:
CDS
Description:
The GCVS is the only reference source on all known variable stars. This version contains all of the electronically-readable version as distributed by the Sternberg Astronomical Institute and Institute of Astronomy (Russian Acad.Sci.), Moscow. It includes the catalog of variable stars, updated and completed with the seven Name-Lists of Variables Stars Nos.67-73 (see IBVS No.2681,1985; No.3058,1987; No.3323,1989; No.3530,1990; No.3840,1993; No.4140,1995; No.4471,1997), a catalog of suspected variables, a cross-index of variable star names, a catalog of extragalactic variables, and a catalog of supernovae.
292. Compiled catalog of stellar data of Miras
ID:
ivo://CDS.VizieR/J/A+A/384/925
Title:
Compiled catalog of stellar data of Miras
Short Name:
J/A+A/384/925
Date:
21 Oct 2021
Publisher:
CDS
Description:
The Compiled Catalogue of Mira variables is a result of a merge of the 4th edition of the General Catalogue of Variable Stars (GCVS-4) <II/214A> and present-day high-precision catalogues of space (Hipparcos-Tycho family: Hipparcos <I/239>, Tycho-1 <I/239>, Tycho-2 <I/259>, ACT RC <I/246>, TRC <I/250>) and ground-based (CMC11 <I/256>, PPM-N <I/146>, PPM-S <I/193>, PPM-add <I/208>, Kharchenko 1992) data. The catalogue contains 1103 Miras. Equatorial coordinates were taken from the source catalogues in accordance with the priority: Hipparcos, Tycho-2, Tycho-1, CMC11, PPM, Kharchenko 1992. The proper motions of 1041 Miras are calculated as mean weighted values of source data reduced to the Hipparcos system. The radial velocities of 786 Miras were taken from nine catalogues and lists of Feast (1963MNRAS.125..367F, 1966MNRAS.132..495F), Smak and Preston (1965ApJ...142..943S), Perry and Bidelman (1965PASP...77..214P), Feast et al. (1972MNRAS.158...23F), Dean (1976AJ.....81..364D), Barnes and Fekel (1977Obs....97....1B), Feast et al. (1980MNRAS.190..227F), Barbier-Brossat and Figon (2000) <III/213>, and are given with respect of the absorption lines. For those radial velocities, which were determined from emission lines the correction has been made along with Ikaunieks (1971) relation: VR(abs) - VR(em) = 0.035 * Period. For 724 Miras both proper motions and radial velocities are available. The stars in the Compiled Catalogue are sorted in the same order as in the General Catalogue of Variable Stars.
293. Compiled Catalogue of Mira-type stars
ID:
ivo://CDS.VizieR/J/BaltA/9/646
Title:
Compiled Catalogue of Mira-type stars
Short Name:
J/BaltA/9/646
Date:
21 Oct 2021
Publisher:
CDS
Description:
The Compiled Catalogue of 1103 Mira type stars is created on the basis of the 4-th edition of the General Catalogue of Variable Stars (GCVS-4, Cat. <II/214>) and present day large high-precision catalogues based on space (Hipparcos-Tycho family catalogues: Hipparcos, Tycho-1 <I/239>, Tycho-2 (<I/259>), ACT RC (Urban et al., 1998AJ....115.2161U), TRC (Cat. <I/250>) and ground-based (CMC11 <I/256>, PPM-N <I/146>, PPM-S <I/193>, PPM-add <I/206>, Kharchenko, 1992, Kinematics and physics of celestial bodies 8, 61) data. Equatorial coordinates were taken from the source catalogues in accordance with the following priority: Hipparcos, Tycho-2, Tycho-1, CMC11, PPM, Kharchenko 1992. The proper motions in the Hipparcos system are calculated for 1041 Miras as mean weighted values of the reduced data from the source catalogues. The radial velocities obtained from absorption lines for 786 Miras were taken from nine catalogues and lists of Feast (1963MNRAS.125..367F, 1966MNRAS.132..495F), Smak and Preston (1965ApJ...142..943S), Perry and Bidelman (1965PASP...77..214P), Feast et al. (1972MNRAS.158...23F), Dean (1976AJ.....81..364D), Barnes and Fekel (1977Obs....97....1B), Feast et al. (1980MNRAS.190..227F), Barbier-Brossat and Figon (2000, Cat. <III/213>). Some radial velocities were determined from emission lines and corrected using the following formula (Ikaunieks, 1971, Long period variable stars, Zinante, Riga): V_R(abs) - V_R(em) = 0.035 * Period. For 724 Miras both proper motions and radial velocities are available. Miras in the Compiled Catalogue are sorted in the same order as in GCVS-4.
294. Constant Stars in the GCVS. II.
ID:
ivo://CDS.VizieR/J/PASP/108/1105
Title:
Constant Stars in the GCVS. II.
Short Name:
J/PASP/108/1105
Date:
21 Oct 2021
Publisher:
CDS
Description:
Photometric observations have been made of 36 stars classified as CST or CST: in the General Catalogue of Variable Stars. Six of these stars are found to vary and three others were deemed possible variables. Of the certain variables, two (MR Her and TY Sge) are red pulsators, one (V1585 Cyg) is a rapid irregular variable, one is apparently a short period Cepheid-strip star (V432 Oph), one is an eclipsing binary (AQ Boo) and one is uncertain type (V351 Cyg). The stars we have observed as MR Her and TY Sge are the same ones which were identified on finding charts in the discovery papers suggesting that these stars have intervals of variability and intervals of quiescence. V432 Oph is of special interest because our photometry indicates that it may be either a double mode Cepheid or a peculiar long period RR Lyrae star depending on which of a couple of possible periods turns out to be correct.
295. Cool carbon stars in the halo and Fornax dSph
ID:
ivo://CDS.VizieR/J/A+A/562/A24
Title:
Cool carbon stars in the halo and Fornax dSph
Short Name:
J/A+A/562/A24
Date:
21 Oct 2021
Publisher:
CDS
Description:
The population of cool carbon (C) stars located far from the galactic plane is probably made of debris of small galaxies such as the Sagittarius dwarf spheroidal galaxy (Sgr), which are disrupted by the gravitational field of the Galaxy. We aim to know this population better through spectroscopy, 2MASS photometric colours, and variability data. When possible, we compared the halo results to C star populations in the Fornax dwarf spheroidal galaxy, Sgr, and the solar neighbourhood. We first present a few new discoveries of C stars in the halo and in Fornax. The number of spectra of halo C stars is now 125. Forty percent show H{alpha} in emission. The narrow location in the JHK diagram of the halo C stars is found to differ from that of similar C stars in the above galaxies. The light curves of the Catalina and LINEAR variability databases were exploited to derive the pulsation periods of 66 halo C stars. A few supplementary periods were obtained with the TAROT telescopes. We confirm that the period distribution of the halo strongly resembles that of Fornax, and we found that it is very different from the C stars in the solar neighbourhood. There is a larger proportion of short-period Mira/SRa variables in the halo than in Sgr, but the survey for C stars in this dwarf galaxy is not complete, and the study of their variability needs to be continued to investigate the link between Sgr and the cool halo C stars.
296. Coralie radial velocities for l Car
ID:
ivo://CDS.VizieR/J/MNRAS/455/4231
Title:
Coralie radial velocities for l Car
Short Name:
J/MNRAS/455/4231
Date:
21 Oct 2021
Publisher:
CDS
Description:
Baade-Wesselink-type (BW) techniques enable geometric distance measurements of Cepheid variable stars in the Galaxy and the Magellanic clouds. The leading uncertainties involved concern projection factors required to translate observed radial velocities (RVs) to pulsational velocities and recently discovered modulated variability. We carried out an unprecedented observational campaign involving long-baseline interferometry (VLTI/PIONIER) and spectroscopy (Euler/Coralie) to search for modulated variability in the long-period (P~35.5d) Cepheid {ell} Carinae. We determine highly precise angular diameters from squared visibilities and investigate possible differences between two consecutive maximal diameters, {Delta}_max_{Theta}. We characterize the modulated variability along the line of sight using 360 high-precision RVs. Here we report tentative evidence for modulated angular variability and confirm cycle-to-cycle differences of {ell} Carinae's RV variability. Two successive maxima yield {Delta}_max_{Theta}=13.1+/-0.7(stat.){mu}as for uniform disc models and 22.5+/-1.4(stat.){mu}as (4 percent of the total angular variation) for limb-darkened models. By comparing new RVs with 2014 RVs, we show modulation to vary in strength. Barring confirmation, our results suggest the optical continuum (traced by interferometry) to be differently affected by modulation than gas motions (traced by spectroscopy). This implies a previously unknown time dependence of projection factors, which can vary by 5 percent between consecutive cycles of expansion and contraction. Additional interferometric data are required to confirm modulated angular diameter variations. By understanding the origin of modulated variability and monitoring its long-term behaviour, we aim to improve the accuracy of BW distances and further the understanding of stellar pulsations.
297. CoRoT 105288363 Blazhko modulation
ID:
ivo://CDS.VizieR/J/MNRAS/415/1577
Title:
CoRoT 105288363 Blazhko modulation
Short Name:
J/MNRAS/415/1577
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present an analysis of the COnvection, ROtation and planetary Transits (CoRoT) star 105288363, a new Blazhko RR Lyrae star of type RRab (f0=1.7623d^-1^), observed with the CoRoT spacecraft during the second long run in the direction of the Galactic Centre (LRc02, time-base 145d). The CoRoT data are characterized by an excellent time-sampling and a low noise amplitude of 0.07mmag in the 2-12d^-1^ range and allow us to study not only the fine details of the variability of the star, but also long-term changes in the pulsation behaviour and the stability of the Blazhko cycle. We use, among other methods, standard Fourier analysis techniques and O-C diagrams to investigate the pulsational behaviour of the Blazhko star 105288363. In addition to the frequency pattern expected for a Blazhko RR Lyrae star, we find an independent mode (f1=2.984d^-1^) showing a f0/f1 ratio of 0.59 which is similar to that observed in other Blazhko RR Lyrae stars. The bump and hump phenomena are also analysed, with their variations over the Blazhko cycle. We carefully investigated the strong cycle-to-cycle changes in the Blazhko modulation (P_B_=35.6d), which seem to happen independently and partly diametrically in the amplitude and phase modulations. Furthermore, the phasing between the two types of modulations is found to change during the course of the observations.
298. CoRoT Bright Stars Catalogue with variability classes
ID:
ivo://CDS.VizieR/III/282
Title:
CoRoT Bright Stars Catalogue with variability classes
Short Name:
III/282
Date:
22 Feb 2022
Publisher:
CDS
Description:
The CoRoT bright stars catalogue describes the 143 different objects observed during the mission, in the "bright star" field of CoRoT, and their major properties. The almost continuous observations lasted between 20 and 156 days, with a regular 32s sampling time.
299. CoRoT-100866999 frequency analysis
ID:
ivo://CDS.VizieR/J/A+A/556/A87
Title:
CoRoT-100866999 frequency analysis
Short Name:
J/A+A/556/A87
Date:
21 Oct 2021
Publisher:
CDS
Description:
The presence of g- and p-modes allows testing stellar models from the core to the envelope. Moreover, binarity in an eclipsing system constrains the physical parameters of the pulsating star. CoRot ID 100866999 is a relatively large-amplitude hybrid gamma Doradus-delta Scuti star with two clearly distinct frequency domains. The large number of detected frequencies allows a detailed study of the interaction between them. In addition, we can derive the fundamental parameters of both components from the study of the eclipsing light curve. After removing the eclipsing phases, we analyzed the data with the Period04 package up to a signal-to-noise ratio S/N=4. The light curve was then prewhitened with these oscillation frequencies to derive the fundamental parameters of the two components.
300. CoRoT 101155310 light curve
ID:
ivo://CDS.VizieR/J/A+A/528/A147
Title:
CoRoT 101155310 light curve
Short Name:
J/A+A/528/A147
Date:
21 Oct 2021
Publisher:
CDS
Description:
The continuous monitoring of ASAS 192647-0030.0=CoRoT 101155310 ensured from space by the CoRoT (Convection, Rotation and planetary Transits) mission allowed us to detect the fundamental radial mode f1=7.949c/d (with harmonics up to 10f1, and 12 independent terms. Linear combinations were also found and the light curve was solved by means of 61 frequencies (smallest amplitude 0.10mmag). The 22270 CoRoT measurements were performed in the chromatic mode. They span 152 d and cover 1208 consecutive cycles.