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831. New bright periodic variables toward Galactic Bulge
ID:
ivo://CDS.VizieR/J/AcA/60/261
Title:
New bright periodic variables toward Galactic Bulge
Short Name:
J/AcA/60/261
Date:
21 Oct 2021
Publisher:
CDS
Description:
We report on photometric I-band observations of 147 bright (8<I<13) periodic variable stars toward the Galactic bulge including 76 new discoveries. We used one of the HATnet telescopes to obtain 151 exposures spanning 88 nights in 2005 of an 8.4{deg}x8.4{deg} field of view (FOV) approximately centered on (l,b)=(1.73,-4.68). We observed the Galactic bulge in 2005 as part of a microlensing feasibility study, and here we discuss the periodic variable stars we found in our data. Among our discoveries we count 52 new eclipsing binaries and 24 other periodic variable stars.
832. 2 new candidate luminous blue variables
ID:
ivo://CDS.VizieR/J/MNRAS/421/3325
Title:
2 new candidate luminous blue variables
Short Name:
J/MNRAS/421/3325
Date:
21 Oct 2021
Publisher:
CDS
Description:
We report the discovery of two new Galactic candidate luminous blue variable (LBV) stars via detection of circular shells (typical of confirmed and candidate LBVs) and follow-up spectroscopy of their central stars. The shells were detected at 22um in the archival data of the Mid-Infrared All Sky Survey carried out with the Wide-field Infrared Survey Explorer (WISE). Follow-up optical spectroscopy of the central stars of the shells conducted with the renewed Southern African Large Telescope (SALT) showed that their spectra are very similar to those of the well-known LBVs P Cygni and AG Car, and the recently discovered candidate LBV MN112, which implies the LBV classification for these stars as well.
833. New catalog of 1578 {delta} Scuti stars
ID:
ivo://CDS.VizieR/J/AJ/145/132
Title:
New catalog of 1578 {delta} Scuti stars
Short Name:
J/AJ/145/132
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present statistical characteristics of 1578 {delta} Scuti stars including nearby field stars and cluster member stars within the Milky Way. We obtained 46% of these stars (718 stars) from work by Rodriguez and collected the remaining 54% of stars (860 stars) from other literature. We updated the entries with the latest information of sky coordinates, color, rotational velocity, spectral type, period, amplitude, and binarity. The majority of our sample is well characterized in terms of typical period range (0.02-0.25days), pulsation amplitudes (<0.5mag), and spectral types (A-F type). Given this list of {delta} Scuti stars, we examined relations between their physical properties (i.e., periods, amplitudes, spectral types, and rotational velocities) for field stars and cluster members, and confirmed that the correlations of properties are not significantly different from those reported in Rodriguez's work. All the {delta} Scuti stars are cross-matched with several X-ray and UV catalogs, resulting in 27 X-ray and 41 UV-only counterparts. These counterparts are interesting targets for further study because of their uniqueness in showing {delta} Scuti-type variability and X-ray/UV emission at the same time. The compiled catalog can be accessed through the Web interface http://stardb.yonsei.ac.kr/DeltaScuti.
834. New catalog of variable stars in M37 field
ID:
ivo://CDS.VizieR/J/AJ/150/27
Title:
New catalog of variable stars in M37 field
Short Name:
J/AJ/150/27
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present a comprehensive re-analysis of stellar photometric variability in the field of the open cluster M37 following the application of a new photometry and de-trending method to the MMT/Megacam image archive. This new analysis allows a rare opportunity to explore photometric variability over a broad range of timescales, from minutes to a month. The intent of this work is to examine the entire sample of more than 30000 objects for periodic, aperiodic, and sporadic behaviors in their light curves. We show a modified version of the fast {chi}^2^ periodogram algorithm (F{chi}^2^) and change-point analysis as tools for detecting and assessing the significance of periodic and non-periodic variations. The benefits of our new photometry and analysis methods are evident. A total of 2306 stars exhibit convincing variations that are induced by flares, pulsations, eclipses, starspots, and unknown causes in some cases. This represents a 60% increase in the number of variables known in this field. Moreover, 30 of the previously identified variables are found to be false positives resulting from time-dependent systematic effects. The new catalog includes 61 eclipsing binary systems, 92 multiperiodic variable stars, 132 aperiodic variables, and 436 flare stars, as well as several hundreds of rotating variables. Based on extended and improved catalog of variables, we investigate the basic properties (e.g., period, amplitude, type) of all variables. The catalog can be accessed through the web interface (http://stardb.yonsei.ac.kr/).
835. New Catalogue of Suspected Variable Stars
ID:
ivo://CDS.VizieR/II/140
Title:
New Catalogue of Suspected Variable Stars
Short Name:
II/140
Date:
21 Oct 2021
Publisher:
CDS
Description:
This file mainly provides a standardized description of the tabular material composing the NSV catalogue; please refer to files: * "intro": the original 1981 introduction by the authors * "adc.doc" (plain ascii) or "doc.tex" (LaTeX version): the documentation for the machine-readable version by W.H. Warren
836. New Catalogue of Suspected Variable Stars Supplement
ID:
ivo://CDS.VizieR/II/219
Title:
New Catalogue of Suspected Variable Stars Supplement
Short Name:
II/219
Date:
21 Oct 2021
Publisher:
CDS
Description:
This catalog is a compilation of 11206 stars suspected of variability and not finally designated as variables prior to 1997. It is the supplementary part to the "New Catalogue of Suspected Variable Stars" published in 1982 (Kukarkin et al., file "nsv.dat" included here). Data contained in the present catalog include positions, magnitudes, variability types, references to the literature, spectra and cross-identifications. The computer version of the NSV Supplement contains principally the same data as the printed catalog, the data tables with the textual material (bibliography, remarks) are included.
837. New Doppler velocity measurements of GJ 876
ID:
ivo://CDS.VizieR/J/AJ/155/106
Title:
New Doppler velocity measurements of GJ 876
Short Name:
J/AJ/155/106
Date:
21 Oct 2021
Publisher:
CDS
Description:
Gliese 876 harbors one of the most dynamically rich and well-studied exoplanetary systems. The nearby M4V dwarf hosts four known planets, the outer three of which are trapped in a Laplace mean-motion resonance. A thorough characterization of the complex resonant perturbations exhibited by the orbiting planets, and the chaotic dynamics therein, is key to a complete picture of the system's formation and evolutionary history. Here we present a reanalysis of the system using 6 yr of new radial velocity (RV) data from four instruments. These new data augment and more than double the size of the decades-long collection of existing velocity measurements. We provide updated estimates of the system parameters by employing a computationally efficient Wisdom-Holman N-body symplectic integrator, coupled with a Gaussian process (GP) regression model to account for correlated stellar noise. Experiments with synthetic RV data show that the dynamical characterization of the system can differ depending on whether a white-noise or correlated-noise model is adopted. Despite there being a region of stability for an additional planet in the resonant chain, we find no evidence for one. Our new parameter estimates place the system even deeper into resonance than previously thought and suggest that the system might be in a low-energy, quasi-regular double apsidal corotation resonance. This result and others will be used in a subsequent study on the primordial migration processes responsible for the formation of the resonant chain.
838. New elements for 80 eclipsing binaries V.
ID:
ivo://CDS.VizieR/J/other/IBVS/5586
Title:
New elements for 80 eclipsing binaries V.
Short Name:
J/other/IBVS/558
Date:
21 Oct 2021
Publisher:
CDS
Description:
This research presents new elements for 80 eclipsing binaries found with the help of the ASAS-3 (Cat. <II/264>), Hipparcos (Cat. <I/239>) and NSVS (2004AJ....127.2436W) databases.
839. New light elements for 28 red periodic var.
ID:
ivo://CDS.VizieR/J/other/PZP/9.6
Title:
New light elements for 28 red periodic var.
Short Name:
J/other/PZP/9.6
Date:
21 Oct 2021
Publisher:
CDS
Description:
We could study the variables thanks to the publicly available electronic archives of CCD observations of the ASAS-3 project (Pojmanski 2002, Cat. <II/264>) and to images of the US Naval Observatory Image and Catalogue Archive (https://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/icas). We recovered the variables NSV 07168, NSV 07291, NSV 07352, NSV 07388 and NSV 07406 suspected by Luyten (1933AN....249..395L); NSV 07161, NSV 07188, NSV 07203, NSV 07208, NSV 07260, NSV 07286, NSV 07347, NSV 07387, NSV 07392 and NSV 07422 suspected by Luyten (1933AN....250..259L); NSV 07130, NSV 07228, NSV 07238 and NSV 07425 suspected by Luyten (1934AN....253..135L); NSV 07117, NSV 07131, NSV 07137 and NSV 07382 suspected by Luyten (1935AN....256..325L); NSV 07411 suspected by Luyten (1936AN....258..121L); NSV 07309 suspected by Luyten (1937AN....261..451L); NSV 07353 suspected by Luyten (1937AN....263..181L). Finding charts for these suspected variables have never been published.
840. New Miras in Galactic Bulge
ID:
ivo://CDS.VizieR/J/other/OEJV/149
Title:
New Miras in Galactic Bulge
Short Name:
J/other/OEJV/149
Date:
21 Oct 2021
Publisher:
CDS
Description:
500 new Mira variables in the direction of the Galactic Bulge are presented, which were found in the MACHO database.