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4471. NGC 362 variable V light curves
ID:
ivo://CDS.VizieR/J/AcA/66/307
Title:
NGC 362 variable V light curves
Short Name:
J/AcA/66/307
Date:
21 Oct 2021
Publisher:
CDS
Description:
The field of the globular cluster NGC 362 was monitored between 1997 and 2015 in a search for variable stars. BV light curves were obtained for 151 periodic or likely periodic variable stars, over a hundred of which are new detections. Twelve newly detected variable stars are proper-motion members of the cluster: two SX Phe and two RR Lyr pulsators, one contact binary, three detached or semi-detached eclipsing binaries, and four spotted variable stars. The most interesting objects among these are the binary blue straggler V20 with an asymmetric light curve, and the 8.1d semidetached binary V24 located on the red giant branch of NGC 362, which is a Chandra X-ray source. We also provide substantial new data for 24 previously known variable stars.
4472. NGC 1750 + 1758 Vilnius photometry
ID:
ivo://CDS.VizieR/J/BaltA/12/323
Title:
NGC 1750 + 1758 Vilnius photometry
Short Name:
J/BaltA/12/323
Date:
21 Oct 2021
Publisher:
CDS
Description:
Seven-color photometry in the Vilnius system has been obtained for 420 stars down to V=16mag in the area containing the overlapping open clusters NGC 1750 and NGC 1758 in Taurus. Spectral and luminosity classes, color excesses, interstellar extinctions and distances are given for 287 stars. The classification of stars is based on their reddening-free Q-parameters. 18 stars observed photoelectrically were used as standards.
4473. NGC 752 Vilnius photometry
ID:
ivo://CDS.VizieR/J/BaltA/20/27
Title:
NGC 752 Vilnius photometry
Short Name:
J/BaltA/20/27
Date:
21 Oct 2021
Publisher:
CDS
Description:
We have performed multicolor CCD observations of the central area of NGC 752 to search for faint, low-mass members of this open cluster. Four 12'x12' fields were taken on the 1.8m Vatican Advanced Technology Telescope (Mt. Graham, Arizona) using a 4K CCD camera and eight intermediate-band filters of the Stromvil (Stromgren + Vilnius) system. In this paper we present a catalog of photometry for 405 stars down to the limiting magnitude V=18.5, which contains V magnitudes and color indices of the Vilnius system, together with photometric determinations of spectral types, absolute magnitudes MV , interstellar reddening values E(Y-V) and metallicity parameters [Fe/H]. The good quality multicolor data made it possible to identify the locus of the lower main sequence to four magnitudes beyond the previous (photographic) limit. A relatively small number of photometric members identified at faint magnitudes seems to be indicative of actual dissolution of the cluster from the low-mass end.
4474. NGC 752 Vilnius photometry
ID:
ivo://CDS.VizieR/J/BaltA/19/35
Title:
NGC 752 Vilnius photometry
Short Name:
J/BaltA/19/35
Date:
21 Oct 2021
Publisher:
CDS
Description:
The results of CCD photometry in the seven-color Vilnius system of 3058 stars down to V~18.0mag in a 1.5 square degree field around the cluster NGC752 are presented. For most of the stars brighter than V=17.0mag, photometric spectral and luminosity classes are determined. The catalog of 1174 stars down to V=15.5mag is given in the paper. The entire catalog will be available at the CDS Simbad database. The color-magnitude diagram indicates an extension of the cluster's main sequence down to 5mag below the turnoff point.
4475. NGC 7129 Vilnius photometry
ID:
ivo://CDS.VizieR/J/MNRAS/438/1848
Title:
NGC 7129 Vilnius photometry
Short Name:
J/MNRAS/438/1848
Date:
21 Oct 2021
Publisher:
CDS
Description:
The dust cloud TGU H645 P2 and embedded in it the young open cluster NGC 7129 are investigated using the results of medium-band photometry of 159 stars in the Vilnius seven-colour system down to V=18.8mag. The photometric data were used to classify about 50 per cent of the measured stars in spectral and luminosity classes. The extinction A_V_ versus distance diagram for the 20'x20' area is plotted for 155 stars with two-dimensional classification from the present and the previous catalogues. The extinction values are found in the range between 0.6 and 3.4mag. However, some red giants, located in the direction of the dense parts of the cloud, exhibit the infrared extinction equivalent up to A_V_=13mag. The distance to the cloud (and the cluster) is found to be 1.15kpc (the true distance modulus 10.30mag). For determining the age of NGC 7129, a luminosity versus temperature diagram for six cluster members of spectral classes B3-A1 was compared with the Pisa pre-main-sequence evolution tracks and the Palla birthlines. The cluster can be as old as about 3Myr, but star formation continues till now as witnessed by the presence in the cloud of many younger pre-main-sequence objects identified with photometry from 2MASS, Spitzer and WISE infrared surveys.
4476. NGC 7142 Vilnius photometry
ID:
ivo://CDS.VizieR/J/MNRAS/437/1628
Title:
NGC 7142 Vilnius photometry
Short Name:
J/MNRAS/437/1628
Date:
21 Oct 2021
Publisher:
CDS
Description:
The results of medium-band photometry of 1037 stars in the area of the old open cluster NGC 7142 down to V=20.1mag in the Vilnius seven-colour system are presented. Photometric results are used to classify in spectral and luminosity classes about 80 per cent of stars down to V=18.5mag, to identify cluster members, to determine the main cluster parameters and to investigate the interstellar extinction in this direction. The average extinction A_V_ of the cluster is about 1.1mag [E(B-V)=0.35], and its distance is 2.3kpc (the distance modulus 11.8mag). The age of the cluster, 3.0Gyr, is estimated from the intrinsic colour-magnitude diagram with individual dereddening of each star and the Padova isochrones. The surface distribution of the extinction is shown. The reddening of the eclipsing variable V375 Cep is found to be close to the average reddening of the cluster. Probably, the cluster contains five red clump giants, two asymptotic branch stars and four blue stragglers.
4477. NGC 6441 VI photometry
ID:
ivo://CDS.VizieR/J/AJ/117/1313
Title:
NGC 6441 VI photometry
Short Name:
J/AJ/117/1313
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present time-series VI photometry of the metal-rich ([Fe/H]=-0.53) globular cluster NGC 6441. Our color-magnitude diagram shows that the extended blue horizontal branch seen in Hubble Space Telescope data exists in the outermost reaches of the cluster.
4478. NGC 2264: VRIH{alpha} photometry
ID:
ivo://CDS.VizieR/J/AJ/128/1684
Title:
NGC 2264: VRIH{alpha} photometry
Short Name:
J/AJ/128/1684
Date:
21 Oct 2021
Publisher:
CDS
Description:
The young open cluster NGC 2264 was observed on 2002 January 67 with the CFH12K mosaic CCD on the 3.6m Canada-France-Hawaii Telescope to investigate the shape of the initial mass function (IMF). In order to select the pre-main-sequence (PMS) members more completely, Chandra X-Ray Observatory archival data were retrieved and used for the identification of X-ray-emitting weak-line T Tauri stars. In addition, the (R-I, V-I) diagram was used to exclude background late-type giants, and a statistical approach was applied to estimate the number of contaminating foreground main-sequence stars.
4479. NGC 188 V12 VI light curves
ID:
ivo://CDS.VizieR/J/AJ/137/5086
Title:
NGC 188 V12 VI light curves
Short Name:
J/AJ/137/5086
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present time series radial velocity, and photometric observations of a solar-type double-lined eclipsing binary star (V12) in the old open cluster NGC 188. We use these data to determine the spectroscopic orbit and the photometric elements for V12.
4480. NGC 3503 YSO candidates
ID:
ivo://CDS.VizieR/J/A+A/565/A30
Title:
NGC 3503 YSO candidates
Short Name:
J/A+A/565/A30
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present here a follow-up study of the molecular gas and dust in the environs of the star forming region NGC 3503. This study aims at dealing with the interaction of the HII region NGC 3503 with its parental molecular cloud, and also with the star formation in the region, that was possibly triggered by the expansion of the ionization front against the parental cloud. To analyze the molecular gas we use CO(J=2-->1), ^13^CO(J=2-->1), C^18^O(J=2-->1), and HCN(J=3-->2) line data obtained with the on-the-fly technique from the APEX telescope. To study the distribution of the dust, we make use of unpublished images at 870um from the ATLASGAL survey and IRAC-GLIMPSE archival images. We use public 2MASS and WISE data to search for infrared candidate young stellar objects (YSOs) in the region.