- ID:
- ivo://CDS.VizieR/J/A+A/444/831
- Title:
- New star clusters in M33
- Short Name:
- J/A+A/444/831
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- In this work we present the detection of 33 star clusters and 51 candidates in one field of the near by galaxy M 33. This study is based on WFC/ACS images available from the HST archive. Thanks to the high resolving power, we were able to confirm that two candidates previously indicated by Christian & Schommer (1982ApJS...49..405C) are indeed star clusters. We list the main properties for the star clusters (and candidates), along with some peculiar objects, such as background galaxies and possible HII regions.
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Search Results
- ID:
- ivo://CDS.VizieR/J/A+A/373/899
- Title:
- New variables in M22 globular cluster
- Short Name:
- J/A+A/373/899
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- File table1 contains equatorial coordinates for 36 newly identified variables from the central field of the globular cluster M22. File table2 contains basic photometric data for SX Phe stars reported in the paper. File table3 contains magnitudes and colors for selected sample of new variables. Files table4-39 contain V-band time-series photometry for 36 newly identified variables from the central field of the globular cluster M22. Individual finding charts for new variables are in fig directory; each chart is 33arcsec on a side with north up and east to the left.
- ID:
- ivo://CDS.VizieR/J/A+AS/123/507
- Title:
- New variables in Sagittarius
- Short Name:
- J/A+AS/123/507
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- For the coordinates and identification charts of the variables discovered in the other parts of the surveyed region, see references in the publication. A compilation of all the (~4000) variables discovered in the entire 100 square-degree surveyed region in the course of this programme, is in preparation and will be available at CDS in electronic form.
- ID:
- ivo://CDS.VizieR/J/other/JDSO/6.30
- Title:
- New Wide Common Proper Motion Binaries
- Short Name:
- J/other/JDSO/6.3
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- In this work we report the discovery of 150 new double stars of which 142 are wide common proper motion stellar systems. In addition to this, we report the study of 23 recently catalogued wide common proper motion binaries discovered by other observers. Spectral types, photometric distances, kinematics and ages were determined from data obtained consulting the literature. Several criteria were used to determine the nature of each double star. Orbital periods and the semimajor axes were calculated.
- ID:
- ivo://CDS.VizieR/J/AJ/130/1502
- Title:
- NGC 5846 group: photometry and spectroscopy
- Short Name:
- J/AJ/130/1502
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We conduct a photometric and spectroscopic survey of a 10{deg}^2^ region surrounding the nearby NGC 5846 group of galaxies, using the Canada-France-Hawaii and Keck I telescopes to study the population of dwarf galaxies as faint as M_R_=-10. Candidates are identified on the basis of quantitative surface brightness and qualitative morphological criteria. Spectroscopic follow up and a spatial correlation analysis provide the basis for affirming group memberships. Altogether, 324 candidates are identified, and 83 have spectroscopic membership confirmation.
- ID:
- ivo://CDS.VizieR/J/MNRAS/468/2816
- Title:
- NGC6397 low-mass variable stars
- Short Name:
- J/MNRAS/468/2816
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We have conducted a photometric survey of the globular cluster NGC 6397 in a search for variable stars. We obtained ~11h of time-resolved photometric images with one European Southern Observatory-Very Large Telescope using the FOcal Reducer and low dispersion Spectrograph imager distributed over two consecutive nights. We analysed 8391 light curves of stars brighter than magnitude 23 with the 465-nm filter, and we identified 412 variable stars, reaching ~4.8+/-0.2 per cent of variability with time-scales between 0.004 and 2d, with amplitudes variation greater than +/-0.2mag.
- ID:
- ivo://CDS.VizieR/J/other/RMxAA/33.83
- Title:
- NGC 129 positions and proper motions
- Short Name:
- J/other/RMxAA/33
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Positions and magnitudes were derived for 537 stars in the area of the open cluster NGC 129. Combining these positions with data from the three other sources, proper motions could be derived for 86 stars.
- ID:
- ivo://CDS.VizieR/J/ApJ/859/52
- Title:
- NGFS. III. Dwarf galaxies in outer regions
- Short Name:
- J/ApJ/859/52
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We report the discovery of 271 previously undetected dwarf galaxies in the outer Fornax cluster regions at radii r_vir_/4<r<r_vir_/2 using data from the Next Generation Fornax Survey (NGFS) with deep coadded u', g', and i' images obtained with Blanco/DECam at Cerro Tololo Interamerican Observatory. From the 271 dwarf candidates, we find 39 to be nucleated. Together with our previous study of the central Fornax region, the new dwarfs detected with NGFS data number 392, of which 56 are nucleated. The total Fornax dwarf galaxy population from NGFS and other catalogs rises, therefore, to a total of 643 with 181 being nucleated, yielding an overall nucleation fraction of 28%. The absolute i'-band magnitudes for the outer NGFS dwarfs are in the range -18.80<=M_i'_<=-8.78 with effective radii r_eff,i'_=0.18-2.22kpc and an average Sersic index <n>_i'_=0.81. Nonnucleated dwarfs are found to be fainter and smaller by {Delta}<M_i'_>=2.25mag and {Delta}<r_eff,i'_>=0.4kpc than the nucleated dwarfs. We demonstrate a significant clustering of dwarf galaxies on scales <~100kpc, and projected surface number density profile estimates, {Sigma}_N_(r), show a concentration of dwarfs in the Fornax core region within r<~350kpc. {Sigma}_N_(r) has a flat distribution up to ~350kpc, beyond which it declines for the nonnucleated dwarfs. The nucleated dwarfs have a steeper {Sigma}N(r) distribution, are more concentrated toward NGC 1399, and are decreasing rapidly outwards. This is the first time the transition from cluster to field environment has been established for the very faint dwarf galaxy population with robust sample statistics.
- ID:
- ivo://CDS.VizieR/J/ApJS/175/86
- Title:
- NGP+30{deg} zone galaxies I.
- Short Name:
- J/ApJS/175/86
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- A database containing 618 active and star-forming (A/SF) galaxies and 564 normal galaxies in a 120{deg}x6{deg} wide strip crossing the North Galactic Pole was constructed in order to compare the global properties of "active" galaxies against a control sample of "normal" galaxies. This database combines a literature and catalog search with new optical measurements from the Fpg (red) and Jpg (blue) band images of the STScI Digitized Sky Survey (DSS). We provide alternative names, accurate coordinates, morphological type, activity classes, red and blue apparent magnitudes, 2MASS near-infrared J-H and H-K colors, apparent diameters, axial ratios, position angles, and number counts of neighboring objects in a circle of radius 50kpc. We also present an atlas of 103 interacting and merging systems among these galaxies. In this sample, all merging and interacting galaxies are A/SF objects. The near-infrared colors of the sample galaxies are independent parameters and do not correlate with activity level or any other parameter of the galaxies.
- ID:
- ivo://CDS.VizieR/J/ApJ/878/18
- Title:
- NGVS. XXIII. Nuclear star clusters
- Short Name:
- J/ApJ/878/18
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Using deep, high-resolution optical imaging from the Next Generation Virgo Cluster Survey, we study the properties of nuclear star clusters (NSCs) in a sample of nearly 400 quiescent galaxies in the core of Virgo with stellar masses 10^5^<~M*/M_{sun}_<~10^12^. The nucleation fraction reaches a peak value f_n_~90% for M*~10^9^M_{sun}_ galaxies and declines for both higher and lower masses, but nuclei populate galaxies as small as M*~5x10^5^M_{sun}_. Comparison with literature data for nearby groups and clusters shows that at the low-mass end nucleation is more frequent in denser environments. The NSC mass function peaks at M_NSC_~7x10^5^M_{sun}_, a factor 3-4 times larger than the turnover mass for globular clusters (GCs). We find a nonlinear relation between the stellar masses of NSCs and those of their host galaxies, with a mean nucleus-to-galaxy mass ratio that drops to M_NSC_/M*~3.6x10^-3^ for M*~5x10^9^M_{sun}_ galaxies. Nuclei in both more and less massive galaxies are much more prominent: M_NSC_{propto}M_*_^0.46^ at the low-mass end, where nuclei are nearly 50% as massive as their hosts. We measure an intrinsic scatter in NSC masses at a fixed galaxy stellar mass of 0.4dex, which we interpret as evidence that the process of NSC growth is significantly stochastic. At low galaxy masses we find a close connection between NSCs and GC systems, including very similar occupation distributions and comparable total masses. We discuss these results in the context of current dissipative and dissipationless models of NSC formation.
