- ID:
- ivo://CDS.VizieR/J/AN/327/365
- Title:
- Clusters and groups of galaxies in 2dF
- Short Name:
- J/AN/327/365
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We create a new catalogue of groups and clusters, applying the friends-to-friends method to the 2dF GRS final release. We investigate various selection effects due to the use of a magnitude limited sample. For this purpose we follow the changes in group sizes and mean galaxy number densities within the groups when shifting nearby observed groups to larger distances. We study the distribution of sizes of dark matter haloes in N-body simulations and compare properties of these haloes and the 2dF groups.
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Search Results
- ID:
- ivo://CDS.VizieR/J/ApJ/767/51
- Title:
- Clusters of starburst galaxy NGC4214
- Short Name:
- J/ApJ/767/51
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The production rate of ionizing photons in young (<=8Myr), unresolved stellar clusters in the nearby irregular galaxy NGC 4214 is probed using multi-wavelength Hubble Space Telescope WFC3 data. We normalize the ionizing photon rate by the cluster mass to investigate the upper end of the stellar initial mass function (IMF). We have found that within the uncertainties the upper end of the stellar IMF appears to be universal in this galaxy, and that deviations from a universal IMF can be attributed to stochastic sampling of stars in clusters with masses {<~}10^3^M_{sun}_. Furthermore, we have found that there does not seem to be a dependence of the maximum stellar mass on the cluster mass. We have also found that for massive clusters, feedback may cause an underrepresentation in H{alpha} luminosities, which needs to be taken into account when conducting this type of analysis.
663. CMD for And III
- ID:
- ivo://CDS.VizieR/J/AJ/106/986
- Title:
- CMD for And III
- Short Name:
- J/AJ/106/986
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The prime focus CCD camera of the KPNO 4 m telescope has been used to image Andromeda III, a dwarf spheroidal galaxy companion to M31, in the V and I bands. The resulting color-magnitude diagram shows a well defined giant branch whose tip luminosity corresponds to that expected for an old metal-poor population at the distance of M31. By comparing these data with the giant branches of metal-poor population at the distance of M31. By comparing these data with the giant branches of Galactic globular clusters, we determine that the abundance of And III is [Fe/H]=-2.0+/-0.15; with this abundance And III lies on the luminosity-abundance relation defined by the Galactic dwarf spheroidal galaxies. There is some evidence for a small (0.16<{sigma}([Fe/H])<0.24) intrinsic abundance dispersion within And III, but we are unable to unambiguously establish its presence. A study of the And III I-band luminosity function yields a distance modulus (m-M)_0_ of 24.4+/-0.2 for this galaxy, and indicates that the fraction of intermediate-age (3 to 10Gyr) population in And III is approximately 10+/-10 percent. In all these aspects And III, like And I, is similar to the Galactic dwarf spheroidal systems, indicating that M31 and the Galaxy provided similar conditions for the evolution of such galaxies.
- ID:
- ivo://CDS.VizieR/J/A+A/465/71
- Title:
- 21cm observations of 452 galaxies
- Short Name:
- J/A+A/465/71
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This paper presents 452 new 21-cm neutral hydrogen line measurements carried out with the FORT receiver of the meridian transit Nancay radiotelescope (NRT) in the period April 2003-March 2005. This observational programme is part of a larger project aiming at collecting an exhaustive and magnitude-complete HI extragalactic catalogue for Tully-Fisher applications (the so-called KLUN project, for Kinematics of the Local Universe studies, end in 2008). The whole on-line HI archive of the NRT contains today reduced HI-profiles for ~4500 spiral galaxies of declination delta >-40{deg} (http://klun.obs-nancay.fr). As an example of application, we use direct Tully-Fisher relation in three (JHK) bands in deriving distances to a large catalog of 3126 spiral galaxies distributed through the whole sky and sampling well the radial velocity range between 0 and 8000km/s. Thanks to an iterative method accounting for selection bias and smoothing effects, we show as a preliminary output a detailed and original map of the velocity field in the Local Universe.
- ID:
- ivo://CDS.VizieR/J/A+A/517/A54
- Title:
- 20cm survey of the AKARI NEP
- Short Name:
- J/A+A/517/A54
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The Westerbork Radio Synthesis Telescope, WSRT, has been used to make a deep radio survey of an ~1.7degree^2^ field coinciding with the AKARI north ecliptic pole deep field. The observations, data reduction and source count analysis are presented, along with a description of the overall scientific objectives. The survey consisted of 10 pointings, mosaiced with enough overlap to maintain a similar sensitivity across the central region that reached as low as 21uJy/beam at 1.4GHz.
- ID:
- ivo://CDS.VizieR/J/ApJS/102/289
- Title:
- CNOC cluster redshift survey catalogs. II.
- Short Name:
- J/ApJS/102/289
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- A photometric and redshift catalog of galaxies in the field of the rich galaxy cluster Abell 2390 (z=0.228) is presented as part of the Canadian Network for Observation Cosmology (CNOC) cluster redshift survey carried out at the Canada-France-Hawaii Telescope (CFHT) using the MOS imaging multiobject spectrograph. Using five separate fields, the imaging and spectroscopic observations cover a strip of approximately 7.3'x43.2', centered on the cluster. Redshifts for 327 galaxies, primarily ranging in magnitude from r=17 to 22, were obtained. The data set is also presented graphically in several forms. The magnitude, geometric, and color selection functions for the redshift sample are discussed and presented.
- ID:
- ivo://CDS.VizieR/J/ApJS/113/1
- Title:
- CNOC cluster redshift survey catalogs. III.
- Short Name:
- J/ApJS/113/1
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- A photometric and redshift catalog of galaxies in the field of two rich galaxy clusters, MS 1621.5+2640 (z=0.4275) and MS 0302.7+1658 (z=0.4245), is presented as part of the Canadian Network for Observation Cosmology (CNOC) Cluster Redshift Survey carried out at the Canada-France-Hawaii Telescope (CFHT) using the MOS imaging multiobject spectrograph. The imaging and spectroscopic observations cover strips cantered on each cluster of approximately 23.3'x9.0', and 7.9'x9.0', for MS 1621.5+2640 and MS 0302.7+1658, respectively. Redshifts for 371 galaxies, primarily ranging in magnitude from r=20 to 22, were obtained. The data set is also presented graphically in several forms. The magnitude, color, and geometric selection functions for the redshift sample are presented and discussed.
- ID:
- ivo://CDS.VizieR/J/ApJS/116/211
- Title:
- CNOC cluster redshift survey catalogs. IV.
- Short Name:
- J/ApJS/116/211
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Photometric and redshift catalogs of galaxies in the field of two rich galaxy clusters, MS 1358.4+6245 (z=0.328) and MS 1008.1-1224 (z=0.306), are presented as part of the Canadian Network for Observation Cosmology (CNOC) cluster redshift survey carried out at the Canada-France-Hawaii Telescope (CFHT) using the MOS imaging multiobject spectrograph. The imaging and spectroscopic observations cover a mosaic of three MOS fields in the north-south direction of a total area of approximately 23.3'x9.0' for MS 1358.4+6245 and a single field of 7.9'x9.0' for MS 1008.1-1224. Redshifts for 361 galaxies, primarily ranging in magnitude from r=20 to r=22, and Gunn r and g photometry for 3015 galaxies to r=24mag were obtained. The data set is also presented graphically in several forms. The magnitude, color, and geometric selection functions for the redshift sample are presented and discussed.
- ID:
- ivo://CDS.VizieR/J/ApJS/116/231
- Title:
- CNOC cluster redshift survey catalogs. V.
- Short Name:
- J/ApJS/116/231
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Photometric and redshift catalogs of galaxies in the field of two rich galaxy clusters: MS 1224.7+2007 (z=0.327) and MS 1512.4+3647 (z=0.372) are presented as part of the Canadian Network for Observation Cosmology (CNOC) cluster redshift survey carried out at the Canada-France-Hawaii Telescope (CFHT) using the MOS imaging multiobject spectrograph. The imaging and spectroscopic observations span three contiguous MOS fields in the east-west direction for MS 1512.4+3647, covering a total area of approximately 8.0'x27.3'. A single field of 7.1'x9.0' was obtained for MS 1224.7+2007. Redshifts for 287 galaxies in the MS 1512.4+3647 fields and 75 galaxies in the MS 1224.7+2007 field (primarily ranging in magnitude from r=18-22) were obtained. The spectroscopic information in this paper is supplemented by photometric information for all galaxies in the fields down to Gunn r=21mag. The data set is also presented graphically in several forms. The magnitude, color, and geometric selection functions for the redshift sample are presented and discussed.
- ID:
- ivo://CDS.VizieR/J/ApJS/116/247
- Title:
- CNOC cluster redshift survey catalogs. VI.
- Short Name:
- J/ApJS/116/247
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- A photometric and redshift catalog of galaxies in the field of two rich galaxy clusters, MS 0015.9+1609 (z=0.5481) and MS 0451.5-0305 (z=0.5386), is presented as part of the Canadian Network for Observation Cosmology (CNOC) cluster redshift survey carried out at the Canada-France-Hawaii Telescope (CFHT) using the MOS imaging multiobject spectrograph. The imaging and spectroscopic observations cover a single field of approximately 7.6'x9.1', centered on each cluster. Redshifts for 247 galaxies, primarily ranging in magnitude from r=20 to r=22, were obtained. The data set is also presented graphically in several forms. The magnitude, color, and geometric selection functions for the redshift sample are presented and discussed.
