- ID:
- ivo://CDS.VizieR/J/ApJS/150/181
- Title:
- Redshifts of 110 radio-loud AGNs
- Short Name:
- J/ApJS/150/181
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We report accurate redshifts of 110 active galaxies (mostly radio-loud objects at z<0.4) observed in the course of a survey to find broad, double-peaked emission lines. These redshifts are measured from the narrow emission lines of these objects and are accurate to at least one part in 10^4^. For each object we determine a redshift from high- and low-ionization lines separately, as well as an average redshift from all the available lines. We find that in about 15% of cases, the low-ionization lines yield a slightly higher redshift than the high-ionization lines; the average redshift difference amounts to a velocity difference of approximately 80km/s. In addition to the redshift measurements we also report revised redshifts for two objects as well as new classifications for three narrow-line objects.
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Search Results
- ID:
- ivo://CDS.VizieR/J/AJ/123/3018
- Title:
- Redshifts of radio-selected poor clusters
- Short Name:
- J/AJ/123/3018
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Multifiber optical spectroscopy has been performed on galaxies in the vicinity of strong, nearby radio galaxies. These radio galaxies were selected from the 3CR and B2 catalogs based on their exclusion from the Abell catalog, which is puzzling given the hypothesis that an external medium is required to confine the radio plasma of such galaxies. Velocities derived from the spectra were used to confirm the existence of groups and poor clusters in the fields of most of the radio galaxies. We find that all radio galaxies with classical Fanaroff-Riley type I morphologies prove to reside in clusters, whereas the other radio galaxies often appear to be recent galaxy-galaxy mergers in regions of low galaxy density. These findings confirm the earlier result that the existence of extended X-ray emission combined with a statistical excess of neighboring galaxies can be used to identify poor clusters associated with radio galaxies.
- ID:
- ivo://CDS.VizieR/J/ApJS/96/343
- Title:
- Redshifts of rich clusters of galaxies
- Short Name:
- J/ApJS/96/343
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present spectroscopic observations and accurate positions for 286 galaxies in clusters taken over several observing sessions, mostly with the DuPont telescope at Las Campanas Observatorv. We derive 165 redshifts of rich clusters of which 130 are apparently new values. Redshifts encompass a wide range out to z=0.27
- ID:
- ivo://CDS.VizieR/J/AJ/134/169
- Title:
- Redshifts of UDF emission-line objects
- Short Name:
- J/AJ/134/169
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present redshifts for 115 emission-line objects in the Hubble Ultra Deep Field identified through the Grism ACS Program for Extragalactic Science (GRAPES) project using the slitless grism spectroscopy mode of the Advanced Camera for Surveys on the Hubble Space Telescope (HST). The sample was selected by an emission-line search on all extracted one-dimensional GRAPES spectra. We identify the emission lines using line wavelength ratios where multiple lines are detected in the grism wavelength range (5800{AA}<~lambda<~9600{AA}), and using photometric redshift information where multiple lines are unavailable. We then derive redshifts using the identified lines.
- ID:
- ivo://CDS.VizieR/J/AJ/124/1266
- Title:
- Redshift survey around Abell 2199
- Short Name:
- J/AJ/124/1266
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Using a redshift survey of 1323 galaxies (1092 new or remeasured) in a region of 95deg^2^ centered on the nearby galaxy cluster Abell 2199, we analyze the supercluster containing A2199, A2197, and an X-ray group.
- ID:
- ivo://CDS.VizieR/J/A+A/337/17
- Title:
- Redshift survey between A548 and A3367
- Short Name:
- J/A+A/337/17
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- In this paper we present the results of a spectroscopic survey of galaxies in an area between the two clusters of galaxies A548 and A3367, suspected to be a close and interacting pair. With the use of multifiber spectroscopy, we measured 180 new velocities of galaxies in the central part of A 3367 and in the external regions of A 548. The redshift histogram shows the presence of three velocity peaks, at v~12000km/s, v~30000km/s and v~40000km/s, respectively. For these we estimate the density excess, the mean velocity, and the velocity dispersion. The first clump corresponds to an elongation of A 548: in particular we found a correspondence between the features of this peak and the substructures of A 548. The second peak has a velocity dispersion which is typical of clusters and the distribution of its members on the plane of the sky corresponds to the highest density peak in A 3367. We therefore suggest that the name A 3367 has to be attributed to this clump. Our general conclusion is that, differently from expected, A 548 and A 3367 do not form a close pair of merging clusters, since the two structures are at significantly different redshifts. Moreover, we found that the complex dynamical structure of A 548 has large coherence, with a projected extension in the range of 1-3h^-1^Mpc.
- ID:
- ivo://CDS.VizieR/J/AJ/116/1573
- Title:
- Redshift Survey Compact Groups
- Short Name:
- J/AJ/116/1573
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Redshift Survey Compact Groups (RSCGs) are tight knots of N>=3 galaxies selected from the CfA2+SSRS2 redshift survey. The selection is based on physical extent and association in redshift space alone. We measured 300 new redshifts of fainter galaxies within 1h^-1^Mpc of 14 RSCGs to explore the relationship between RSCGs and their environments. Thirteen of 14 RSCGs are embedded in overdense regions of redshift space. The systems range from a loose group of five members to an Abell cluster. The remaining group, RSCG 64, appears isolated. RSCGs are isolated and distinct from their surroundings to varying degrees, as are the Hickson compact groups. Among the 13 embedded RSCGs, three are distinct from their general environments (RSCG 9, RSCG 11, and RSCG 85).
- ID:
- ivo://CDS.VizieR/J/ApJS/112/245
- Title:
- Redshift survey for IRAS galaxies
- Short Name:
- J/ApJS/112/245
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This is the third and final paper (Yamada et al., 1993ApJS...89...57Y and Takata et al., Cat. <J/A+AS/104/529>) of our systematic visual search for IRAS galaxies behind the Milky Way at |b|<=15{deg}. This paper presents a catalog of 950 IRAS galaxies with 60{mu}m flux densities larger than 0.6Jy located between l=0{deg} and 150{deg}, of which 293 are newly identified by this search. We made a redshift survey for the identified galaxies and obtained new redshift data of 171 galaxies. We also present newly measured redshifts of 27 IRAS galaxies between l=150{deg} and 225{deg} at |b|<=15{deg}. In this paper we studied the structure of the Local void using IRAS galaxies and galaxies from the Third Reference Catalogue of Bright Galaxies (Cat. <VII/155>) in the region l=30{deg}-120{deg} and b=-50{deg} to +30{deg}. The center of the Local void turned out to be located at l~60{deg}, b~-15{deg}, and cz~2500km/s, and the size is about 2500km/s along the direction toward the center.
- ID:
- ivo://CDS.VizieR/J/ApJ/665/921
- Title:
- Redshift survey in the field of A1689
- Short Name:
- J/ApJ/665/921
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present results of the HST Advanced Camera for Surveys spectroscopic ground-based redshift survey in the field of A1689. We measure 98 redshifts, increasing the number of spectroscopically confirmed objects sixfold. We present two spectra from this catalog of the Sextet Arcs, images that arise from a strongly lensed Lyman break galaxy (LBG) at a redshift of z=3.038. Gravitational lensing by the cluster magnifies its flux by a factor of ~16 and produces six separate images with a total r-band magnitude of r_625_=21.7. The two spectra, each of which represents emission from different regions of the LBG, show HI and interstellar metal absorption lines at the systemic redshift.
- ID:
- ivo://CDS.VizieR/J/ApJ/750/168
- Title:
- Redshift survey in the Subaru GTO2deg^2^ field
- Short Name:
- J/ApJ/750/168
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We use a dense redshift survey in the foreground of the Subaru GTO2deg^2^ weak-lensing field (centered at 16:04:44+43:11'24 (2000) to assess the completeness and comment on the purity of massive halo identification in the weak-lensing map. The redshift survey (published here) includes 4541 galaxies; 4405 are new redshifts measured with the Hectospec on the MMT. Among the weak-lensing peaks with a signal to noise greater than 4.25, 2/3 correspond to individual massive systems; this result is essentially identical to the Geller et al. (2010ApJ...709..832G) test of the Deep Lens Survey (DLS) field F2. The Subaru map, based on images in substantially better seeing than the DLS, enables detection of less massive halos at fixed redshift as expected. We demonstrate that the procedure adopted by Miyazaki et al. (2002ApJ...580L..97M) for removing some contaminated peaks from the weak-lensing map improves agreement between the lensing map and the redshift survey in the identification of candidate massive systems.