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3341. Southern GEMS groups. II.
ID:
ivo://CDS.VizieR/J/MNRAS/400/1962
Title:
Southern GEMS groups. II.
Short Name:
J/MNRAS/400/1962
Date:
21 Oct 2021
Publisher:
CDS
Description:
We investigate the neutral hydrogen (HI) content of 16 groups for which we have multiwavelength data including X-ray observations. Wide-field imaging of the groups was obtained with the 20cm multibeam system on the 64m Parkes telescope. We have detected 10 previously uncatalogued HI sources, one of which has no visible optical counterpart. We examine the HI properties of the groups, compared to their X-ray characteristics, finding that those groups with a higher X-ray temperature and luminosity contain less HI per galaxy.
3342. Southern isolated triple systems of galaxies
ID:
ivo://CDS.VizieR/J/AZh/77/569
Title:
Southern isolated triple systems of galaxies
Short Name:
J/AZh/77/569
Date:
21 Oct 2021
Publisher:
CDS
Description:
Using the ESO/SERC and POSS-I surveys we selected 76 isolated triple systems of galaxies with DE<-3{deg}. For each triplet the equatorial coordinates, type of configuration, angular diameters, apparent angular separation of the components, morphological types, total magnitudes and other characteristics are presented.
3343. Southern Milky Way galaxies velocities
ID:
ivo://CDS.VizieR/J/MNRAS/287/472
Title:
Southern Milky Way galaxies velocities
Short Name:
J/MNRAS/287/472
Date:
21 Oct 2021
Publisher:
CDS
Description:
A redshift survey of galaxies located in the direction of the southern Milky Way has been carried out using the FLAIR multi-objects system on the 1.2-m UK Schmidt Telescope (UKST) at the Anglo-Australian Observatory in Australia. The galaxy sample was extracted from the LEDA (<http://www-obs.univ-lyon1.fr/base/>) and COSMOS (Cat. <J/A+AS/117/519>) data bases but essentially by scanning by eye four plates of the UKST/SERC Survey in the region between the Centaurus complex and the Pavo-Indus (PI) wall. The galaxies selected have high central surface brightnesses and are distributed evenly over the whole search area. The majority of the galaxies have apparent magnitudes in the range 11.5<B_J_<17. Redshifts were determined for 211 galaxies with one additional object being found to be Galactic - a planetary nebula. A highly significant density enhancement is found in the galaxy distribution at 5000km/s or 67Mpc (H_0_=75km/s/Mpc). This suggests that a connection exists between the Centaurus complex and the PI wall across the zone of avoidance (ZOA) associated with the Milky Way and as such could be one of the larger structures in the nearby Universe.
3344. Southern Redshifts Catalogue
ID:
ivo://CDS.VizieR/VII/142A
Title:
Southern Redshifts Catalogue
Short Name:
VII/142A
Date:
21 Oct 2021
Publisher:
CDS
Description:
This catalogue provides a "best-estimate" of the heliocentric radial velocities of some 13000 galaxies south of Declination 0 degrees. It is based on over 17000 redshift measurements, from over 200 sources, either published or otherwise made public. Aside from redshift references, each entry includes flags as to whether the velocity is from optical or radio observations, or both, as well as an indication of the nature of any optical emission lines. Galaxies with velocities beyond 75000 km/s are not included. All entries have been made interactively, by one person (A.P.F.). The interaction was necessary because different investigators may use different names, quote slightly different positions, and obtain slightly different velocities for the same galaxy. Thus duplicate entries for the same galaxy are avoided (although a few may inevitably be included).
3345. Southern Sky Redshift Survey
ID:
ivo://CDS.VizieR/J/AJ/116/1
Title:
Southern Sky Redshift Survey
Short Name:
J/AJ/116/1
Date:
21 Oct 2021
Publisher:
CDS
Description:
We report redshifts, magnitudes, and morphological classifications for 5369 galaxies with m_B_<=15.5 and for 57 galaxies fainter than this limit, in two regions covering a total of 1.70 sr in the southern celestial hemisphere. The galaxy catalog is drawn primarily from the list of nonstellar objects identified in the Hubble Space Telescope Guide Star Catalog (GSC). The galaxies have positions accurate to ~1" and magnitudes with an rms scatter of ~0.3mag. We compute magnitudes (m_SSRS2_) from the relation between instrumental GSC magnitudes and the photometry by Lauberts & Valentijn. From a comparison with CCD photometry, we find that our system is homogeneous across the sky and corresponds to magnitudes measured at the isophotal level ~26mag/arcsec^2^. The precision of the radial velocities is ~40km/s, and the redshift survey is more than 99% complete to the m_SSRS2_=15.5mag limit. This sample is in the direction opposite that of the CfA2; in combination the two surveys provide an important database for studies of the properties of galaxies and their large-scale distribution in the nearby universe.
3346. Southern sky survey of 1355 spiral galaxies
ID:
ivo://CDS.VizieR/J/ApJS/81/413
Title:
Southern sky survey of 1355 spiral galaxies
Short Name:
J/ApJS/81/413
Date:
21 Oct 2021
Publisher:
CDS
Description:
The data from photometric and spectroscopic observations of 1355 southern spiral galaxies are presented and used to determine their distances and peculiar velocities via the Tully-Fisher (TF) relation. I-band CCD surface photometry was carried out using the 1-m and 3.9-m telescopes at Siding Spring Observatory. H-alpha rotation curves for 965 galaxies and 551 H I profiles are presented. The physical parameters, photometric and velocity data, distances, and peculiar velocities of the galaxies are presented in tabular form. The mean distance, systemic velocity, and average peculiar velocity of 24 clusters in the sample are given. TF diagrams are presented for each cluster.
3347. Southern spiral galaxies scaleheights
ID:
ivo://CDS.VizieR/J/A+AS/126/503
Title:
Southern spiral galaxies scaleheights
Short Name:
J/A+AS/126/503
Date:
21 Oct 2021
Publisher:
CDS
Description:
Based on Peng's method (1988A&A...206...18P), we obtain scaleheights of 486 southern spiral galaxies, the images of which are taken from the Digitized Sky Survey at Xinglong Station of Beijing Astronomical Observatory. The fitted spiral arms of 70 galaxies are compared with their images to get their optimum inclinations. The scaleheights of other 416 ones are listed in Table 1 in Appendix. After compiling and analyzing the data, we find some statistical correlations. The most interesting results are that a flatter galaxy is bluer and looks brighter, and galaxies become flatter along the Hubble sequence Sab-Scd.
3348. Southern ZOA galaxies 21cm HI-line
ID:
ivo://CDS.VizieR/J/MNRAS/457/2366
Title:
Southern ZOA galaxies 21cm HI-line
Short Name:
J/MNRAS/457/2366
Date:
21 Oct 2021
Publisher:
CDS
Description:
High-accuracy HI profiles and linewidths are presented for inclined ((b/a)^o^<0.5) spiral galaxies in the southern Zone of Avoidance (ZOA). These galaxies define a sample for use in the determinations of peculiar velocities using the near-infrared Tully-Fisher (TF) relation. The sample is based on the 394 HI-selected galaxies from the Parkes HI Zone of Avoidance survey (HIZOA). Follow-up narrow-band Parkes HI observations were obtained in 2010 and 2015 for 290 galaxies, while for the further 104 galaxies, sufficiently high signal-to-noise (S/N) spectra were available from the original HIZOA data. All 394 spectra are reduced and parametrized in the same systematic way. Five different types of linewidth measurements were derived, and a Bayesian mixture model was used to derive conversion equations between these five widths. Of the selected and measure galaxies, 342 have adequate signal to noise (S/N>=5) for use in TF distance estimation. The average value of the S/N ratio of the sample is 14.7. We present the HI parameters for these galaxies. The sample will allow a more accurate determination of the flow field in the southern ZOA which bisects dynamically important large-scale structures such as Puppis, the Great Attractor, and the Local Void.
3349. Space Telescope Imaging Spectrograph
ID:
ivo://archive.stsci.edu/hst/stis
Title:
Space Telescope Imaging Spectrograph
Short Name:
HST.STIS
Date:
23 Jul 2020 19:50:49
Publisher:
Space Telescope Science Institute Archive
Description:
The Space Telescope Imaging Spectrograph (STIS) was installed in HST on Feb. 14, 1997, replacing the GHRS spectrograph. STIS provides spectra and images at ultraviolet and visible wavelengths, probing the Universe from our solar system out to cosmological distances.
3350. Space telescope RM project. III. NGC 5548 LCs
ID:
ivo://CDS.VizieR/J/ApJ/821/56
Title:
Space telescope RM project. III. NGC 5548 LCs
Short Name:
J/ApJ/821/56
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present ground-based optical photometric monitoring data for NGC5548, part of an extended multiwavelength reverberation mapping campaign. The light curves have nearly daily cadence from 2014 January to July in nine filters (BVRI and ugriz). Combined with ultraviolet data from the Hubble Space Telescope and Swift, we confirm significant time delays between the continuum bands as a function of wavelength, extending the wavelength coverage from 1158{AA} to the z band (~9160{AA}). We find that the lags at wavelengths longer than the V band are equal to or greater than the lags of high-ionization-state emission lines (such as HeII{lambda}1640 and {lambda}4686), suggesting that the continuum-emitting source is of a physical size comparable to the inner broad-line region (BLR). The trend of lag with wavelength is broadly consistent with the prediction for continuum reprocessing by an accretion disk with {tau}{propto}{lambda}^4/3^. However, the lags also imply a disk radius that is 3 times larger than the prediction from standard thin-disk theory, assuming that the bolometric luminosity is 10% of the Eddington luminosity (L=0.1L_Edd_). Using optical spectra from the Large Binocular Telescope, we estimate the bias of the interband continuum lags due to BLR emission observed in the filters. We find that the bias for filters with high levels of BLR contamination (~20%) can be important for the shortest continuum lags and likely has a significant impact on the u and U bands owing to Balmer continuum emission.

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