- ID:
- ivo://CDS.VizieR/J/A+A/459/679
- Title:
- RB photometry of LSBG in Coma
- Short Name:
- J/A+A/459/679
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We report on a search for faint (R total magnitude fainter than 21) and low surface brightness galaxies (R central surface brightness fainter than ~24) (fLSBs) in a 0.72x0.82deg^2^ area centered on the Coma cluster. We analyzed deep B and R band CCD imaging obtained using the CFH12K camera at CFHT and found 735 fLSBs. The total B magnitudes, at the Coma cluster redshift, range from -13 to -9 with B central surface brightness as faint as 27mag/arcsec^2^.
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2982. RC2 Catalogue
- ID:
- ivo://CDS.VizieR/VII/112
- Title:
- RC2 Catalogue
- Short Name:
- VII/112
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This standardized documentation file does not contain a complete description of the electronic version of the RC2 catalogue; please refer to the "doc.tex" file prepared by Theresa A. Nagy and Robert S. Hill.
- ID:
- ivo://CDS.VizieR/J/AJ/108/2128
- Title:
- RC3 corrections and additions
- Short Name:
- J/AJ/108/2128
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Lists of corrections and additions to the Third Reference Catalogue of Bright Galaxies (RC3, Cat. <VII/155>) are given. The corrected version of the catalogue (RC3.9b), dated April 1994, is currently available through the national data centers.
- ID:
- ivo://CDS.VizieR/J/AJ/125/2307
- Title:
- Rc photometry of ENEAR survey galaxies
- Short Name:
- J/AJ/125/2307
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present R-band CCD photometry for 1332 early-type galaxies, observed as part of the Early-type NEARby galaxies (ENEAR) survey of peculiar motions using early-type galaxies in the nearby universe. Circular apertures are used to trace the surface brightness profiles, which are then fitted by a two-component bulge-disk model. From the fits, we obtain the structural parameters required to estimate galaxy distances using the Dn-{sigma} and fundamental plane relations. The photometric data reported here represent one of the largest high-quality and uniform all-sky samples currently available for early-type galaxies in the nearby universe, especially suitable for peculiar motion studies.
- ID:
- ivo://CDS.VizieR/J/AJ/135/1488
- Title:
- Rc photometry of galaxies in NGC 5353/4 group
- Short Name:
- J/AJ/135/1488
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This third paper in a series about the dwarf galaxy populations in groups within the Local Supercluster concerns the intermediate mass (2.1x10^13^M_{sun}_) NGC 5353/4 Group with a core dominated by S0 systems and a periphery of mostly spiral systems. Dwarf galaxies are strongly concentrated toward the core. The mass-to-light ratio M/L_R_=105M_{sun}_/L_{sun}_ is a factor of 3 lower than for the two groups studied earlier in the series. The properties of the group suggest it is much less dynamically evolved than those two groups of early-type galaxies. By comparison, the NGC 5353/4 Group lacks superluminous systems but has a large fraction of intermediate-luminosity galaxies; or equivalently, a luminosity function with a flatter faint-end slope. The luminosity function for the NGC 5353/4 Group should steepen as the intermediate-luminosity galaxies merge. Evidence for the ongoing collapse of the group is provided by the unusually large incidence of star-formation activity in small galaxies with early morphological types. The pattern in the distribution of galaxies with activity suggests a succession of infall events. Residual gas in dwarfs that enter the group is used up in sputtering events. The resolution of midlife crises is exhaustion.
- ID:
- ivo://CDS.VizieR/J/MNRAS/442/533
- Title:
- Recently quenched elliptical galaxies in SDSS
- Short Name:
- J/MNRAS/442/533
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We use the Sloan Digital Sky Survey to investigate the properties of massive elliptical galaxies in the local Universe (z<=0.08) that have unusually blue optical colours. Through careful inspection, we distinguish elliptical from non-elliptical morphologies among a large sample of similarly blue galaxies with high central light concentrations (c_r_>=2.6). These blue ellipticals comprise 3.7 per cent of all c_r>=2.6 galaxies with stellar masses between 10^10^ and 10^11^h^-2^M_{sun}_. Using published fibre spectrum diagnostics, we identify a unique subset of 172 non-star-forming ellipticals with distinctly blue urz colours and young (<3Gyr) light-weighted stellar ages. These recently quenched ellipticals (RQEs) have a number density of 2.7-4.7x10^-5^h^3^/Mpc^3^ and sufficient numbers above 2.5x10^10^h^-2^M_{sun}_ to account for more than half of the expected quiescent growth at late cosmic time assuming that this phase lasts 0.5Gyr. RQEs have properties that are consistent with a recent merger origin (i.e. they are strong 'first-generation' elliptical candidates), yet few involved a starburst strong enough to produce an E+A signature. The preferred environment of RQEs (90 per cent reside at the centres of <3x10^12^h^-1^M_{sun}_ groups) agrees well with the 'small group scale' predicted for maximally efficient spiral merging on to their halo centre and rules out satellite-specific quenching processes. The high incidence of Seyfert and LINER activity in RQEs and their plausible descendants may heat the atmospheres of small host haloes sufficiently to maintain quenching.
- ID:
- ivo://CDS.VizieR/J/MNRAS/338/525
- Title:
- Recent star formation in UCM galaxies
- Short Name:
- J/MNRAS/338/525
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the integrated properties of the stellar populations in the Universidad Complutense de Madrid (UCM) Survey galaxies. Applying the techniques described in the first paper of this series (Perez-Gonzalez et al., 2003, Cat. <J/MNRAS/338/508>), we derive ages, burst masses and metallicities of the newly formed stars in our sample galaxies.
- ID:
- ivo://CDS.VizieR/J/MNRAS/456/3899
- Title:
- Red galaxies with pseudo-bulges in the SDSS
- Short Name:
- J/MNRAS/456/3899
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Pseudo-bulges are expected to markedly differ from classical quasi-monolithically forming bulges in their star formation history (SFH) and chemical abundance patterns. To test this simple expectation, we carry out a comparative structural and spectral synthesis analysis of 10^6^ red massive galaxies issued from the Sloan Digital Sky Survey (SDSS), sub-divided into bulgeless, pseudo-bulge and classical bulge galaxies according to their photometric characteristics, and further obeying a specific selection to minimize uncertainties in the analysis and ensure an unbiased derivation and comparison of SFHs. Our 2D photometry analysis suggests that discs underlying pseudo-bulges typically have larger exponential scalelengths than bulgeless galaxies, despite similar integral disc luminosities. Spectral synthesis models of the stellar emission within the 3-arcsec SDSS fibre aperture reveal a clear segregation of bulgeless and pseudo-bulge galaxies from classical bulges on the luminosity-weighted planes of age-metallicity and mass-metallicity, though a large dispersion is observed within the two former classes. The secular growth of pseudo-bulges is also reflected upon their cumulative stellar mass as a function of time, which is shallower than that for classical bulges. Such results suggest that the centres of bulgeless and pseudo-bulge galaxies substantially differ from those of bulgy galaxies with respect to their SFH and chemical enrichment history, which likely points to different formation/assembly mechanisms.
- ID:
- ivo://CDS.VizieR/J/A+A/558/A68
- Title:
- Red nuclear spectra of 376 local galaxies
- Short Name:
- J/A+A/558/A68
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We obtained long-slit optical spectra of the nuclear regions of 376 galaxies in the local Universe using the 1.5m Cassini telescope of Bologna Observatory. Of these spectra, 164 were either never taken before by the Sloan Digital Sky Survey (SDSS), or given by the Nasa Extragalactic Database (NED). With these new spectra, we contribute investigating the occurrence of active galactic nuclei (AGNs). Nevertheless, we stress that the present sample is by no means complete, thus, it cannot be used to perform any demographic study. Following the method used in a previous work, we classify the nuclear spectra using a six bin scheme: SEY (Seyfert), sAGN (strong AGN), and wAGN (weak AGN) represent active galactic nuclei of different levels of activity; HII accounts for star-forming nuclei; RET (retired) and PAS (passive) refer to nuclei with poor or no star-formation activity. The spectral classification is performed using the ratio of 6584[NII] to H{alpha} lines and the equivalent width (EW) of H{alpha} versus [NII]/H{alpha} (WHAN diagnostic introduced by Cid Fernandes and collaborators) after correcting H{alpha} for underlying absorption.
- ID:
- ivo://CDS.VizieR/J/A+A/617/A53
- Title:
- Red-sequence early-type galaxies. II.
- Short Name:
- J/A+A/617/A53
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This work aims to observationally investigate the history of size growth of early-type galaxies and how the growth depends on cosmic epoch and the mass of the halo in which they are embedded. We carried out a photometric and structural analysis in the rest-frame V band of a mass-selected (logM/M_{sun}_>10.7) sample of red-sequence early-type galaxies with spectroscopic/grism redshift in the general field up to z=2 to complement a previous work presenting an identical analysis but in halos 100 times more massive and 1000 times denser. We homogeneously derived sizes (effective radii) fully accounting for the multi-component nature of galaxies and the common presence of isophote twists and ellipticity gradients. By using these mass-selected samples, composed of 170 red-sequence early-type galaxies in the general field and 224 identically selected and analyzed in clusters, we isolate the effect on galaxy sizes of the halo in which galaxies are embedded and its dependence on epoch. We find that the log of the galaxy size at a fixed stellar mass, log M/M_{sun}_=11, has increased with epoch at a rate twice as fast in the field than in cluster in the last 10Gyr (0.26+/-0.03 versus 0.13+/-0.02dex per unit redshift). Red-sequence early-type galaxies in the general field reached the size of their cousins in denser environment by z=0.25+/-0.13 in spite of being three times smaller at z~2. Data point toward a model where size growth is epoch-independent (i.e., {\partial}logre/{\partial}z=c), but with a rate c depending on environment, {\partial}c/{\partial}logM_halo_~=0.05. Environment determines the growth rate (dlogre/dz) at all redshifts, indicating an external origin for the galaxy growth without any clear epoch where it ceases to have an effect. The larger size of early-type galaxies in massive halos at high redshift indicates that their size grew buildup earlier (at z>2) at an accelerated rate, slowing down at some still unidentified z>2 redshift. Instead, the size growth rate of red-sequence early-type galaxies in low-mass halos is reversed: it proceeds at an increased rate at late epochs after an early period (z>2) of reduced growth, in agreement with the qualitative hierarchical picture of galaxy evolution. We found similar values of scatter around the mass-size relation independently of environment and epoch, indicating that the amount of dissipation in the system forming the observed galaxy does not vary greatly with epoch or environment.
