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2411. Nearby early-type galaxies catalog
ID:
ivo://CDS.VizieR/J/MNRAS/460/4492
Title:
Nearby early-type galaxies catalog
Short Name:
J/MNRAS/460/4492
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present a catalogue of 1715 early-type galaxies from the literature, spanning the luminosity range from faint dwarf spheroidal galaxies to giant elliptical galaxies. The aim of this catalogue is to be one of the most comprehensive and publicly available collections of data on early-type galaxies. The emphasis in this catalogue lies on dwarf elliptical galaxies, for which some samples with detailed data have been published recently. For almost all of the early-type galaxies included in it, this catalogue contains data on their locations, distances, redshifts, half-light radii, the masses of their stellar populations and apparent magnitudes in various passbands. Data on metallicity and various colours are available for a majority of the galaxies presented here. The data on magnitudes, colours, metallicities and masses of the stellar populations is supplemented with entries that are based on fits to data from simple stellar population models and existing data from observations. Also, some simple transformations have been applied to the data on magnitudes, colours and metallicities in this catalog, in order to increase the homogeneity of this data. Estimates on the Sersic profiles, internal velocity dispersions, maximum rotational velocities, dynamical masses and ages are listed for several hundreds of the galaxies in this catalogue. Finally, each quantity listed in this catalogue is accompanied with information on its source, so that users of this catalogue can easily exclude data that they do not consider as reliable enough for their purposes.
2412. Nearby early-type galaxies in Stripe 82
ID:
ivo://CDS.VizieR/J/other/RAA/11.309
Title:
Nearby early-type galaxies in Stripe 82
Short Name:
J/other/RAA/11.3
Date:
21 Oct 2021
Publisher:
CDS
Description:
We make use of the images from the Sloan Digital Sky Survey Stripe 82 (Stripe 82) to present an analysis of r band surface brightness profiles and radial color gradients (g-r, u-r) in our sample of 111 nearby early-type galaxies (ETGs). Thanks to the Stripe 82 images, each of which is co-added from about 50 single frames, we are able to pay special attention to the low-surface-brightness areas (LSB areas) of the galaxies.
2413. Nearby early-type galaxies with ionized gas. I.
ID:
ivo://CDS.VizieR/J/A+A/433/497
Title:
Nearby early-type galaxies with ionized gas. I.
Short Name:
J/A+A/433/497
Date:
21 Oct 2021
Publisher:
CDS
Description:
With the aim of building a data-set of spectral properties of well studied early-type galaxies showing emission lines, we present intermediate resolution spectra of 50 galaxies in the nearby Universe. The sample, which covers several of the E and S0 morphological sub-classes, is biased toward objects that might be expected to have ongoing and recent star formation, at least in small amounts, because of the presence of the emission lines. The emission is expected to come from the combination of active galactic nuclei and star formation regions within the galaxies. Sample galaxies are located in environments corresponding to a broad range of local galaxy densities, although predominantly in low density environments. Our long-slit spectra cover the 3700-7250{AA} wavelength range with a spectral resolution of approximately 7.6{AA} at 5550{AA}. The specific aim of this paper, and our first step in the investigation, is to map the underlying galaxy stellar population by measuring, along the slit positioned along the galaxy major axis, line-strength indices at several, homogeneous galacto-centric distances. For each object we extracted 7 luminosity-weighted apertures (with radii 1.5", 2.5", 10", r_e/10_, r_e/8_, r_e/4_ and r_e/2_) corrected for the galaxy ellipticity and 4 gradients (0<r<r_e/16_, r_e/16_<r<r_e/8_, r_e/8_<r<r_e/4_ and r_e/4_<r<r_e/2_). For each aperture and gradient we measured 25 line-strength indices: 21 of the set defined by the Lick-IDS ``standard'' system (Trager et al., 1998, Cat. J/ApJS/116/1) and 4 introduced by Worthey & Ottaviani (1997, Cat. J/ApJS/111/377). Line-strength indices have been transformed to the Lick-IDS system. Indices derived then include H{beta}, Mg_1_, Mg_2_, Mgb, MgFe, Fe5270, Fe5335 commonly used in classic index-index diagrams. The paper introduces the sample, presents the observations, describes the data reduction procedures, the extraction of apertures and gradients, the determination and correction of the line-strength indices, the procedure adopted to transform them into the Lick-IDS System and the procedures adopted for the emission correction. We finally discuss the comparisons between our dataset and line-strength indices available in the literature. A significant fraction, about 60%, of galaxies in the present sample has one previous measurement in the Lick-IDS system but basically restricted within the r_e/8_ region. Line-strength measures obtained both from apertures and gradients outside this area and within the r_e/8_ region, with the present radial mapping, are completely new.
2414. Nearby early-type gal. with ionized gas. II.
ID:
ivo://CDS.VizieR/J/A+A/445/79
Title:
Nearby early-type gal. with ionized gas. II.
Short Name:
J/A+A/445/79
Date:
21 Oct 2021
Publisher:
CDS
Description:
Rampazzo et al., 2005, Cat. <J/A+A/433/497> (Paper I) presented a data-set of line-strength indices for 50 early-type galaxies in the nearby Universe. The galaxy sample is biased toward galaxies showing emission lines, located in environments corresponding to a broad range of local galaxy densities, although predominantly in low density environments. The present addendum enlarges the above data-set of line-strength indices by analyzing 18 additional early-type galaxies (three galaxies, NGC 3607, NGC 5077 and NGC 5898 were presented in the previous set). We measured 25 line-strength indices, defined by the Lick IDS "standard" system (Trager et al., 1998, Cat. <J/ApJS/116/1>; Worthey & Ottaviani, 1997, Cat. <J/ApJS/111/377>), for 7 luminosity weighted apertures and 4 gradients of each galaxy. This addendum presents the line-strength data-set and compares it with the available data in the literature.
2415. Nearby early-type gal. with ionized gas. III.
ID:
ivo://CDS.VizieR/J/A+A/463/455
Title:
Nearby early-type gal. with ionized gas. III.
Short Name:
J/A+A/463/455
Date:
21 Oct 2021
Publisher:
CDS
Description:
The paper is devoted to the study of the underlying stellar population of a sample of 62 nearby early-type galaxies, predominantly located in low density environments, a large fraction of which showing emission lines. Ages, metallicities and [{alpha}/Fe] ratios have been derived through the comparison of Lick indices measured at different galacto-centric distances (7 apertures and 4 gradients) with new Simple Stellar Population (SSP) models which account for the presence of alpha/Fe-enhancement. The SSPs cover a wide range of ages (10^8^-16x10^9^yr), metallicities (0.0004<=Z<=0.05) and [{alpha}/Fe] ratios (0-0.8). To derive the stellar population parameters we use an algorithm that provides, together with the most likely solution in the (age, Z, [{alpha}/Fe]) space, also the probability density function along the age-metallicity degeneracy. We derive a large spread in age, with SSP-equivalent ages ranging from a few to 15Gyrs. Age does not show any significant trend with central velocity dispersion sigma_c_ but E galaxies appear on average older than lenticulars.
2416. Nearby Galaxies
ID:
ivo://CDS.VizieR/VII/161
Title:
Nearby Galaxies
Short Name:
VII/161
Date:
21 Oct 2021
Publisher:
CDS
Description:
The sample contains the galaxies with a velocity less than 500km/s with respect to the centroid of the Local Group. The inclusion of a galaxy into the catalog depends on its redshift as in the catalogue of Kraan-Korteweg and Tammann (1979) or on the fact that the objects are known to be certain or probable member of nearby groups. The galaxies in this catalogue form the Local Group, but one third of the galaxies does not seem to belong to any group. For a detailed explanation of the astrophysical meaning of the columns, please refer in any case to the explanation given in Schmidt and Boller (1992). Concerning the references, the basic list of references is given in Schmidt & Boller (1992). The dust masses of six dwarf irregular galaxies (LGS3, U3974, A0818+71, U8091, D210, U12613) are taken from Young et al. (1989). Additional data for several galaxies, especially on the apparent magnitudes as well as on the profile width of the 21 cm line at the level 50 per cent of the maximum value, are taken from a recent preprint by Karachentsev (1993).
2417. Nearby galaxies abundances
ID:
ivo://CDS.VizieR/J/MNRAS/471/1743
Title:
Nearby galaxies abundances
Short Name:
J/MNRAS/471/1743
Date:
21 Oct 2021
Publisher:
CDS
Description:
We combine samples of nearby galaxies with Herschel photometry selected on their dust, metal, HI and stellar mass content, and compare these to chemical evolution models in order to discriminate between different dust sources. In a companion paper, we used an HI-selected sample of nearby galaxies to reveal a subsample of very gas-rich (gas fraction >80 per cent) sources with dust masses significantly below predictions from simple chemical evolution models, and well below M_d_/M_*_ and M_d_/M_gas_ scaling relations seen in dust and stellar-selected samples of local galaxies. We use a chemical evolution model to explain these dust-poor, but gas-rich, sources as well as the observed star formation rates (SFRs) and dust-to-gas ratios. We find that (i) a delayed star formation history is required to model the observed SFRs; (ii) inflows and outflows are required to model the observed metallicities at low gas fractions; (iii) a reduced contribution of dust from supernovae (SNe) is needed to explain the dust-poor sources with high gas fractions. These dust-poor, low stellar mass galaxies require a typical core-collapse SN to produce 0.01-0.16M_{sun}_ of dust. To match the observed dust masses at lower gas fractions, significant grain growth is required to counteract the reduced contribution from dust in SNe and dust destruction from SN shocks. These findings are statistically robust, though due to intrinsic scatter it is not always possible to find one single model that successfully describes all the data. We also show that the dust-to-metal ratio decreases towards lower metallicity.
2418. Nearby Galaxies Catalogue (NBG)
ID:
ivo://CDS.VizieR/VII/145
Title:
Nearby Galaxies Catalogue (NBG)
Short Name:
VII/145
Date:
21 Oct 2021
Publisher:
CDS
Description:
(no description available)
2419. Nearby galaxies HI observations
ID:
ivo://CDS.VizieR/J/AJ/127/3273
Title:
Nearby galaxies HI observations
Short Name:
J/AJ/127/3273
Date:
21 Oct 2021
Publisher:
CDS
Description:
A survey of 329 nearby galaxies (redshift z<0.045) has been conducted to study the distribution of mass and light within spiral galaxies over a range of environments. The 18 observed clusters and groups span a range of richness, density, and X-ray temperature and are supplemented by a set of 30 isolated field galaxies. Optical spectroscopy taken with the 200inch (5m) Hale Telescope provides separately resolved H{alpha} and [NII] major-axis rotation curves for the complete set of galaxies, which are analyzed to yield velocity widths and profile shapes, extents, and gradients. HI line profiles provide an independent velocity width measurement and a measure of HI gas mass and distribution. I-band images are used to deconvolve profiles into disk and bulge components, to determine global luminosities and ellipticities, and to check morphological classification. These data are combined to form a unified data set ideal for the study of the effects of environment upon galaxy evolution.
2420. 875 nearby galaxies multiwavelength photometry
ID:
ivo://CDS.VizieR/J/A+A/609/A37
Title:
875 nearby galaxies multiwavelength photometry
Short Name:
J/A+A/609/A37
Date:
21 Oct 2021
Publisher:
CDS
Description:
The DustPedia project is capitalising on the legacy of the Herschel Space Observatory, using cutting-edge modelling techniques to study dust in the 875 DustPedia galaxies - representing the vast majority of extended galaxies within 3000km/s that were observed by Herschel. This work requires a database of multiwavelength imagery and photometry that greatly exceeds the scope (in terms of wavelength coverage and number of galaxies) of any previous local-Universe survey. We constructed a database containing our own custom Herschel reductions, along with standardised archival observations from GALEX, SDSS, DSS, 2MASS, WISE, Spitzer, and Planck. Using these data, we performed consistent aperture-matched photometry, which we combined with external supplementary photometry from IRAS and Planck. We present our multiwavelength photometry across 40 UV-microwave bands for the 875 DustPedia galaxies. Our aperture-matched photometry, combined with the external supplementary photometry, represents a total of 21,857 photometric measurements. A typical DustPedia galaxy has multiwavelength photometry spanning 25 bands. To carry out our photometry we developed the Comprehensive & Adaptable Aperture Photometry Routine (CAAPR). CAAPR is designed to produce consistent photometry for the enormous range of galaxy and observation types in our data. In particular, CAAPR is able to determine robust cross-compatible uncertainties, thanks to a novel method for reliably extrapolating the aperture noise for observations that cover a very limited amount of background.