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511. Morphology of galaxies in WINGS clusters
ID:
ivo://CDS.VizieR/J/MNRAS/420/926
Title:
Morphology of galaxies in WINGS clusters
Short Name:
J/MNRAS/420/926
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present the morphological catalog of galaxies in nearby clusters of the WINGS survey (Fasano et al., 2006A&A...445..805F). The catalog contains a total number of 39923 galaxies, for which we provide the automatic estimates of the morphological type applying the purposely devised tool MORPHOT to the V-band WINGS imaging. For ~3000 galaxies we also provide visual estimates of the morphological types. A substantial part of the paper is devoted to the description of the MORPHOT tool, whose application is limited, at least for the moment, to the WINGS imaging only. The approach of the tool to the automation of morphological classification is a non parametric and fully empirical one. In particular, MORPHOT exploits 21 morphological diagnostics, directly and easily computable from the galaxy image, to provide two independent classifications: one based on a Maximum Likelihood (ML), semi-analytical technique, the other one on a Neural Network (NN) machine. A suitably selected sample of ~1000 visually classified WINGS galaxies is used to calibrate the diagnostics for the ML estimator and as a training set in the NN machine. The final morphological estimator combines the two techniques and proves to be effective both when applied to an additional test sample of ~1000 visually classified WINGS galaxies and when compared with small samples of SDSS galaxies visually classified by Fukugita et al. (2007, Cat. J/AJ/134/579) and Nair et al. (2010, Cat. J/ApJS/186/427). Finally, besides the galaxy morphology distribution (corrected for field contamination) in the WINGS clusters, we present the ellipticity, color (B-V) and Sersic index (n) distributions for different morphological types, as well as the morphological fractions as a function of the clustercentric distance (in units of R200).
512. Morphology of SDSS galaxies
ID:
ivo://CDS.VizieR/J/MNRAS/476/3661
Title:
Morphology of SDSS galaxies
Short Name:
J/MNRAS/476/3661
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present a morphological catalogue for ~670000 galaxies in the Sloan Digital Sky Survey in two flavours: T-type, related to the Hubble sequence, and Galaxy Zoo 2 (GZ2 hereafter) classification scheme. By combining accurate existing visual classification catalogues with machine learning, we provide the largest and most accurate morphological catalogue up to date. The classifications are obtained with Deep Learning algorithms using Convolutional Neural Networks (CNNs). We use two visual classification catalogues, GZ2 and Nair & Abraham (2010ApJS..186..427N, Cat. J/ApJS/186/427), for training CNNs with colour images in order to obtain T-types and a series of GZ2 type questions (disc/features, edge-on galaxies, bar signature, bulge prominence, roundness, and mergers). We also provide an additional probability enabling a separation between pure elliptical (E) from S0, where the T-type model is not so efficient. For the T-type, our results show smaller offset and scatter than previous models trained with support vector machines. For the GZ2 type questions, our models have large accuracy (>97 per cent), precision and recall values (>90 per cent), when applied to a test sample with the same characteristics as the one used for training. The catalogue is publicly released with the paper.
513. Morphology of supernova host galaxies
ID:
ivo://CDS.VizieR/J/MNRAS/424/2841
Title:
Morphology of supernova host galaxies
Short Name:
J/MNRAS/424/2841
Date:
21 Oct 2021
Publisher:
CDS
Description:
This paper presents an analysis of core-collapse supernova distributions in isolated and interacting host galaxies, paying close attention to the selection effects involved in conducting host galaxy supernova studies. When taking into account all of the selection effects within our host galaxy sample, we draw the following conclusions. 1. Within interacting, or 'disturbed', systems there is a real, and statistically significant, increase in the fraction of stripped-envelope supernovae in the central regions. A discussion into what may cause this increased fraction, compared to the more common Type IIP supernovae and Type II supernovae without subclassifications, is presented. Selection effects are shown not to drive this result, and so we propose that this study provides direct evidence for a high-mass weighted initial mass function within the central regions of disturbed galaxies. 2. Within 'undisturbed' spiral galaxies the radial distribution of Type Ib and Type Ic supernovae is statistically very different, with the latter showing a more centrally concentrated distribution. This could be driven by metallicity gradients in these undisturbed galaxies, or radial variations in other properties (binarity or stellar rotation) driving envelope loss in progenitor stars. This result is not found in 'disturbed' systems, where the distributions of Type Ib and Ic supernovae are consistent.
514. M 31 reference catalog
ID:
ivo://CDS.VizieR/J/PAZh/24/93
Title:
M 31 reference catalog
Short Name:
J/PAZh/24/93
Date:
21 Oct 2021
Publisher:
CDS
Description:
We compiled a catalog of 421 references 12-15mag stars for determining accurate positions of objects in the region of M 31. We also compiled a star chart, which is provided as an Internet Web service, for identifying the catalogued reference stars on the plates of observers. AQccurate positions and a finding chart are given for 33 reference 15-17mag stars in a 10'x12' field near the center of M 31.
515. MUDEHAR DR1 Catalogue (March, 2025)
ID:
ivo://CEFCA/mudehar/MUDEHAR-DR1
Title:
MUDEHAR DR1 Catalogue (March, 2025)
Short Name:
MUDEHAR-DR1
Date:
12 Mar 2025 09:30:00
Publisher:
Centro de Estudios de Física del Cosmos de Aragón (CEFCA)
Description:
MUDEHaR DR1 (March, 2025). MUDEHaR (MUlti-epoch Disparity Examination of H-Alpha and infraRed) is a multi-epoch photometric survey of two narrow filters: Hα and the calcium triplet window. Using the JAST telescope and T80Cam instrument at the Observatorio Astrofísico de Javalambre (OAJ, Teruel, Spain) is studying 40 square degrees of star forming fields in the Galactic disk. It will detect all kind of variable Hα stars on a days-months-years scale. . Please include the following in any published material that makes use of this data: "Based on observations made with the JAST80 telescope for the MUDEHaR project at the Observatorio Astrofísico de Javalambre, in Teruel, owned, managed and operated by the Centro de Estudios de Física del Cosmos de Aragón."
516. Multi-color photometry of star-forming galaxies
ID:
ivo://CDS.VizieR/J/A+A/556/A55
Title:
Multi-color photometry of star-forming galaxies
Short Name:
J/A+A/556/A55
Date:
21 Oct 2021
Publisher:
CDS
Description:
We estimate the galaxy stellar mass function and stellar mass density for star-forming and quiescent galaxies with 0.2<z<4. We construct a large, deep sample of galaxies selected using the new UltraVISTA DR1 data release (Cat. J/A+A/544/A156). Our analysis is based on precise 30-band photometric redshifts. By comparing these photometric redshifts with 10800 spectroscopic redshifts from the zCOSMOS bright (Cat. J/ApJS/172/70) and faint (Lilly et al. in prep) surveys, we find an accuracy of sigma(dz/(1+z))=0.008 at i<22.5 and sigma(dz/(1+z))=0.03 at 1.5<z<4.
517. Multifrequency catalog of LINERs
ID:
ivo://CDS.VizieR/J/other/RMxAA/35.187
Title:
Multifrequency catalog of LINERs
Short Name:
J/other/RMxAA/35
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present the first Catalog of Low Ionization Emission Line Galaxies (LINERs or Liners, which is the simplest name, and which we shall adopt in what follows). The Catalog "MCL" (Multifrequency Catalog of Liners), contains 476 entries and contains both broad-band and monochromatic emission data (ranging from radio to X-ray frequencies) of colors, and other data compiled from the literature and various data bases, as indicated in the references. Most of the galaxies can be considered "pure" Liners on the basis of the Veilleux & Osterbrock (1987ApJS...63..295V) classification as suggested by Ho, Filippenko, & Sargent (1997ApJS..112..315H). However, a considerable number of transition (Liners-H II or Liners-Starburst) objects are also included. One of the open questions, is whether Liners should be considered as a class of galaxies (like Seyfert galaxies for instance) or rather, as an heterogeneous group of objects. We believe the study of Liners as a group is very interesting, precisely because they very likely represent a transition between non-thermal and starburst activity, and probably also between "active" and "non- active" galaxies. This catalog may be used as a basis for statistical research. A preliminary discussion of the main statistical properties of Liners, in the range from radio to X-ray frequencies, is given here.
518. Multifrequency catalogue of blazars, Roma-BZCAT
ID:
ivo://CDS.VizieR/J/A+A/495/691
Title:
Multifrequency catalogue of blazars, Roma-BZCAT
Short Name:
J/A+A/495/691
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present a new catalogue of blazars based on multifrequency surveys and on an extensive review of the literature. Blazars are classified as BL Lacertae objects, as flat spectrum radio quasars or as blazars of uncertain/transitional type. Each object is identified by a root name, coded as BZB, BZQ and BZU for these three subclasses respectively, and by its coordinates. This catalogue is being built as a tool useful for the identification of the extragalactic sources that will be detected by present and future experiments for X and gamma-ray astronomy, like Swift, AGILE, Fermi-GLAST and Simbol-X. An electronic version is available from the ASI Science Data Center web site at http://www.asdc.asi.it/bzcat.
519. Multi-frequency celestial reference frame
ID:
ivo://CDS.VizieR/J/A+A/630/A101
Title:
Multi-frequency celestial reference frame
Short Name:
J/A+A/630/A101
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present a celestial reference frame (CRF) based on the combination of independent, multifrequency radio source position catalogs using nearly 40 years of very long baseline interferometry observations at the standard geodetic frequencies at SX band and about 15 years of observations at higher frequencies (K and XKa). The final catalog contains 4617 sources. We produce a multifrequency catalog of radio source positions with full variance-covariance information across all radio source positions of all input catalogs. We combined three catalogs, one observed at 8GHz (X band), one at 24GHz (K band) and one at 32GHz (Ka band). Rather than only using the radio source positions, we developed a new, rigorous combination approach by carrying over the full covariance information through the process of adding normal equation systems. Special validation routines were used to characterize the random and systematic errors between the input reference frames and the combined catalog. The resulting CRF contains precise positions of 4617 compact radio astronomical objects, 4536 measured at 8GHz, 824 sources also observed at 24GHz, and 674 at 32GHz. The frame is aligned with ICRF3 within +/-3{mu}as and shows an average positional uncertainty of 0.1mas in right ascension and declination. No significant deformations can be identified. Comparisons with Gaia-CRF remain inconclusive, nonetheless significant differences between all frames can be attested.
520. Multi-frequency galaxy group catalogue
ID:
ivo://CDS.VizieR/J/A+A/590/A29
Title:
Multi-frequency galaxy group catalogue
Short Name:
J/A+A/590/A29
Date:
21 Oct 2021
Publisher:
CDS
Description:
To understand the role of the environment in galaxy formation, evolution, and present-day properties, it is essential to study the multi-frequency behavior of different galaxy populations under various environmental conditions. We study the stellar mass functions of different galaxy populations in groups as a function of their large scale environments using multi-frequency observations. We crossmatch the SDSS DR10 group catalogue with GAMA Data Release 2 and Wide-field Survey Explorer (WISE) data to construct a catalogue of 1651 groups and 11436 galaxies containing photometric information in 15 different wavebands ranging from ultraviolet (0.152-micron) to mid-infrared (22-micron). We perform the spectral energy distribution (SED) fitting of galaxies using the MAGPHYS code and estimate the rest frame luminosities and stellar masses. We use the 1/Vmax method to estimate the galaxy stellar mass and luminosity functions, and the luminosity density field of galaxies to define the large scale environment of galaxies. The stellar mass functions of both central and satellite galaxies in groups are different in low and high density large scale environments. Satellite galaxies in high density environments have a steeper low mass end slope compared to low density environments, independently of the galaxy morphology. Central galaxies in low density environments have a steeper low mass end slope but the difference disappears for fixed galaxy morphology. The characteristic stellar mass of satellite galaxies is higher in high density environments and the difference exists only for galaxies with elliptical morphologies. Galaxy formation in groups is more efficient in high density large scale environments. Groups in high density environments have higher abundances of satellite galaxies, irrespective of the satellite galaxy morphology. The elliptical satellite galaxies are generally more massive in high density environments. The stellar masses of spiral satellite galaxies show no dependence on the large scale environment.

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