J/MNRAS/497/1791 CCD Washington photometry of Antlia cluster (Calderon+, 2020)
Early-type galaxies in the Antlia Cluster: global properties.
Calderon J.P., Bassino L.P., Cellone S.A., Gomez M., Caso J.P.
<Mon. Not. R. Astron. Soc. 497, 1791-1806 (2020)>
=2020MNRAS.497.1791C 2020MNRAS.497.1791C (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Galaxies, photometry ; Galaxy catalogs ;
Photometry, CCD ; Photometry, CMT1T2V
Keywords: galaxies clusters: general - galaxies: clusters: individual: Antlia -
galaxies: dwarf - galaxies: elliptical and lenticular, cD -
galaxies: fundamental parameters
Abstract:
We present an extension of our previous research on the early-type
galaxy population of the Antlia cluster (d∼35Mpc), achieving a total
coverage of ∼2.6deg2 and performing surface photometry for ∼300
galaxies, 130 of which are new uncatalogued ones. Such new galaxies
mainly fall in the low surface brightness (LSB) regime, but there are
also some lenticulars (S0) which support the existence of unique
functions that connect bright and dwarf galaxies in the scaling
relations. We analyse the projected spatial distribution of galaxies
up to a distance of ∼800kpc from NGC 3268, the adopted centre, as
well as the radial velocity distribution and the correlation between
galaxy colour and effective radius with the projected spatial
distribution. We also obtain the luminosity function of the early-type
galaxies and the distribution of stellar masses using the T1-band
magnitudes and adopted mass-luminosity ratios. Additionally, we
correlate the central galaxy distribution with an X-ray emission map
from the literature. Based on the analysis of the radial velocities
and galaxy colour distributions, we find that galaxies redder than the
colour-magnitude relation (CMR) have a velocity distribution strongly
concentrated towards the values of the dominant galaxies and are
homogeneously distributed throughout the cluster. Those bluer than the
CMR, in turn, have a much more extended radial velocity distribution
and are concentrated towards the centre of the cluster.
We also identify 12 candidates to ultra diffuse galaxies (UDG), that
seem to be split into two families, and speculate about their origins
in the context of the cluster structure.
Description:
We perform a photometric study on four new fields that complements
those carried out in previous surveys on the Antlia cluster of
galaxies. These fields were observed with the MOSAICII camera mounted
on the 4-m Blanco telescope at the Cerro Tololo Inter-American
Observatory (CTIO, Chile), during the nights of February 11 and 12,
2010. The CCD images were acquired selecting the Washington (C) and
Kron-Cousins (R) filters; observations were later transformed into the
genuine Washington C and T1 bands (taking into account the zero-point
offset: R-T1=-0.02). The coverage of MOSAICII images is about
8000x8000 pixels with a scale of 0.27arcsec/pixel, that corresponds
to 36-arcmin x 36-arcmin or, equivalently, to 370x370kpc2,
according to the adopted Antlia distance. The image reduction was
performed using the MSCRED package from RAF, with the standard
procedure already explained in the previous papers
(2018MNRAS.477.1760C 2018MNRAS.477.1760C).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 127 543 Catalogue of galaxies in the Antlia cluster
(table 3 of the paper)
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Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 22 A22 --- Id Identifcation number from Ferguson and Sandage
(1990AJ....100....1F 1990AJ....100....1F, Cat. VII/180,
[FS90] Antlia NNN in Simbad) or new IAU
identification (ANTLJHHMMSS.s+DDMMSS.s)
24- 25 I2 h RAh Right Ascension (J2000)
27- 28 I2 min RAm Right Ascension (J2000)
30- 35 F6.3 s RAs Right Ascension (J2000)
37 A1 --- DE- Declination sign (J2000)
38- 39 I2 deg DEd Declination (J2000)
41- 42 I2 arcmin DEm Declination (J2000)
44- 49 F6.3 arcsec DEs Declination (J2000)
51- 69 A19 --- Morph Morphology classification from Ferguson and
Sandage (1990AJ....100....1F 1990AJ....100....1F, Cat. VII/180)
71 I1 --- Memb [1/3]?=9 Membership status (from Ferguson and
Sandage (1990AJ....100....1F 1990AJ....100....1F, Cat. VII/180)
except those with radial velocity) (1)
73- 77 F5.3 mag ext ?=9.999 Galactic extinction (2)
79- 83 F5.2 mag T1mag ?=99.99 T1-band magnitude
85- 88 F4.2 mag C-T1 ?=9.99 (C-T1) colour index
90- 94 F5.2 mag/arcsec2 mu ?=99.99 T1-band effective surface brightness
96-100 F5.2 kpc re ?=9.99 Effective radius
102-105 F4.2 --- n ?=9.99 Sersic index
107-111 F5.2 Msun Ms ?=99.99 Stellar mass
113-117 I5 km/s RV ?=99 Radial velocity (3)
119-121 I3 km/s e_RV ?=-99 Radial velocity error (3)
123-127 A5 --- Notes Notes, code FSCC* (4)
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Note (1): Membership status as follows:
1 = definite member
2 = likely member
3 = possible member
Note (2): Galactic extinction from Schlafly & Finkbeiner (2011ApJ...737..103S 2011ApJ...737..103S).
Note (3): References of radial velocities: Smith Castelli et al.
(2012MNRAS.419.2472S 2012MNRAS.419.2472S); Caso et al. (2015A&A...584A.125C 2015A&A...584A.125C); Jones et al.
(2009MNRAS.399..683J 2009MNRAS.399..683J, Cat. VII/259) or NED
Note (4): Code FSCC* as follows:
F = Ferguson & Sandage (1990AJ....100....1F 1990AJ....100....1F, Cat. VII/180)
S = Smith Castelli et al. (2008, Cat. J/MNRAS/386/2311) and
Smith Castelli et al. (2012MNRAS.419.2472S 2012MNRAS.419.2472S)
C = Caso & Richtler (2015A&A...584A.125C 2015A&A...584A.125C)
C = Calderon et al. (2015MNRAS.451..791C 2015MNRAS.451..791C) and
Calderon et al. (2018MNRAS.477.1760C 2018MNRAS.477.1760C)
* = identify galaxies studied for the first time in the present paper
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Acknowledgements:
Juan Pablo Calderon, juan.pablo.calderon0(at)gmail.com
References:
Calderon et al. (2015MNRAS.451..791C 2015MNRAS.451..791C)
Early-type galaxies in the Antlia Cluster: a deep look into scaling relations
Calderon et al. (2018MNRAS.477.1760C 2018MNRAS.477.1760C)
Early-type galaxies in the Antlia cluster: catalogue and isophotal analysis
(End) J.P. Calderon [CONICET-IALP-UNLP, Arg], P. Vannier [CDS] 15-Jul-2020