2020A&A...640A..38R


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.26CET14:07:43

2020A&A...640A..38R - Astronomy and Astrophysics, volume 640A, 38-38 (2020/8-1)

Morphology and surface photometry of a sample of isolated early-type galaxies from deep imaging.

RAMPAZZO R., OMIZZOLO A., USLENGHI M., ROMAN J., MAZZEI P., VERDES-MONTENEGRO L., MARINO A. and JONES M.G.

Abstract (from CDS):


Context. Isolated early-type galaxies are evolving in unusually poor environments for this morphological family, which is typical of cluster inhabitants. We investigate the mechanisms driving the evolution of these galaxies.
Aims. Several studies indicate that interactions, accretions, and merging episodes leave their signature on the galaxy structure, from the nucleus down to the faint outskirts. We focus on revealing such signatures, if any, in a sample of isolated early-type galaxies, and we quantitatively revise their galaxy classification.
Methods. We observed 20 (out of 104) isolated early-type galaxies, selected from the AMIGA catalog, with the 4KCCD camera at the Vatican Advanced Technology Telescope in the Sloan Digital Sky Survey g and r bands. These are the deepest observations of a sample of isolated early-type galaxies so far: on average, the light profiles reach µg≃28.11±0.70mag/arcsec2 and µr≃27.36±0.68mag/arcsec2. The analysis was performed using the AIDA package, providing point spread function-corrected 2D surface photometry up to the galaxy outskirts. The package provides a model of the 2D galaxy light distribution, which after model subtraction enhances the fine and peculiar structures in the residual image of the galaxies.
Results. Our re-classification suggests that the sample is composed of bona fide early-type galaxies spanning from ellipticals to late-S0s galaxies. Most of the surface brightness profiles are best fitted with a bulge plus disc model, suggesting the presence of an underlying disc structure. The residuals obtained after the model subtraction show the nearly ubiquitous presence of fine structures, such as shells, stellar fans, rings, and tails. Shell systems are revealed in about 60% of these galaxies.
Conclusions. Because interaction, accretion, and merging events are widely interpreted as the origin of the fans, ripples, shells and tails in galaxies, we suggest that most of these isolated early-type galaxies have experienced such events. Because they are isolated (after 2-3Gyr), these galaxies are the cleanest environment in which to study phenomena connected with events like these.

Abstract Copyright: © ESO 2020

Journal keyword(s): galaxies: elliptical and lenticular, cD - galaxies: photometry - galaxies: interaction - galaxies: evolution

VizieR on-line data: <Available at CDS (J/A+A/640/A38): list.dat fits/*>

Simbad objects: 33

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Number of rows : 33

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NGC 620 G 01 36 59.6862477853 +42 19 23.676430837   13.9       ~ 22 0
2 NGC 644 GiG 01 38 52.975 -42 35 07.19   14.79       ~ 30 0
3 NGC 733 G 01 56 24.7370470911 +33 03 52.091021832           ~ 3 0
4 NGC 1533 GiG 04 09 51.8352578260 -56 07 06.404418566   11.77 10.92 10.27 11.0 ~ 178 0
5 MCG+05-20-029 AGN 08 36 01.5123969816 +30 15 59.071350240   15.10       ~ 27 0
6 IC 569 LIN 09 51 28.1475440196 +10 55 12.256517435   15.10       ~ 28 0
7 2MASX J10244646+4627222 G 10 24 46.4494162919 +46 27 21.796710472   15.70       ~ 23 0
8 IC 2577 EmG 10 28 01.425 +32 45 49.86   15.30       ~ 28 0
9 NAME Great Attractor SCG 10 32 -46.0           ~ 472 0
10 NGC 3682 GiG 11 27 41.1923524768 +66 35 23.377078551   13.40       ~ 79 0
11 MCG+01-30-002 G 11 36 39.5738862541 +06 17 30.871719601   14.80       ~ 30 0
12 2MASX J12025206+2615102 GiC 12 02 52.1096051093 +26 15 10.047678035   15.50       ~ 27 0
13 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5909 0
14 NAME SHAPLEY-CENTAURUS CL SCG 13 06.0 -33 04           ~ 511 0
15 IC 862 GiC 13 16 15.3855333255 +20 02 51.625169142   15.20       ~ 28 0
16 UGC 8649 LIN 13 39 11.613 +61 30 22.22   15.20       ~ 27 0
17 MCG+06-30-089 G 13 48 34.6647038980 +37 06 47.927629793   14.90       ~ 31 0
18 2MASX J14134915+3716081 EmG 14 13 49.194 +37 16 08.81   15.30       ~ 42 0
19 MCG+10-21-008 LIN 14 33 31.465 +57 42 42.31   15.70       ~ 26 0
20 NGC 5687 G 14 34 52.4027522441 +54 28 33.106519263   13.30       ~ 94 0
21 HD 238370 PM* 14 34 54.4212662681 +54 26 33.798205083   10.69 9.98     G5 5 0
22 MCG+07-30-054 Sy2 14 43 54.6712024095 +43 34 50.124714720   15.40       ~ 26 0
23 2MASX J15193013+6730165 G 15 19 30.139 +67 30 16.59   15.10       ~ 21 0
24 2MASX J15301518+5649556 LIN 15 30 15.2074650916 +56 49 56.010045352   15.70       ~ 19 0
25 2MASX J15474443+3712178 LIN 15 47 44.414 +37 12 17.97   15.20       ~ 35 0
26 NGC 6012 G 15 54 13.9058160507 +14 36 04.281115506   13.209 12.420 11.870 11.195 ~ 117 0
27 MCG+02-41-010 G 16 08 32.758 +09 36 24.43   14.90       ~ 27 0
28 IC 1211 G 16 16 51.9758469840 +53 00 21.700670750   13.80       ~ 54 0
29 MCG+04-38-045 Q? 16 17 56.880 +22 56 43.98   15.00       ~ 30 0
30 NGC 6524 G 17 59 14.7253142760 +45 53 13.433793798   14.00       ~ 52 0
31 SN 2010hh SN* 17 59 18.38 +45 52 32.2           SNIapec 11 1
32 2MASX J21005603+1019248 G 21 00 56.030 +10 19 24.89   15.50       ~ 20 0
33 NAME Local Group GrG ~ ~           ~ 7074 0

    Equat.    Gal    SGal    Ecl

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2020.10.26-14:07:43

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