2004MNRAS.354..851R


Query : 2004MNRAS.354..851R

2004MNRAS.354..851R - Mon. Not. R. Astron. Soc., 354, 851-869 (2004/November-1)

The photometric properties of isolated early-type galaxies.

REDA F.M., FORBES D.A., BEASLEY M.A., O'SULLIVAN E.J. and GOUDFROOIJ P.

Abstract (from CDS):

Isolated galaxies are important because they probe the lowest density regimes inhabited by galaxies. We define a sample of 36 nearby isolated early-type galaxies for further study. Our isolation criteria require them to have no comparable-mass neighbours within 2 B-band magnitudes, 0.67 Mpc in the plane of the sky and 700 km/s in recession velocity. New wide-field optical imaging of 10 isolated galaxies with the Anglo-Australian Telescope confirms their early-type morphology and relative isolation. We also present imaging of four galaxy groups as a control sample. The isolated galaxies are shown to be more gravitationally isolated than the group galaxies. We find that the isolated early-type galaxies have a mean effective colour of (B-R)e= 1.54±0.14, similar to their high-density counterparts. They reveal a similar colour-magnitude relation slope and small intrinsic scatter to cluster ellipticals. They also follow the Kormendy relation of surface brightness versus size for luminous cluster galaxies. Such properties suggest that the isolated galaxies formed at a similar epoch to cluster galaxies, such that the bulk of their stars are very old. However, our galaxy modelling reveals evidence for dust lanes, plumes, shells, boxy and disc isophotes in four out of nine galaxies. Thus at least some isolated galaxies have experienced a recent merger/accretion event, which may have induced a small burst of star formation. We derive luminosity functions for the isolated galaxies and find a faint slope of -1.2, which is similar to the `universal' slope found in a wide variety of environments. We examine the number density distribution of galaxies in the field of the isolated galaxies. Only the very faintest dwarf galaxies (MR≳-15.5) appear to be associated with the isolated galaxies, whereas any intermediate-luminosity galaxies appear to lie in the background. Finally, we discuss possible formation scenarios for isolated early-type galaxies. Early epoch formation and a merger/accretion of galaxies are possible explanations. The collapse of a large, virialized group is an unlikely explanation, but that of a poor group remains viable.

Abstract Copyright: 2004 RAS

Journal keyword(s): galaxies: elliptical and lenticular, cD - galaxies: luminosity function, mass function - galaxies: photometry - galaxies: structure

Simbad objects: 47

goto Full paper

goto View the references in ADS

Number of rows : 47
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 ESO 194-21 G 00 29 41.6309742864 -51 31 14.334312612   13.35   11.79   ~ 33 0
2 MCG-01-03-018 GiG 00 50 27.521 -05 51 30.65   13   12.66   ~ 22 0
3 NGC 682 GiG 01 49 04.5807995352 -14 58 29.236552788   13   12.41   ~ 28 0
4 ESO 153-3 GiG 01 58 18.2210925960 -54 12 57.205608444   13.79   12.26   ~ 22 0
5 NGC 821 G 02 08 21.1358498040 +10 59 41.832436704   12.210 11.310 10.739 9.744 ~ 556 0
6 UGC 1735 GiG 02 15 38.2918326600 +35 31 24.657906468   14.0       ~ 20 0
7 NGC 1041 G 02 40 25.2339420000 -05 26 25.542337020   14   12.78   ~ 23 0
8 NGC 1045 GiG 02 40 29.1212142384 -11 16 39.204299784   13   11.92   ~ 28 0
9 UGC 2328 G 02 50 59.6692366896 +37 27 59.854343940   13.8       ~ 19 0
10 RXC J0252.8-0116 ClG 02 52 49.4 -01 16 27           ~ 101 0
11 NGC 1132 GiG 02 52 51.82 -01 16 29.0   13.9   12.16   ~ 157 0
12 NGC 1162 GiG 02 58 55.9741205400 -12 23 55.151620944   13   12.11   ~ 35 0
13 MCG-02-13-009 GiG 04 48 12.6520695672 -13 40 01.421833872   14   12.41   ~ 22 0
14 NGC 2110 Sy2 05 52 11.3768668776 -07 27 22.507465392   14.77 13.51 11.86   ~ 634 1
15 NGC 2128 G 06 04 34.2343501608 +57 37 39.553968936   13.7       ~ 31 0
16 NGC 2271 G 06 42 52.9712961264 -23 28 33.847437000   13.17   11.67   ~ 46 0
17 NGC 2865 GiG 09 23 30.205 -23 09 41.37   12.39 11.43 11.06   ~ 233 0
18 MCG-03-26-030 G 10 11 18.9636806880 -17 12 15.588132804   14   12.49   ~ 22 0
19 MCG-01-27-013 GiG 10 32 12.3050915856 -09 14 20.240155140   14   13.17   ~ 22 0
20 ESO 318-21 GiG 10 53 05.9569438464 -40 19 44.791775544   13.91   12.27   ~ 46 0
21 NGC 3497 LIN 11 07 18.0886738608 -19 28 17.398110144   12.79       ~ 47 0
22 NGC 3529 EmG 11 07 19.1234279640 -19 33 20.079920808   14.66       ~ 24 0
23 USGC S160 GrG 11 07 24.5 -19 43 01           ~ 2 0
24 NGC 3557 rG 11 09 57.653 -37 32 21.02   11.50 10.40 9.79   ~ 266 2
25 NGC 3562 GiG 11 12 58.6870089408 +72 52 45.356936988   13.2       ~ 45 0
26 NGC 4240 G 12 17 24.3835917192 -09 57 05.987409300   14   12.26   ~ 25 0
27 NGC 4271 LIN 12 19 32.5878502080 +56 44 11.701047336   13.7       ~ 27 0
28 ESO 218-2 GiG 12 21 08.6646916056 -52 35 09.855785256   13.7       ~ 27 0
29 NAME Virgo Cluster ClG 12 26 32.1 +12 43 24           ~ 6355 0
30 NGC 4555 LIN 12 35 41.1918612696 +26 31 23.087609256   13.5       ~ 88 0
31 NGC 4697 GiG 12 48 35.8981498824 -05 48 02.482374564   10.97   9.83   ~ 837 0
32 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4570 2
33 NGC 5266 GiG 13 43 02.0849196792 -48 10 10.000751592   11.89 11.14 11.9 11.3 ~ 159 0
34 ESO 509-100 G 13 43 51.1179582600 -27 21 42.912769536   15.13   14.08   ~ 18 0
35 IC 4320 GiP 13 44 03.7109865240 -27 13 54.033092616   14.25   12.70   ~ 40 0
36 IC 1211 G 16 16 51.9794910072 +53 00 21.703117284   13.80       ~ 55 0
37 NGC 6172 G 16 22 10.3020013728 -01 30 53.448782508   14.28       ~ 36 0
38 NGC 6411 G 17 35 32.8446342384 +60 48 48.236693796   13.2       ~ 109 0
39 NGC 6653 G 18 44 38.4394986120 -73 15 48.022002504   13.47   11.99   ~ 27 0
40 NGC 6702 G 18 46 57.5835209136 +45 42 20.305242180 15.30 14.73 13.05     ~ 137 0
41 NGC 6776 G 19 25 19.1485272024 -63 51 36.633840408   13.19 11.99 11.59   ~ 85 0
42 NGC 6799 G 19 32 16.5461323248 -55 54 28.294280748   13.41   11.98   ~ 43 0
43 NGC 6849 G 20 06 15.6180340992 -40 11 53.765406996   12.90       ~ 66 0
44 ESO 462-15 G 20 23 13.8515900784 -27 42 52.348659840   12.92   11.37   ~ 48 0
45 ESO 107-4 G 21 03 29.6532884904 -67 10 52.611761748   12.98 11.87 11.63   ~ 61 0
46 NGC 7330 GiG 22 36 56.1612063984 +38 32 53.195480196   13.6       ~ 20 0
47 NGC 7796 G 23 58 59.7964010520 -55 27 29.983148100   12.36 11.30 10.82   ~ 111 0

To bookmark this query, right click on this link: simbad:objects in 2004MNRAS.354..851R and select 'bookmark this link' or equivalent in the popup menu


2022.11.26-11:00:01

© Université de Strasbourg/CNRS

    • Contact