2000ApJ...536..153P


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.09CEST02:14:07

2000ApJ...536..153P - Astrophys. J., 536, 153-172 (2000/June-2)

New techniques for relating dynamically close galaxy pairs to merger and accretion rates: application to the second southern sky redshift survey.

PATTON D.R., CARLBERG R.G., MARZKE R.O., PRITCHET C.J., DA COSTA L.N. and PELLEGRINI P.S.

Abstract (from CDS):

The galaxy merger and accretion rates, and their evolution with time, provide important tests for models of galaxy formation and evolution. Close pairs of galaxies are the best available means of measuring redshift evolution in these quantities. In this study, we introduce two new pair statistics, which relate close pairs to the merger and accretion rates. We demonstrate the importance of correcting these (and other) pair statistics for selection effects related to sample depth and completeness. In particular, we highlight the severe bias that can result from the use of a flux-limited survey. The first statistic, Nc, gives the number of companions per galaxy within a specified range in absolute magnitude. Nc is directly related to the galaxy merger rate. The second statistic, Lc, gives the total luminosity in companions, per galaxy. This quantity can be used to investigate the mass accretion rate. Both Nc and Lc are related to the galaxy correlation function ξ and luminosity function φ(M) in a straightforward manner. Both statistics have been designed with selection effects in mind. We outline techniques that account for various selection effects and demonstrate the success of this approach using Monte Carlo simulations. If one assumes that clustering is independent of luminosity (which is appropriate for reasonable ranges in luminosity), then these statistics may be applied to flux-limited surveys. These techniques are applied to a sample of 5426 galaxies in the Second Southern Sky Redshift Survey (SSRS2). This is the first large, well-defined low-z survey to be used for pair statistics. Using close (5 h–1 kpc≤rp≤20 h–1 kpc) dynamical (Δv≤500 km.s–1) pairs, we find Nc(-21≤MB≤-18)=0.0226±0.0052 and Lc(-21≤MB≤-18)=0.0216±0.0055x1010 h2 L at z=0.015. These are the first secure estimates of low-redshift pair statistics, and they will provide local benchmarks for ongoing and future pair studies. If Nc remains fixed with redshift, simple assumptions imply that ∼6.6% of present day galaxies with -21≤MB≤-18 have undergone mergers since z=1. When applied to redshift surveys of more distant galaxies, these techniques will yield the first robust estimates of evolution in the galaxy merger and accretion rates.

Abstract Copyright:

Journal keyword(s): Galaxies: Distances and Redshifts - Galaxies: Interactions

Nomenclature: Tables 1, 2: [PCM2000] NN (Nos 1-39).

Simbad objects: 40

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Number of rows : 40

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 MCG-01-01-062 GiG 00 16 24.3594228306 -06 19 19.062114184   15   12.77   ~ 14 0
2 APG 121 IG 00 59 24.8 -04 47 57           ~ 12 0
3 [PCM2000] 16 PaG 01 08 49.14 -28 35 26.8           ~ 4 0
4 [PCM2000] 17 PaG 01 12 33.48 -04 08 35.7           ~ 4 0
5 [PCM2000] 18 PaG 01 15 36.9 -06 35 33           ~ 1 0
6 [PCM2000] 19 PaG 01 18 49.5 -16 48 15           ~ 1 0
7 [PCM2000] 20 PaG 01 36 23.78 -37 19 51.7           ~ 4 0
8 [PCM2000] 21 PaG 02 09 22.6 -10 08 03           ~ 1 0
9 APG 309 IG 02 29 10.0 -10 49 54           ~ 19 0
10 [PCM2000] 23 PaG 02 58 10.3 -10 21 23           ~ 1 0
11 [PCM2000] 24 PaG 03 06 05.91 -39 01 41.6           ~ 3 0
12 [PCM2000] 25 PaG 03 11 16.98 -08 54 44.2           ~ 3 0
13 [PCM2000] 26 PaG 03 24 48.64 -03 01 44.3           ~ 5 0
14 [PCM2000] 27 PaG 04 12 01.8 -32 51 42           ~ 2 0
15 NGC 1540 IG 04 15 10.35 -28 29 03.6           ~ 16 0
16 [PCM2000] 29 PaG 04 31 33.0 -29 45 08           ~ 1 0
17 [PCM2000] 1 PaG 11 20 32.2 -10 16 10           ~ 1 0
18 [PCM2000] 2 PaG 12 26 14.4 -07 40 57           ~ 1 0
19 [PCM2000] 3 PaG 12 42 17.7 -05 46 59           ~ 1 0
20 [PCM2000] 4 PaG 12 52 30.1 -15 31 02           ~ 1 0
21 [PCM2000] 5 PaG 12 53 07.5 -09 12 04           ~ 1 0
22 [PCM2000] 6 PaG 13 03 58.6 -11 29 44           ~ 1 0
23 [PCM2000] 7 PaG 13 19 45.4 -27 25 08           ~ 1 0
24 [PCM2000] 8 PaG 13 26 00.4 -26 40 34           ~ 1 0
25 [PCM2000] 9 PaG 13 33 13.0 -16 07 49           ~ 1 0
26 [PCM2000] 10 PaG 13 35 16.0 -10 53 14           ~ 1 0
27 [PCM2000] 11 PaG 14 00 24.4 -23 18 24           ~ 1 0
28 [PCM2000] 12 PaG 14 04 41.80 -24 49 46.0           ~ 4 0
29 KPG 419 PaG 14 13 17.38 -03 10 41.8   12.6       ~ 9 0
30 MCG-04-50-008 GiG 21 11 40.0342961004 -23 09 41.672466896   15.10   13.78   ~ 16 0
31 ESO 530-20 CGG 21 11 41.2 -23 09 45           ~ 3 1
32 [PCM2000] 31 PaG 22 02 05.33 -31 58 56.5           ~ 2 0
33 [PCM2000] 32 PaG 22 06 13.8 -27 57 17           ~ 1 0
34 [PCM2000] 33 PaG 22 21 53.12 -25 34 59.3           ~ 4 0
35 ESO 406-20 PaG 22 55 21.2 -33 53 29           ~ 6 0
36 [PCM2000] 35 PaG 22 58 05.06 -03 46 45.2           ~ 4 0
37 [PCM2000] 36 PaG 23 00 08.9 -12 49 15           ~ 1 0
38 [PCM2000] 37 PaG 23 03 11.5 -08 59 28           ~ 1 0
39 [PCM2000] 38 PaG 23 26 24.76 -39 13 16.2           ~ 4 0
40 [PCM2000] 39 PaG 23 47 45.5 -28 08 15           ~ 1 0

    Equat.    Gal    SGal    Ecl

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2020.08.09-02:14:07

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