2009ApJ...695.1559D

Query : 2009ApJ...695.1559D

2009ApJ...695.1559D - Astrophys. J., 695, 1559-1566 (2009/April-3)

2MASS/SDSS close major-merger galaxy pairs.

DOMINGUE D.L., XU C.K., JARRETT T.H. and CHENG Y.

Abstract (from CDS):

We select a close "major-merger candidate" galaxy pair sample in order to calculate the Ks luminosity function (LF) and pair fraction representative of the merger/interaction component of galaxy evolution in the local universe. The pair sample (projected separation 5 h.–1 kpc ≤ r≤ 20 h.–1 kpc, Ks-band magnitude difference ΔKs≤ 1 mag) is selected by combining the Two Micron All Sky Survey (2MASS) with the Sloan Digital Sky Survey (SDSS) Data Release 5 (DR5). The resulting data set contains 340 galaxies covering 5800 deg2. A stellar mass function is also translated from the LF. A differential pair fraction displays nearly constant fraction of galaxy pairs as a function of galaxy mass from 109 to 1011.5 M☉. The differential pair fraction is less subject to absolute magnitude bias due to survey limitations than the standard total pair fraction. These results suggest that major-merger candidate pairs in the 0<z<0.1 universe are developed from ∼1.6% of the galaxy population without dependence on galaxy mass for pair components below 1011 M☉. The derived LF combined with merger model timescales give local merger rates per unit volume which decrease with masses greater than 1011 M☉.

Abstract Copyright: ∼

Journal keyword(s): galaxies: evolution - galaxies: interactions - galaxies: luminosity function, mass function - galaxies: spiral

Nomenclature: Table 1: [DXJ2009] DDD.dddd+DD.dddd N=22.

Simbad objects: 26

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Number of rows : 26
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 3639 0
2 NAME Great Attractor SCG 10 32 -46.0           ~ 617 0
3 LEDA 2563419 G 11 01 43.6412449416 +57 20 33.668166408           ~ 5 0
4 Z 39-175 G 11 25 17.0408296104 +02 27 00.569301300   15.7       ~ 7 0
5 MCG+08-22-035 GiP 11 54 40.2216658920 +49 18 37.170915012   18       ~ 4 0
6 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
7 LEDA 43727 G 12 52 50.1116750832 +46 45 27.300890124   16.3       ~ 10 0
8 LEDA 2261708 GiP 13 37 16.3427851032 +45 15 01.390685436           ~ 7 0
9 MCG+07-29-041 G 14 02 48.4200834960 +39 07 36.604058448   15       ~ 4 0
10 MCG+11-17-016 G 14 05 50.7690907440 +65 42 59.948924904   18       ~ 11 0
11 Z 18-91 SyG 14 14 32.6313004886 +01 43 53.739272823   15.5       ~ 33 2
12 2MASX J14234491+0636037 GiG 14 23 44.9367043896 +06 36 03.578422536           ~ 11 0
13 [DXJ2009] 217.0412-01.6731 G 14 28 09.9 -01 40 23           ~ 1 0
14 LEDA 1262940 G 15 14 46.9716267768 +04 03 57.637884276           ~ 9 0
15 LEDA 3088334 G 15 23 37.6948252032 +37 49 03.062636112           ~ 8 0
16 SDSS J153211.45+585428.2 G 15 32 11.4584049432 +58 54 28.214365932   17.2       ~ 3 0
17 Z 250-15 G 15 52 33.9318147672 +46 20 23.774836596   15.7       ~ 17 0
18 2MASX J15583751+3227376 G 15 58 37.5004489488 +32 27 37.937751696           ~ 4 0
19 [DXJ2009] 239.8566+02.9381 GiP 15 59 25.5774347184 +02 56 16.974067704           ~ 1 0
20 SDSS J160203.97+265739.1 AGN 16 02 03.9650368584 +26 57 39.222406260           ~ 12 0
21 LEDA 3577517 G 16 02 55.0730380344 +36 21 07.947123984           ~ 6 0
22 LEDA 2160425 G 16 05 05.2 +40 05 28           ~ 3 0
23 2MASX J16145415+3711061 BiC 16 14 54.1758030840 +37 11 06.496445184           ~ 15 0
24 MCG+08-30-036 LSB 16 37 27.5534652216 +46 50 05.516100600   16       ~ 11 0
25 LEDA 3090015 G 17 01 22.4899667016 +20 18 24.489860616           ~ 3 0
26 NAME Local Group GrG ~ ~           ~ 9325 0

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