# 2007AJ....134.1118D

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 Query : 2007AJ....134.1118D

2007AJ....134.1118D - Astron. J., 134, 1118-1123 (2007/September-0)

How dry are red mergers?

DONOVAN J.L., HIBBARD J.E. and VAN GORKOM J.H.

Abstract (from CDS):

The focus of current research in galaxy evolution has increasingly turned to understanding the effect that mergers have on the evolution of systems on the red sequence. For those interactions purported to occur dissipationlessly (so-called dry mergers), it would appear that the role of gas is minimal. However, if these mergers are not completely dry, then even low levels of gas may be detectable. The purpose of our study is to test whether early-type galaxies with H I in or around them, or wet'' ellipticals, would have been selected as dry mergers by the criteria set forth in a 2005 study by van Dokkum. To that end, we examine a sample of 20 early types from the H I Rogues Gallery with neutral hydrogen in their immediate environs. Of these, the 15 brightest and reddest galaxies match the optical dry merger criteria, but in each case, the presence of H I (for the majority, at levels >108 M), as well as significant star formation in some cases, means that they are not truly dry.

Journal keyword(s): Galaxies: Evolution - Galaxies: Interactions - Galaxies: ISM

Full paper

 Number of rows : 20
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NGC 474 GiP 01 20 06.6870520512 +03 24 55.861973100 12.75 12.37 11.51 11.42 10.56 ~ 340 1
2 NGC 680 GiP 01 49 47.2923018240 +21 58 15.142526652   13.0       ~ 138 0
3 ESO 415-26 G 02 28 20.1024142368 -31 52 51.628774224   14.6   13.14   ~ 74 0
4 NGC 1052 GiP 02 41 04.7997864552 -08 15 20.761481016 11.84 11.41 10.47 10.71   ~ 1241 2
5 NGC 1210 G 03 06 45.3516825024 -25 42 58.855024728   13.70   12.54   ~ 39 0
6 NGC 1316 GiP 03 22 41.789 -37 12 29.52 9.81 9.15 8.53 7.66   ~ 1302 1
7 IC 2006 EmG 03 54 28.4628183240 -35 58 01.673622516   12.39   10.94 11.9 ~ 201 0
8 NGC 2768 SyG 09 11 37.504 +60 02 13.95 11.30 10.84 9.87     ~ 486 2
9 NGC 2865 GiG 09 23 30.205 -23 09 41.37   12.39 11.43 11.06   ~ 233 0
10 NGC 3921 IG 11 51 06.8803989360 +55 04 43.414457484   13.4 12.64     ~ 241 0
11 NGC 4125 GiP 12 08 06.017 +65 10 26.88 11.14 10.65 9.72     ~ 412 2
12 M 85 GiP 12 25 24.053 +18 11 27.89   10.2       ~ 627 0
13 M 86 GiG 12 26 11.814 +12 56 45.49 10.32 9.83 8.90   7.50 ~ 1051 1
14 NGC 5018 GiP 13 13 01.0452720960 -19 31 05.649751992   11.71   10.31   ~ 293 1
15 NAME Centaurus A Sy2 13 25 27.6039817176 -43 01 09.493008456   8.18 6.84 6.66   ~ 4282 3
16 NGC 5903 GiG 15 18 36.529 -24 04 06.94   12.11 11.48 10.73   ~ 138 1
17 NGC 7135 AGN 21 49 46.0013389728 -34 52 34.575955536   12.25 13.30 10.84   ~ 87 0
18 NGC 7252 IG 22 20 44.7748209648 -24 40 41.909518200 12.26 12.46 12.06 11.57   ~ 686 1
19 Mrk 315 Sy1 23 04 02.6208829104 +22 37 27.433279164   15.60 14.78     ~ 143 0
20 NGC 7626 rG 23 20 42.524 +08 13 01.43   12.8       ~ 414 1

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2022.09.28-03:08:34

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