2000ApJ...541..624S


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.29CET21:42:08

2000ApJ...541..624S - Astrophys. J., 541, 624-643 (2000/October-1)

Interstellar gas in the NGC 4410 galaxy group.

SMITH B.J.

Abstract (from CDS):

We present new radio continuum, 21 cm H I, and 2.6 mm CO data for the peculiar radio galaxy NGC 4410A and its companion NGC 4410B and compare with available optical and X-ray maps. Our radio continuum maps show an asymmetric double-lobed structure, with a high surface brightness lobe extending 3'.6 (∼100 kpc) to the southeast and a 6'.2 (∼180 kpc) low surface brightness feature in the northwest. Molecular gas is abundant in NGC 4410A, with MH2∼4x109 M (using the standard Galactic conversion factor) but is undetected in NGC 4410B. H I is less abundant, with M_HI_∼109 M for the pair. Our H I map shows a 3x108 M H I tail extending 1'.7 (50 kpc) to the southeast of the pair, coincident with a faint optical tail and partially overlapping with the southeastern radio lobe. The H I tail is anticoincident with a 2' (56 kpc) long X-ray structure aligned with a stellar bridge that connects the pair to a third galaxy. If this X-ray emission is associated with the group, we infer (3-8)x108 M of hot gas in this feature. This may be either intracluster gas or shocked gas associated with the bridge. Our detection of abundant interstellar gas in this pair, including an H I-rich tidal tail near the southeastern radio lobe, suggests that the observed distortions in this lobe may have been caused by the interstellar medium in this system. The gravitational interaction of the two galaxies and the subsequent motion of the interstellar medium in the system relative to the jet may have produced sufficient ram pressure to bend and distort the radio jet. An alternative hypothesis is that the jet was distorted by ram pressure due to an intracluster medium, although the small radial velocity of NGC 4410A relative to the group and the lack of diffuse X-ray emission in the group makes this less likely unless the group is not virialized or is in the process of merging with another group. Using our VLA data, we also searched for H I counterparts to the other 10 known members of the NGC 4410 group and CO from three other galaxies in the inner group. In our velocity range of 6690-7850 km.s–1, we detected six other galaxies above our H I sensitivity limits of 2x108 M for the inner group and 4x108 M for the outer group. The total H I in the group is 1.4x1010 M, 80% of which arises from four galaxies in the outer group. Three of these galaxies (VCC 822, VCC 831, and VCC 847) are spirals with M_HI/LB_ ratios typical of field galaxies, while FGC 170A appears to be a gas-rich dwarf galaxy (MB~-18, M_HI_∼3x109 M). In the inner group, the SBa galaxy NGC 4410D (VCC 934) was detected in H I and CO (M_HI_∼5x108 M and MH2∼8x108 M) and has a 1' (28 kpc) long H I tail that points toward the nearby disk galaxy NGC 4410F. NGC 4410F was also detected in H I (M_HI_∼4x108 M). The galaxies in the inner group appear to be somewhat deficient in H I compared to their blue luminosities, suggesting phase changes driven by galaxy-galaxy or galaxy-intracluster medium encounters.

Abstract Copyright:

Journal keyword(s): galaxies: individual (NGC 4410) - Galaxies: Interactions - Galaxies: ISM

Nomenclature: Table 1: [S2000g] Anon N (Nos 1-4).

Simbad objects: 46

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Number of rows : 46

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 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 2957 2
2 NGC 1052 GiP 02 41 04.79851 -08 15 20.7517 11.84 11.41 10.47 10.71   ~ 1155 2
3 NGC 1316 GiP 03 22 41.789 -37 12 29.52 9.81 9.15 8.53 7.66   ~ 1216 1
4 2MASX J03513577-2744345 Sy2 03 51 35.7642004421 -27 44 34.893303602   16.0       ~ 138 1
5 NAME Pictor A Sy1 05 19 49.7230919028 -45 46 43.855209977   15.73 15.77 14.85   ~ 563 1
6 2MASX J06363227-2034532 Sy2 06 36 32.2513803013 -20 34 53.200836612   18.27 17.58     ~ 122 4
7 2MASX J08400233+2949027 Sy2 08 40 02.336 +29 49 02.73   20.00 19.62     ~ 155 1
8 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5371 6
9 NGC 4278 LIN 12 20 06.8253868 +29 16 50.713486 11.54 11.09 10.16     ~ 892 2
10 2MASX J12253011+0904211 GiG 12 25 30.114 +09 04 21.15           ~ 2 0
11 LEDA 40558 GiC 12 25 39.406 +08 54 43.79   15.6       ~ 22 0
12 LEDA 1358226 GiC 12 25 42.992 +09 01 35.19   15.6       ~ 18 0
13 2MASX J12254509+0859511 GiG 12 25 45.099 +08 59 51.14           ~ 4 0
14 LEDA 1356246 GiC 12 25 50.948 +08 55 14.88   14.9       ~ 21 0
15 LEDA 40640 G 12 26 05.90 +08 58 02.7   16       ~ 17 0
16 NGC 4410 LIN 12 26 28.2951188292 +09 01 11.502700687   13.6       ~ 107 1
17 LEDA 40693 LSB 12 26 28.65 +08 47 43.3   21       ~ 10 0
18 Mrk 1325B GiP 12 26 29.580 +09 01 09.27   13.6       ~ 58 1
19 NGC 4411 GiP 12 26 29.859 +08 52 20.08   14.4       ~ 118 0
20 NAME NGC 4410A+B Tail ? 12 26 30.8 +09 00 35           ~ 2 1
21 2MASX J12263162+0907234 GiC 12 26 31.6491040364 +09 07 23.129056165   16.19       ~ 15 0
22 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5909 0
23 [S2000g] Anon 3 GiG 12 26 32.824 +09 03 00.78           ~ 5 0
24 IC 790 LIN 12 26 35.502 +09 02 07.74   15.2       ~ 38 0
25 LEDA 1358003 G 12 26 40.785 +09 00 53.63           ~ 12 0
26 MCG+02-32-054 GiG 12 26 44.2906074649 +09 02 54.507995226   15.3       ~ 34 0
27 LEDA 40737 G 12 26 44.336 +08 49 25.32   19       ~ 22 0
28 UGC 7546 GiP 12 26 47.2273544883 +08 53 04.461237649   14.4       ~ 161 0
29 2MASX J12264809+0857424 GiC 12 26 48.0988772553 +08 57 42.092287017           ~ 7 0
30 2MASX J12265781+0901048 GiC 12 26 57.8177861251 +09 01 05.386097583   17.19       ~ 9 0
31 2MASX J12265916+0857318 GiC 12 26 59.2066520237 +08 57 31.573197685   15.6       ~ 19 0
32 2MASX J12270368+0905428 G 12 27 03.684 +09 05 42.86           ~ 4 0
33 LEDA 92945 G 12 27 07.853 +09 13 08.60           ~ 6 0
34 2MASX J12270935+0911028 GiG 12 27 09.3315566365 +09 11 02.961222399           ~ 3 0
35 LEDA 40810 G 12 27 11.926 +08 50 24.33   20       ~ 16 0
36 2MASX J12272547+0857035 GiC 12 27 25.4378734093 +08 57 02.910655939   17.34       ~ 7 0
37 NGC 4410K GiC 12 27 28.5 +09 02 32           ~ 4 0
38 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6283 3
39 NGC 4782 rG 12 54 35.698 -12 34 06.92   13 12.75 13.11   ~ 140 2
40 NGC 4783 GiP 12 54 36.36 -12 33 30.2   12.5 12.80     ~ 118 1
41 3C 278 QSO 12 54 38.3 -12 33 27     11.6     ~ 120 3
42 NAME Centaurus A Sy2 13 25 27.61509104 -43 01 08.8056025   8.18 6.84 6.66   ~ 4031 3
43 3C 286 Sy1 13 31 08.2885060664 +30 30 32.960825108   17.51 17.25     ~ 3777 1
44 NGC 6328 QSO 17 23 41.02938963 -65 00 36.6113150   13.17 13.2 11.45 12.2 ~ 210 1
45 NGC 7236 LIN 22 14 44.989 +13 50 47.43   14.3 14.3     ~ 258 2
46 NAME NGC 4410 Group GrG ~ ~           ~ 8 1

    Equat.    Gal    SGal    Ecl

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2020.10.29-21:42:08

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