2010A&A...523A..75S


Query : 2010A&A...523A..75S

2010A&A...523A..75S - Astronomy and Astrophysics, volume 523, A75-75 (2010/11-2)

Cold gas in massive early-type galaxies: the case of NGC 1167.

STRUVE C., OOSTERLOO T., SANCISI R., MORGANTI R. and EMONTS B.H.C.

Abstract (from CDS):

We present a study of the morphology and kinematics of the neutral hydrogen in the gas-rich (MHI=1.5x1010M), massive early-type galaxy NGC 1167, which was observed with the Westerbork Synthesis Radio Telescope (WSRT). The HIIs located in a 160 kpc disk (≃3xD25) and has low surface density (≤2M pc–2). The disk shows regular rotation for r<65 kpc but several signs of recent and ongoing interaction and merging with fairly massive companions are observed. No population of cold gas clouds is observed - in contrast to what is found in some spiral galaxies. This suggests that currently the main mechanism bringing in cold gas to the disk is the accretion of fairly massive satellite galaxies, rather than the accretion of a large number of small gas clumps. NGC 1167 is located in a (gas-) rich environment: we detect eight companions with a total Himass of ∼6x109M within a projected distance of 350kpc. Deep optical images show a disrupted satellite at the northern edge of the Hidisk. The observed rotation curve shows a prominent bump of about 50km/s (in the plane of the disk) at r≃1.3xR25. This feature in the rotation curve occurs at the radius where the Hisurface density drops significantly and may be due to large-scale streaming motions in the disk. We suspect that both the streaming motions and the Hidensity distribution are the result of the interaction/accretion with the disrupted satellite. Like in other galaxies with wiggles and bumps in the rotation curve, Hiscaling describes the observed rotation curve best. We suggest that interactions create streaming motions and features in the Hidensity distribution and that this is the reason for the success of Hiscaling in fitting such rotation curves.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: individual: NGC 1167 - galaxies: kinematics and dynamics - galaxies: structure - galaxies: ISM

Nomenclature: Fig. 1, Table 3: [SOS2010] N (Nos 1-8).

Simbad objects: 20

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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 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2692 2
2 NGC 891 H2G 02 22 32.907 +42 20 53.95 11.08 10.81 9.93 7.86   ~ 1595 2
3 UGC 2465 GiG 03 00 37.4253616656 +35 10 08.972947812   14.7       ~ 29 0
4 [SOS2010] 5 G 03 01 22.20 +35 14 05.5           ~ 1 0
5 NGC 1167 LIN 03 01 42.3322774176 +35 12 20.300948892   13.84 12.77     ~ 327 2
6 2MASX J03014864+3505423 GiC 03 01 48.649 +35 05 42.37           ~ 4 0
7 AGC 131436 G 03 01 49.10 +35 29 01.2           ~ 3 0
8 [SOS2010] 4 G 03 02 09.10 +35 11 12.0           ~ 1 0
9 [SOS2010] 6 G 03 02 09.50 +35 16 30.8           ~ 1 0
10 [SOS2010] 7 G 03 02 30.70 +35 16 58.4           ~ 1 0
11 [SOS2010] 1 G 03 02 47.80 +35 04 28.4           ~ 1 0
12 UGC 2916 G 04 02 33.9170114400 +71 42 21.124283292   14.9       ~ 55 2
13 ICRF J054236.1+495107 Sy1 05 42 36.1380355416 +49 51 07.232213736   18.45 17.80 17.210   ~ 1393 1
14 NGC 2403 AGN 07 36 51.3381434280 +65 36 09.650825640 9.31 8.84 8.38 8.19   ~ 1701 1
15 NGC 2997 GiG 09 45 38.7542237472 -31 11 27.345810192   9.97 9.41 8.84 9.9 ~ 400 0
16 NGC 2985 Sy1 09 50 22.233 +72 16 43.13   11.37 10.61     ~ 236 1
17 NGC 3898 LIN 11 49 15.370 +56 05 03.66   11.7       ~ 285 1
18 UGC 7321 EmG 12 17 34.021 +22 32 23.35   14.07   13.21   ~ 244 0
19 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2384 2
20 UGC 11852 G 21 55 59.3494136184 +27 53 54.073166136   15.0       ~ 47 0

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2022.08.12-08:12:33

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