2007MNRAS.377.1795C


Query : 2007MNRAS.377.1795C

2007MNRAS.377.1795C - Mon. Not. R. Astron. Soc., 377, 1795-1807 (2007/June-1)

Molecular gas and star formation in the SAURON early-type galaxies.

COMBES F., YOUNG L.M. and BUREAU M.

Abstract (from CDS):

We present the results of a survey of CO emission in 43 of the 48 representative E/S0 galaxies observed in the optical with the SAURON integral-field spectrograph. The CO detection rate is 12/43 or 28 per cent. This is lower than previous studies of early-types but can probably be attributed to different sample selection criteria. As expected, earlier type, more luminous and massive galaxies have a relatively lower molecular gas content. We find that CO-rich galaxies tend to have higher Hβ but lower Fe5015 and Mgb absorption indices than CO-poor galaxies. Those trends appear primarily driven by the age of the stars, a hypothesis supported by the fact that the galaxies with the strongest evidence of star formation are also the most CO-rich. In fact, the early-type galaxies from the current sample appear to extend the well-known correlations between far-infrared (FIR) luminosity, dust mass and molecular mass of other galaxy types. The star formation interpretation is also consistent with the SAURON galaxies' radio continuum and FIR flux ratios, and their inferred star formation efficiencies are similar to those in spiral galaxies. It thus appears that we have identified the material fueling (residual) star formation in early-type galaxies, and have demonstrated that it is actively being transformed. Nevertheless, the lack of strong correlations between the CO content and most stellar parameters is compatible with the idea that, in a significant number of sample galaxies, the molecular gas has been accreted from the outside and has properties rather independent from the old, pre-existing stellar component.

Abstract Copyright: 2007 The Authors. Journal compilation © 2007 RAS

Journal keyword(s): galaxies: elliptical and lenticular, cD - galaxies: evolution - galaxies: ISM - galaxies: structure - radio lines: galaxies

Simbad objects: 54

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Number of rows : 54
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 NGC 474 GiP 01 20 06.6870520512 +03 24 55.861973100 12.75 12.37 11.51 11.42 10.56 ~ 342 1
2 NGC 524 GiP 01 24 47.7429545736 +09 32 20.089023900   11.5       ~ 444 1
3 NGC 821 G 02 08 21.1358498040 +10 59 41.832436704   12.210 11.310 10.739 9.744 ~ 558 0
4 NGC 1023 IG 02 40 24.0133575864 +39 03 47.663392896 10.91 10.35 9.35 7.83   ~ 640 2
5 NGC 2549 G 08 18 58.3507032336 +57 48 11.022298740   12.1       ~ 242 0
6 NGC 2679 GiP 08 51 32.9418201528 +30 51 55.211530176   14.3       ~ 68 0
7 NGC 2695 GiG 08 54 27.0744277224 -03 04 00.993904032   13.3       ~ 106 0
8 NGC 2685 Sy2 08 55 34.7027817000 +58 44 03.876540108   13.68 12.70     ~ 421 1
9 NGC 2699 GiG 08 55 48.7851438216 -03 07 39.575588736   13.6       ~ 101 0
10 NGC 2768 SyG 09 11 37.504 +60 02 13.95 11.30 10.84 9.87     ~ 488 2
11 NGC 2974 Sy2 09 42 33.2918467632 -03 41 57.038311068   12.19   10.77   ~ 426 0
12 NGC 3032 AGN 09 52 08.1524118072 +29 14 10.364182440   13.87 13.28     ~ 244 0
13 NGC 3156 GiG 10 12 41.2457368824 +03 07 45.701284764   12.8       ~ 228 0
14 NGC 3377 GiP 10 47 42.400 +13 59 08.30 11.55 11.24 10.38     ~ 756 1
15 M 105 LIN 10 47 49.600 +12 34 53.87   10.56 9.76 9.12 8.18 ~ 1432 0
16 NGC 3384 GiG 10 48 16.8855574392 +12 37 45.371165844   10.0       ~ 579 1
17 NGC 3414 GiP 10 51 16.2099174408 +27 58 30.297624852   12.1       ~ 316 0
18 NGC 3489 GiG 11 00 18.5483994744 +13 54 04.206202668 11.46 11.12 10.29     ~ 385 1
19 NGC 3608 LIN 11 16 58.967 +18 08 54.71   11.7       ~ 496 0
20 NGC 4150 GiG 12 10 33.655 +30 24 05.35 12.72 12.44 11.64     ~ 300 2
21 NGC 4261 LIN 12 19 23.2160630 +05 49 29.700024   13.92 12.87     ~ 1188 0
22 NGC 4262 GiG 12 19 30.5694336288 +14 52 39.517143276 13.00 12.49 11.55     ~ 346 1
23 NGC 4270 GiP 12 19 49.4714861496 +05 27 48.394930572   13.3       ~ 175 0
24 NGC 4278 LIN 12 20 06.82538739 +29 16 50.7134758 11.54 11.09 10.16     ~ 918 2
25 NGC 4365 GiG 12 24 28.228 +07 19 03.07   11.5       ~ 823 0
26 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1715 2
27 M 85 GiP 12 25 24.053 +18 11 27.89   10.2       ~ 631 0
28 NGC 4387 GiG 12 25 41.6768484264 +12 48 37.804615956 13.42 13.01 12.12   10.87 ~ 382 1
29 NAME Virgo Cluster ClG 12 26 32.1 +12 43 24           ~ 6377 0
30 NGC 4458 GiP 12 28 57.5613938232 +13 14 30.946545276 13.27 12.93 12.07     ~ 403 2
31 NGC 4459 H2G 12 29 00.0329905416 +13 58 42.826603332   11.6       ~ 522 0
32 NGC 4473 GiG 12 29 48.878 +13 25 45.55 11.60 11.16 10.20     ~ 627 1
33 NGC 4477 Sy2 12 30 02.1955766304 +13 38 11.543715888 11.98 11.38 10.42     ~ 386 2
34 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 6826 3
35 IRAS 12315+0758 GiG 12 34 03.029 +07 41 56.90   10.6       ~ 642 0
36 NGC 4546 GiG 12 35 29.4931619736 -03 47 35.383858656 11.89 11.30 10.32     ~ 214 1
37 NGC 4550 GiP 12 35 30.5913588048 +12 13 14.921166792 12.97 12.56 11.68     ~ 527 1
38 M 89 LIN 12 35 39.80733343 +12 33 22.8308657 11.29 10.73 9.75     ~ 968 2
39 NGC 4564 GiG 12 36 26.9869512504 +11 26 21.204472848 12.51 12.05 11.12     ~ 580 1
40 NGC 4570 GiG 12 36 53.3828233728 +07 14 47.697174852   11.8       ~ 322 0
41 M 59 GiG 12 42 02.2581375168 +11 38 48.909507756   11.0       ~ 677 0
42 NGC 4660 GiP 12 44 31.9814021280 +11 11 25.739106972   12.1       ~ 409 0
43 NGC 5198 GiP 13 30 11.3858465016 +46 40 14.667297420   13.2       ~ 169 0
44 NGC 5308 GiP 13 47 00.4361008824 +60 58 23.334066588   12.5       ~ 196 0
45 NGC 5813 LIN 15 01 11.2302420864 +01 42 07.141569696 12.00 11.45 10.46 10.06   ~ 612 1
46 NGC 5831 GiG 15 04 07.0002600408 +01 13 11.705607012   13.1   11.19   ~ 286 0
47 NGC 5838 GiP 15 05 26.2447857696 +02 05 57.349108392   12.1   10.26   ~ 230 0
48 NGC 5845 GiG 15 06 00.7823239488 +01 38 01.704838596   13.8 11.20 12.06 9.94 ~ 367 0
49 NGC 5846 BiC 15 06 29.253 +01 36 20.29   11.9   9.74   ~ 821 1
50 NGC 5982 LIN 15 38 39.778 +59 21 21.21   12.4       ~ 286 0
51 NGC 6548 GiP 18 05 59.2439762424 +18 35 14.256371040   13.1       ~ 72 0
52 NGC 7252 IG 22 20 44.7748209648 -24 40 41.909518200 12.26 12.46 12.06 11.57   ~ 687 1
53 NGC 7332 GiP 22 37 24.5373044952 +23 47 53.830708800   12.0       ~ 365 0
54 NGC 7457 G 23 00 59.9263288440 +30 08 41.764398792   11.04 11.87     ~ 424 0

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2023.01.30-06:08:19

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