2003A&A...406...87B


Query : 2003A&A...406...87B

2003A&A...406...87B - Astronomy and Astrophysics, volume 406, 87-103 (2003/7-4)

Molecular gas in the central regions of the latest-type spiral galaxies.

BOEKER T., LISENFELD U. and SCHINNERER E.

Abstract (from CDS):

Using the IRAM 30m telescope, we have surveyed an unbiased sample of 47 nearby spiral galaxies of very late (Scd-Sm) Hubble-type for emission in the 12CO(1-0) and (2-1) lines. The sensitivity of our data (a few mK) allows detection of about 60% of our sample in at least one of the CO lines. The median detected H2 mass is 1.4x107M within the central few kpc, assuming a standard conversion factor. We use the measured line intensities to complement existing studies of the molecular gas content of spiral galaxies as a function of Hubble-type and to significantly improve the statistical significance of such studies at the late end of the spiral sequence. We find that the latest-type spirals closely follow the correlation between molecular gas content and galaxy luminosity established for earlier Hubble types. The molecular gas in late-type galaxies seems to be less centrally concentrated than in earlier types. We use Hubble Space Telescope optical images to correlate the molecular gas mass to the properties of the central galaxy disk and the compact star cluster that occupies the nucleus of most late-type spirals. There is no clear correlation between the luminosity of the nuclear star cluster and the molecular gas mass, although the CO detection rate is highest for the brightest clusters. It appears that the central surface brightness of the stellar disk is an important parameter for the amount of molecular gas at the galaxy center. Whether stellar bars play a critical role for the gas dynamics remains unclear, in part because of uncertainties in the morphological classifications of our sample.

Abstract Copyright:

Journal keyword(s): galaxies: spiral - galaxies: ISM - galaxies: nuclei

CDS comments: Table 1 : MCG 1-3-85 = MCG -1-3-85 in Simbad.

Simbad objects: 48

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Number of rows : 48
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 MCG-01-03-065 LSB 01 01 33.987 -07 35 18.75 12.57 12.70 12.17 12.8 12.5 ~ 77 1
2 MCG-01-03-085 LSB 01 05 04.8748186464 -06 12 44.774236980   12.1   12.1 12.0 ~ 90 0
3 NGC 428 AGN 01 12 55.709 +00 58 53.69   12.1   12.0 12.1 ~ 231 0
4 UGC 3574 GiP 06 53 10.3954201680 +57 10 40.154257452   13.9       ~ 61 0
5 UGC 3826 AG? 07 24 27.898 +61 41 38.16   13.20 12.70 12.25 11.99 ~ 43 0
6 NGC 2552 AG? 08 19 20.5355420472 +50 00 34.590204468 13.44 13.00 12.56     ~ 263 1
7 UGC 4499 GiP 08 37 41.489 +51 39 08.58   13.50       ~ 139 1
8 NGC 2805 GiP 09 20 20.3891233968 +64 06 10.716485004   11.9       ~ 211 1
9 UGC 5015 AG? 09 25 47.998 +34 16 37.54   15.7       ~ 56 0
10 UGC 5288 PaG 09 51 17.241 +07 49 32.05 15.07 14.65 14.18 13.99   ~ 88 0
11 NGC 3206 AG? 10 21 47.582 +56 55 49.47   12.7       ~ 97 0
12 NGC 3346 EmG 10 43 38.9309584368 +14 52 18.437883960   12.80       ~ 181 0
13 NGC 3423 AGN 10 51 14.3245691976 +05 50 24.158965920   12.1       ~ 175 0
14 NGC 3445 GiP 10 54 35.5131399552 +56 59 26.919652956 12.61 12.90 12.55     ~ 131 1
15 APG 24 G 10 54 40.1 +56 59 11           ~ 80 0
16 NGC 3782 GiG 11 39 20.680 +46 30 48.20   13.1       ~ 107 0
17 NGC 3906 AG? 11 49 40.496 +48 25 33.46   14.1       ~ 94 0
18 NGC 3913 AG? 11 50 38.9407040280 +55 21 13.894641396   14.2       ~ 157 0
19 UGC 6931 AG? 11 57 25.435 +57 55 48.06   14.5       ~ 55 0
20 NGC 4204 GiC 12 15 14.359 +20 39 32.68   14.3       ~ 148 0
21 NGC 4242 GiG 12 17 30.1835103480 +45 37 09.508940220   11.37 10.83     ~ 266 1
22 NGC 4299 GiP 12 21 40.548 +11 29 59.74   12.8       ~ 249 0
23 NGC 4395 Sy2 12 25 48.8633109888 +33 32 48.700168152 10.84 10.54 10.11 9.98   ~ 1168 1
24 NGC 4416 GiG 12 26 46.72487 +07 55 08.4500           ~ 166 0
25 UGC 7546 GiP 12 26 47.2270744440 +08 53 04.479254880   14.4       ~ 178 0
26 NGC 4487 EmG 12 31 04.4731449720 -08 03 14.548820040   11.7   11.9 11.6 ~ 175 0
27 NGC 4505 GiP 12 31 39.2222392512 +03 56 21.641352828   11.71       ~ 346 0
28 NAME Reinmuth 80 H2G 12 32 27.94560 +00 23 26.2716   12.7   12.8 12.9 ~ 119 0
29 NGC 4519 GiG 12 33 30.278 +08 39 16.06   12.8       ~ 277 0
30 NGC 4534 EmG 12 34 05.412 +35 31 06.07   13.20       ~ 110 0
31 NGC 4540 GiG 12 34 50.8741239840 +15 33 06.116283900   12.5       ~ 193 1
32 NGC 4618 GiP 12 41 32.8976471760 +41 09 03.185175528 11.03 11.22 10.78     ~ 326 2
33 NGC 4625 GiP 12 41 52.7121819576 +41 16 26.115765780 12.74 12.92 12.35     ~ 360 2
34 NGC 4688 GiP 12 47 46.5220541760 +04 20 09.766119156   14.5       ~ 176 1
35 NGC 4701 GiG 12 49 11.5931072112 +03 23 19.389227964   13.1       ~ 168 0
36 NGC 4775 EmG 12 53 45.707 -06 37 19.73   12.3   11.19 12.0 ~ 158 0
37 UGC 8516 EmG 13 31 52.5516205584 +20 00 03.802623984   13.80       ~ 86 0
38 NGC 5477 AG? 14 05 33.318 +54 27 37.85 13.94 14.36 14.01     ~ 205 1
39 NGC 5584 EmG 14 22 23.811 -00 23 14.82   12.80   12.0 11.8 ~ 263 0
40 NGC 5669 H2G 14 32 43.476 +09 53 25.47   13.2       ~ 195 0
41 NGC 5668 AG? 14 33 24.3419973936 +04 27 01.650790800   12.7       ~ 217 0
42 NGC 5725 GiG 14 40 58.385 +02 11 12.59   14.5       ~ 43 0
43 NGC 5789 EmG 14 56 35.3070472656 +30 14 04.558215300   13.9       ~ 62 0
44 NGC 5964 EmG 15 37 36.2103407496 +05 58 26.360661972   12.45 11.82 11.48 10.89 ~ 125 0
45 NGC 6509 GiG 17 59 25.3151920152 +06 17 12.863588496   13.4       ~ 67 0
46 UGC 12082 AG? 22 34 10.90 +32 51 40.7   15.60       ~ 69 0
47 UGC 12732 GiP 23 40 39.86 +26 14 11.1   14.5       ~ 138 0
48 NGC 7741 GiP 23 43 54.375 +26 04 32.07 11.70 11.84 11.31     ~ 286 1

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