2007A&A...466..883V


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.04CEST05:29:20

2007A&A...466..883V - Astronomy and Astrophysics, volume 466, 883-893 (2007/5-2)

Truncations of stellar disks and warps of HI-layers in edge-on spiral galaxies.

VAN DER KRUIT P.C.

Abstract (from CDS):

Edge-on spiral galaxies often have stellar disks with relatively sharp truncations and there is extensive observational material of warped HI-layers in the outer parts. Warps appear to start preferentially near the optical boundaries of the disks, but the possible relation between truncations and warps has not been studied in detail. The aim is to make a comparative study of warps and truncations in edge-on galaxies. Samples with detailed surface photometry or HI-mapping have little overlap. The Garcia-Ruiz et al. (2002A&A...394..769G) sample with extensive Westerbork HI-mapping is a candidate to be complemented with luminosity distributions from other sources. The Sloan Digital Sky Survey (and in a few cases the STScI Digital Sky Survey) has been used to provide these data. The method to identify truncations in these digital datasets has been tested using the sample of edge-on galaxies of van der Kruit & Searle (1981A&A....95..105V; 1981A&A....95..116V; 1982A&A...110...61V; 1982A&A...110...79V). (i) The majority (17 out of 23) of the galaxies show evidence for truncations, consistent with previous findings in other samples; (ii) when an HI-warp is present it starts at 1.1 truncation radii (statistically allowing all possible geometries); (iii) this supplements the rules for warps formulated by Briggs (1990ApJ...352...15B), if the Holmberg radius is replaced for edge-on systems with the truncation radius; (iv) the truncation radius and the onset of the warps coincide radially sometimes with features in the rotation curve and often with steep declines in the HI surface density. The latter is also true for less inclined systems; (v) inner disks are very flat and the onset of the warp just beyond the truncation radius is abrupt and discontinuous; (vi) in an appendix the definition and derivation of the Holmberg radius is discussed. Contrary to what is often assumed in the literature Holmberg radii are not corrected for inclination. These findings suggest that the inner flat disk and the outer warped disk are distinct components with quite different formation histories, probably involving quite different epochs. The inner disk forms initially (either in a monolithic process in a short period or hierarchically on a somewhat more protracted timescale) and the warped outer disk forms as a result of much later infall of gas with a higher angular momentum in a different orientation. The results are also consistent in this picture with an origin of the disk truncations that is related to the maximum specific angular momentum available during its formation.

Abstract Copyright:

Journal keyword(s): galaxies: general - galaxies: photometry - galaxies: structure - galaxies: spiral - publications, bibliography

Simbad objects: 41

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Number of rows : 41

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 7814 GiG 00 03 14.947 +16 08 42.82   12.0       ~ 260 0
2 NGC 300 GiG 00 54 53.4460065856 -37 41 03.182962667 8.83 8.69 8.13 7.46   ~ 1307 2
3 M 74 G 01 36 41.772 +15 47 00.46 10.52 10.00 9.46 9.16   ~ 1408 1
4 UGC 1281 LSB 01 49 31.71 +32 35 16.2   13.0       ~ 139 0
5 NGC 891 H2G 02 22 32.907 +42 20 53.95 11.08 10.81 9.93 7.86   ~ 1525 2
6 UGC 2459 G 03 00 36.786 +49 02 38.45   18       ~ 34 0
7 UGC 3137 G 04 46 16.976 +76 25 08.04   15.5       ~ 66 0
8 UGC 3909 G 07 36 58.79 +73 42 49.0   14.9       ~ 26 0
9 IC 2233 LSB 08 13 58.909 +45 44 31.74 12.87 13.41 12.63 12.80   ~ 198 1
10 NGC 2770 GiG 09 09 33.622 +33 07 24.29   12.1       ~ 233 0
11 NGC 3118 GiP 10 07 11.616 +33 01 40.35   14.4       ~ 52 0
12 UGC 5459 GiG 10 08 10.071 +53 05 00.53   13.8       ~ 73 0
13 NGC 3432 IG 10 52 31.132 +36 37 07.60   11.81 11.67 11.29   ~ 253 1
14 NGC 3510 LSB 11 03 43.356 +28 53 13.58   13.6       ~ 174 0
15 NGC 3600 GiG 11 15 51.980 +41 35 28.96   12.6       ~ 96 0
16 NGC 3726 GiG 11 33 21.1357515876 +47 01 45.260627622   11.11   10.02   ~ 321 0
17 NGC 4013 GiG 11 58 31.417 +43 56 49.28   12.4       ~ 366 1
18 NGC 4010 GiG 11 58 37.991 +47 15 40.72   13.1       ~ 123 0
19 UGC 7089 GiP 12 05 57.746 +43 08 36.08   14.40       ~ 89 1
20 NGC 4096 GiG 12 06 01.161 +47 28 42.09   11.61   10.86   ~ 219 0
21 UGC 7125 G 12 08 41.514 +36 48 08.27   14.7       ~ 59 0
22 NGC 4144 GiG 12 09 58.601 +46 27 25.85   12.17   11.50   ~ 203 0
23 NGC 4218 GiP 12 15 46.1786868267 +48 07 52.630641133   13.2       ~ 79 0
24 NGC 4217 GiG 12 15 50.900 +47 05 30.44   12.4       ~ 250 2
25 NGC 4244 GiG 12 17 29.659 +37 48 25.60   10.71   9.99   ~ 513 1
26 UGC 7321 EmG 12 17 34.021 +22 32 23.35   14.07   13.21   ~ 226 0
27 NGC 4359 GiG 12 24 11.060 +31 31 17.78   13.9       ~ 92 0
28 NGC 4565 LIN 12 36 20.804 +25 59 14.61   13.61 12.43     ~ 873 0
29 UGC 7774 LSB 12 36 22.716 +40 00 18.72   15.2       ~ 76 0
30 NGC 4631 GiP 12 42 08.009 +32 32 29.44   9.78 9.19 9.10   ~ 970 2
31 UGC 8246 GiP 13 10 04.501 +34 10 51.35   15.1       ~ 63 0
32 NGC 5023 EmG 13 12 11.799 +44 02 16.88   13.2       ~ 218 0
33 M 63 LIN 13 15 49.2738527699 +42 01 45.726078017   9.34 8.59 8.35   ~ 1058 2
34 NGC 5107 GiP 13 21 25.269 +38 32 10.96   13.7       ~ 78 0
35 NGC 5229 LSB 13 34 02.831 +47 54 55.68   14.6       ~ 112 0
36 M 83 SBG 13 37 00.919 -29 51 56.74 8.85 8.11 7.52 7.21   ~ 2232 2
37 NGC 5297 GiP 13 46 23.694 +43 52 19.34   12.3       ~ 141 0
38 NGC 5301 GiG 13 46 24.609 +46 06 26.66   13.0       ~ 110 0
39 UGC 9242 GiG 14 25 21.152 +39 32 21.52   14.8       ~ 83 0
40 NGC 5746 GiP 14 44 56.005 +01 57 17.06   12.3       ~ 324 0
41 NGC 5906 GiG 15 15 53.687 +56 19 43.86   11.4       ~ 680 1

    Equat.    Gal    SGal    Ecl

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2020.08.04-05:29:20

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