2002A&A...392..807P


Query : 2002A&A...392..807P

2002A&A...392..807P - Astronomy and Astrophysics, volume 392, 807-816 (2002/9-4)

Outer edges of face-on spiral galaxies. Deep optical imaging of NGC 5923, UGC 9837 and NGC 5434.

POHLEN M., DETTMAR R.-J., LUETTICKE R. and ARONICA G.

Abstract (from CDS):

We present deep optical imaging of three face-on disk galaxies together with a detailed description of the reduction and calibration methods used, in order to measure the intrinsic shape of their outer stellar edges. Whereas it is now well accepted that disks of spiral galaxies are not infinite exponential beyond galactocentric distances of about 3-5 radial scalelengths, the genuine structure of the truncation region is not yet well known. Our data quantitatively establish a smooth truncation behaviour of the radial surface brightness profiles and is best described by a two-slope model, characterised by an inner and outer exponential scalelength separated at a relatively well defined break radius. This result disagrees with the frequently assumed sharply truncated nature of the radial surface brightness profiles and implies the presence of stars and even star-formation beyond the break radius. In addition, we do not find a strong influence of a nearby companion on the ratio of the break radius to the radial scalelength. Our results denote new observational constraints for the search of the physical explanation for these smooth disk truncations.

Abstract Copyright:

Journal keyword(s): galaxies: spiral - galaxies: fundamental parameters - galaxies: structure - galaxies: individual: NGC 5923, UGC 9837, NGC 5434

Simbad objects: 21

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Number of rows : 21
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 M 74 G 01 36 41.772 +15 47 00.46 10.52 10.00 9.46 9.16   ~ 1480 1
2 NGC 2681 LIN 08 53 32.739 +51 18 49.35 11.40 11.09 10.29     ~ 303 1
3 NGC 3198 EmG 10 19 54.990 +45 32 58.88 10.83 10.87 10.33     ~ 838 1
4 NGC 3938 GiG 11 52 49.453 +44 07 14.63 10.80 10.90 10.38     ~ 485 1
5 NGC 4123 AGN 12 08 11.082 +02 52 41.91   13.1       ~ 316 1
6 NGC 4203 LIN 12 15 05.0543630359 +33 11 50.401356393   12.98 11.99     ~ 463 2
7 M 106 Sy2 12 18 57.620 +47 18 13.39   9.14 8.41 8.11   ~ 2187 3
8 NGC 4565 LIN 12 36 20.804 +25 59 14.61   13.61 12.43     ~ 896 0
9 NGC 5005 GiP 13 10 56.312 +37 03 32.19   14.67 13.67     ~ 511 2
10 NGC 5033 Sy1 13 13 27.535 +36 35 37.14   11.01 12.03 9.73   ~ 811 3
11 M 63 LIN 13 15 49.2738527699 +42 01 45.726078017   9.34 8.59 8.35   ~ 1104 2
12 NGC 5390 LIN 13 55 40.023 +40 27 42.37   12.81 11.93 10.04   ~ 327 1
13 NGC 5383 GiG 13 57 04.975 +41 50 46.60   12.5   10.95   ~ 318 0
14 UGC 8877 G 13 57 06.875 +41 47 37.64   16.5   14.21   ~ 31 0
15 NGC 5434 GiG 14 03 23.141 +09 26 53.16   14.3       ~ 56 0
16 UGC 8967 rG 14 03 27.059 +09 28 01.16   14.7       ~ 67 0
17 NGC 5906 GiG 15 15 53.687 +56 19 43.86   11.4       ~ 704 1
18 NGC 5923 LIN 15 21 14.256 +41 43 33.41   14.7       ~ 33 0
19 UGC 9837 LSB 15 23 51.735 +58 03 11.23   14.6       ~ 64 0
20 NGC 6340 GiP 17 10 24.961 +72 18 15.69   11.87 11.01     ~ 181 1
21 IC 5249 G 22 47 06.262 -64 49 55.42   14.35   13.36 13.7 ~ 84 0

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2021.08.05-21:02:46

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