2005A&A...440..783P

Query : 2005A&A...440..783P

2005A&A...440..783P - Astronomy and Astrophysics, volume 440, 783-789 (2005/9-3)

A survey for OB associations in the Sculptor Group spiral galaxy NGC 7793.

PIETRZYNSKI G., ULACZYK K., GIEREN W., BRESOLIN F. and KUDRITZKI R.P.

Abstract (from CDS):

We report on the results from application of an objective algorithm (PLC) to find OB associations, to B and V images of the Sculptor spiral galaxy NGC 7793, which were obtained with the ESO VLT and FORS instrument and basically cover the entire spatial extent of the galaxy. We detected 148 associations. Statistical tests show that less than 6 of these detections are caused by randomly concentrated blue stars. In the size distribution, a sharp peak is observed at a value of about 35 microradians, which corresponds to a linear diameter of 135pc, assuming a distance of 3.91Mpc to the galaxy. We also find 25 much larger objects. A second application of the PLC technique shows that 20 of them are stellar complexes consisting of multiple sub-associations with typical sizes on the order of 130 pc. A comparison of the size distribution of the detected OB associations in NGC 7793 with observed distributions in other galaxies suggests that the conditions in two Sculptor Group galaxies (NGC 300 and NGC 7793) favour the formation of large associations. We provide a catalog giving coordinates and physical parameters for all the associations and stellar complexes we have found in our survey.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: open clusters and associations - galaxies: individual: NGC 7793

VizieR on-line data: <Available at CDS (J/A+A/440/783): table1.dat>

Nomenclature: Table 1: [PUG2005] AS NNN (Nos 1-148). Table 2: [PUG2005] AS NNNa N=49.

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 23

goto Full paper

goto View the references in ADS

Number of rows : 23
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 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 12645 1
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 11146 1
3 NGC 300 GiG 00 54 53.4465638304 -37 41 03.168402396 8.83 8.69 8.13 7.46   ~ 1502 2
4 NAME Scl Group GrG 01 00 06 -33 44.2           ~ 509 0
5 IC 1613 GiC 01 04 48.4071 +02 07 10.185   10.42 10.01 9.77   ~ 1235 2
6 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 5838 1
7 NGC 925 H2G 02 27 16.913 +33 34 43.97   10.69 10.12 9.55   ~ 783 1
8 NGC 1058 Sy2 02 43 30.0264850248 +37 20 28.782851784   12.29 11.75 10.85   ~ 466 0
9 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17432 0
10 NGC 2090 GiG 05 47 01.8557074752 -34 15 01.679264784 12.17 11.70 11.20 10.43 11.0 ~ 186 1
11 NGC 2541 GiG 08 14 40.1160678912 +49 03 42.021679932 12.03 12.26 11.80     ~ 313 1
12 M 95 GiP 10 43 57.7313485800 +11 42 13.301191332 10.71 10.51 9.73 9.48   ~ 1121 2
13 UGC 5889 GiP 10 47 22.4012897592 +14 04 16.697296020 14.17 14.31 13.61 13.51   ~ 141 1
14 NGC 3507 GiP 11 03 25.3619733360 +18 08 07.607343732   11.4       ~ 184 0
15 NGC 3621 Sy2 11 18 16.300 -32 48 45.36 10.10 9.44 9.56 8.07 10.1 ~ 590 3
16 NGC 4394 GiP 12 25 55.6366312872 +18 12 50.110707636   11.9       ~ 362 0
17 M 91 LIN 12 35 26.4446761320 +14 29 46.760333748   14.63 13.57     ~ 593 0
18 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 2914 2
19 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1562 0
20 NGC 7217 LIN 22 07 52.3984675584 +31 21 33.632293572   12.94 11.92     ~ 494 0
21 UGC 12732 GiP 23 40 39.86 +26 14 11.1   14.5       ~ 140 0
22 NGC 7793 GiG 23 57 49.7540045856 -32 35 27.701550744 10.26 9.74 9.28 9.06 9.7 ~ 1107 2
23 NAME Local Group GrG ~ ~           ~ 8389 0

To bookmark this query, right click on this link: simbad:objects in 2005A&A...440..783P and select 'bookmark this link' or equivalent in the popup menu