2016A&A...594A..34R


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.05CET11:39:25

2016A&A...594A..34R - Astronomy and Astrophysics, volume 594A, 34-34 (2016/10-1)

Detailed photometric analysis of young star groups in the galaxy NGC 300.

RODRIGUEZ M.J., BAUME G. and FEINSTEIN C.

Abstract (from CDS):

Aims. The purpose of this work is to understand the global characteristics of the stellar populations in NGC 300. In particular, we focused our attention on searching young star groups and study their hierarchical organization. The proximity and orientation of this Sculptor Group galaxy make it an ideal candidate for this study.
Methods. The research was conducted using archival point spread function (PSF) fitting photometry measured from images in multiple bands obtained with the Advanced Camera for Surveys of the Hubble Space Telescope (ACS/HST). Using the path linkage criterion (PLC), we cataloged young star groups and analyzed them from the observation of individual stars in the galaxy NGC 300. We also built stellar density maps from the bluest stars and applied the SExtractor code to identify overdensities. This method provided an additional tool for the detection of young stellar structures. By plotting isocontours over the density maps and comparing the two methods, we could infer and delineate the hierarchical structure of the blue population in the galaxy. For each region of a detected young star group, we estimated the size and derived the radial surface density profiles for stellar populations of different color (blue and red). A statistical decontamination of field stars was performed for each region. In this way it was possible to build the color-magnitude diagrams (CMD) and compare them with theoretical evolutionary models. We also constrained the present-day mass function (PDMF) per group by estimating a value for its slope.
Results. The blue population distribution in NGC 300 clearly follows the spiral arms of the galaxy, showing a hierarchical behavior in which the larger and loosely distributed structures split into more compact and denser ones over several density levels. We created a catalog of 1147 young star groups in six fields of the galaxy NGC 300, in which we present their fundamental characteristics. The mean and the mode radius values obtained from the size distribution are both 25pc, in agreement with the value for the Local Group and nearby galaxies. Additionally, we found an average PDMF slope that is compatible with the Salpeter value.

Abstract Copyright: © ESO, 2016

Journal keyword(s): stars: luminosity function, mass function - galaxies: individual: NGC 300 - galaxies: star clusters: general - galaxies: star formation

VizieR on-line data: <Available at CDS (J/A+A/594/A34): table2.dat>

Nomenclature: Table 2: [RBF2016] NGC 300 NNNN N=1147 among (Nos 1001-6030).

Simbad objects: 23

goto Full paper

goto View the reference 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 - 2021
#notes
1 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11216 1
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9710 1
3 [PGF2001] AS 2 As* 00 54 17.4 -37 35 05           ~ 3 0
4 NGC 300 GiG 00 54 53.4460065856 -37 41 03.182962667 8.83 8.69 8.13 7.46   ~ 1350 2
5 NAME Scl Group GrG 01 00 06 -33 44.2           ~ 467 0
6 MCG-01-03-065 LSB 01 01 33.987 -07 35 18.75 12.57 12.70 12.17 12.8 12.5 ~ 71 1
7 IC 1613 GiC 01 04 54.2 +02 08 00   10.42 10.01 9.77   ~ 1122 2
8 M 33 GiG 01 33 50.904 +30 39 35.79 6.17 6.27 5.72     ~ 5252 1
9 NGC 925 H2G 02 27 16.913 +33 34 43.97   10.69 10.12 9.55   ~ 712 1
10 NGC 1058 Sy2 02 43 30.0247243235 +37 20 28.807743477   12.29 11.75 10.85   ~ 444 0
11 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15214 1
12 NGC 2090 GiG 05 47 01.8563832745 -34 15 01.657223780 12.17 11.70 11.20 10.43 11.0 ~ 162 1
13 NGC 2541 GiG 08 14 40.1104536348 +49 03 42.058472450 12.03 12.26 11.80     ~ 283 1
14 M 95 GiP 10 43 57.733 +11 42 13.00 10.71 10.51 9.73 9.48   ~ 965 2
15 NGC 3507 GiP 11 03 25.3605473839 +18 08 07.606955348   11.4       ~ 158 0
16 NGC 3621 AGN 11 18 16.300 -32 48 45.36 10.10 9.44 9.56 8.07 10.1 ~ 499 3
17 NGC 4394 GiP 12 25 55.6370604801 +18 12 50.115665445   11.9       ~ 337 0
18 M 91 LIN 12 35 26.430 +14 29 46.75   14.63 13.57     ~ 534 0
19 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 2604 2
20 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1453 0
21 NGC 7217 LIN 22 07 52.368 +31 21 33.32   12.94 11.92     ~ 468 0
22 UGC 12732 GiP 23 40 39.96 +26 14 09.8   14.5       ~ 121 0
23 NAME Local Group GrG ~ ~           ~ 7188 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2016A&A...594A..34R and select 'bookmark this link' or equivalent in the popup menu


2021.03.05-11:39:25

© Université de Strasbourg/CNRS

    • Contact