2017ApJ...849..149S


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.21CET09:49:54

2017ApJ...849..149S - Astrophys. J., 849, 149-149 (2017/November-2)

The VMC Survey. XXVII. Young stellar structures in the LMC's bar star-forming complex.

SUN N.-C., DE GRIJS R., SUBRAMANIAN S., BEKKI K., BELL C.P.M., CIONI M.-R.L., IVANOV V.D., MARCONI M., OLIVEIRA J.M., PIATTI A.E., RIPEPI V., RUBELE S., TATTON B.L. and VAN LOON J.T.

Abstract (from CDS):

Star formation is a hierarchical process, forming young stellar structures of star clusters, associations, and complexes over a wide range of scales. The star-forming complex in the bar region of the Large Magellanic Cloud is investigated with upper main-sequence stars observed by the VISTA Survey of the Magellanic Clouds. The upper main-sequence stars exhibit highly nonuniform distributions. Young stellar structures inside the complex are identified from the stellar density map as density enhancements of different significance levels. We find that these structures are hierarchically organized such that larger, lower-density structures contain one or several smaller, higher-density ones. They follow power-law size and mass distributions, as well as a lognormal surface density distribution. All these results support a scenario of hierarchical star formation regulated by turbulence. The temporal evolution of young stellar structures is explored by using subsamples of upper main-sequence stars with different magnitude and age ranges. While the youngest subsample, with a median age of log(τ/yr) = 7.2, contains the most substructure, progressively older ones are less and less substructured. The oldest subsample, with a median age of log(τ/yr) = 8.0, is almost indistinguishable from a uniform distribution on spatial scales of 30-300 pc, suggesting that the young stellar structures are completely dispersed on a timescale of ∼100 Myr. These results are consistent with the characteristics of the 30 Doradus complex and the entire Large Magellanic Cloud, suggesting no significant environmental effects. We further point out that the fractal dimension may be method dependent for stellar samples with significant age spreads.

Abstract Copyright: © 2017. The American Astronomical Society.

Journal keyword(s): infrared: stars - Magellanic Clouds - stars: formation - stars: formation

VizieR on-line data: <Available at CDS (J/ApJ/849/149): table1.dat>

Nomenclature: Table 1: [SDS2017] NNN (Nos 1-123).

Simbad objects: 31

goto Full paper

goto View the reference in ADS

Number of rows : 31

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 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9230 1
2 NGC 346 Cl* 00 59 05.090 -72 10 33.24           ~ 443 0
3 M 33 GiG 01 33 50.904 +30 39 35.79 6.17 6.27 5.72     ~ 5072 1
4 M 74 G 01 36 41.772 +15 47 00.46 10.52 10.00 9.46 9.16   ~ 1365 1
5 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5498 1
6 NGC 1566 Sy1 04 20 00.4020009055 -54 56 16.578104141 10.29 10.19 9.73 9.21 10.1 ~ 704 2
7 LH 27 As* 05 07 08 -69 08.1           ~ 8 0
8 LH 30 As* 05 08 14 -69 13.4           ~ 9 0
9 NGC 1850 Cl* 05 08 50.190 -68 45 35.65   8.84 8.96     ~ 229 1
10 LHA 120-N 103A EmO 05 09 24.0 -68 45 44           ~ 35 1
11 NGC 1858 Cl* 05 09 56.09 -68 54 06.2   9.76 9.88     ~ 76 3
12 LHA 120-N 105 EmO 05 09 57.1 -68 53 31           ~ 37 0
13 LH 33 As* 05 10 46 -69 09.6           ~ 9 0
14 LH 35 As* 05 13.3 -69 22           ~ 14 0
15 LHA 120-N 113 HII 05 13 21.7 -69 21 33           ~ 95 1
16 LH 39 As* 05 13 49.410 -69 32 42.76   10.89 10.86     ~ 23 0
17 LHA 120-N 117 EmO 05 17 05.16 -69 33 41.4           ~ 8 0
18 LHA 120-N 119 HII 05 18 39.2 -69 13 22           ~ 50 1
19 NGC 1910 As* 05 18 42.50 -69 14 12.1     9.65     ~ 47 1
20 LH 42 As* 05 18 58.0 -69 39 30           ~ 23 1
21 NGC 1918 SNR 05 19 04.50 -69 38 56.0           ~ 93 0
22 NAME LMC Bar ? 05 22 08 -69 23.5           ~ 254 0
23 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14544 1
24 RMC 136 Cl* 05 38 42.396 -69 06 03.36   9.63 9.50     ~ 1698 2
25 LHA 120-N 158 HII 05 39 11.220 -69 30 13.65           ~ 80 0
26 LHA 120-N 159 HII 05 39 46.650 -69 45 39.94           ~ 248 2
27 LHA 120-N 160 EmO 05 39 47.9 -69 37 08           ~ 109 1
28 NGC 3310 AGN 10 38 45.857 +53 30 11.89   12.45 12.15     ~ 724 1
29 M 51 GiP 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 3723 4
30 NGC 6503 LIN 17 49 26.4206717057 +70 08 39.587370580 11.56 10.95 10.28 9.92   ~ 463 1
31 NGC 6745 G 19 01 41.192 +40 44 37.34   13.3       ~ 68 1

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2017ApJ...849..149S and select 'bookmark this link' or equivalent in the popup menu


2020.02.21-09:49:54

© Université de Strasbourg/CNRS

    • Contact