2016A&A...585A..49Z


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.06CEST23:20:15

2016A&A...585A..49Z - Astronomy and Astrophysics, volume 585A, 49-49 (2016/1-1)

The VISTA Carina Nebula Survey. II. Spatial distribution of the infrared-excess-selected young stellar population.

ZEIDLER P., PREIBISCH T., RATZKA T., ROCCATAGLIATA V. and PETR-GOTZENS M.G.

Abstract (from CDS):

We performed a deep wide-field (6.76 sq. deg) near-infrared survey with the VISTA telescope that covers the entire extent of the Carina nebula complex (CNC). The point-source catalog created from these data contains around four million individual objects down to masses of 0.1M. We present a statistical study of the large-scale spatial distribution and an investigation of the clustering properties of infrared-excesses objects, which are used to trace disk-bearing young stellar objects (YSOs). A selection based on a near-infrared (J-H) versus (H-Ks) color-color diagram shows an almost uniform distribution over the entire observed area. We interpret this as a result of the very high degree of background contamination that arises from the Carina Nebula's location close to the Galactic plane. Complementing the VISTA near-infrared catalog with Spitzer IRAC mid-infrared photometry improves the situation of the background contamination considerably. We find that a (J-H) versus (Ks-[4.5]) color-color diagram is well suited to tracing the population of YSO-candidates (cYSOs) by their infrared excess. We identify 8781 sources with strong infrared excess, which we consider as cYSOs. This sample is used to investigate the spatial distribution of the cYSOs with a nearest-neighbor analysis. The surface density distribution of cYSOs agrees well with the shape of the clouds as seen in our Herschel far-infrared survey. The strong decline in the surface density of excess sources outside the area of the clouds supports the hypothesis that our excess-selected sample consists predominantly of cYSOs with a low level of background contamination. This analysis allows us to identify 14 groups of cYSOs outside the central area.Our results suggest that the total population of cYSOs in the CNC comprises about 164000 objects, with a substantial fraction (∼35%) located in the northern, still not well studied parts. Our cluster analysis suggests that roughly half of the cYSOs constitute a non-clustered, dispersed population.

Abstract Copyright:

Journal keyword(s): stars: formation - stars: low-mass - ISM: individual objects: NGC 3372 - stars: pre-main sequence - infrared: stars

VizieR on-line data: <Available at CDS (J/A+A/585/A49): catalog.dat>

Nomenclature: Fig. 8, Table 2: [ZPR2016] NN (Nos 1-14), [ZPR2016] A (Nos A-B).

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

Simbad objects: 25

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Number of rows : 25

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 [ZPR2016] 9 Cl* 10 35 28.4 -58 57 36           ~ 1 0
2 [ZPR2016] 13 Cl* 10 36 57.8 -58 25 31           ~ 1 0
3 MSX6C G286.2566-00.3236 HII 10 37 00.6 -58 46 24           ~ 2 0
4 NGC 3324 OpC 10 37 20 -58 38.5   6.91 6.7     ~ 100 1
5 [ZPR2016] A Cl* 10 37 36.5 -58 27 27           ~ 1 0
6 IC 2599 HII 10 37.7 -58 39           ~ 34 2
7 [ZPR2016] 14 Cl* 10 37 49.5 -58 15 33           ~ 1 0
8 [ZPR2016] B Cl* 10 38 08.7 -58 56 03           ~ 1 0
9 [ZPR2016] 11 Cl* 10 38 32.2 -58 43 55           ~ 1 0
10 [ZPR2016] 5 Cl* 10 39 24.7 -59 07 21           ~ 1 0
11 [ZPR2016] 10 Cl* 10 39 45.9 -58 41 43           ~ 1 0
12 [ZPR2016] 4 Cl* 10 40 09.9 -59 19 03           ~ 1 0
13 [ZPR2016] 8 Cl* 10 40 57.1 -58 50 50           ~ 1 0
14 Cl Trumpler 14 OpC 10 43 56 -59 33.0   5.70 5.5     ~ 425 0
15 NGC 3372 HII 10 44 19.0 -59 53 21           ~ 888 2
16 Cl Trumpler 15 OpC 10 44 43 -59 22.0   7.41 7.0     ~ 175 0
17 * eta Car Em* 10 45 03.5455050 -59 41 03.951060 6.37 7.034 6.21 4.90 4.41 OBepec 2198 0
18 Cl Trumpler 16 OpC 10 45 10 -59 43.0   5.35 5.0     ~ 424 0
19 [ZPR2016] 7 Cl* 10 45 37.0 -58 55 05           ~ 1 0
20 NAME Treasure Chest BNe 10 45 53.0 -59 57 02           ~ 26 2
21 [ZPR2016] 6 Cl* 10 46 17.8 -59 14 05           ~ 1 0
22 [SPW2010] O Cl* 10 47 41.0 -60 26 00           ~ 2 0
23 [ZPR2016] 3 Cl* 10 48 18.4 -59 53 33           ~ 1 0
24 [ZPR2016] 2 Cl* 10 48 30.8 -59 58 58           ~ 1 0
25 NAME Serpens Cloud SFR 18 29 49 +01 14.8           ~ 912 2

    Equat.    Gal    SGal    Ecl

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2020.07.06-23:20:15

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