2009ApJ...700..506S


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.17CEST06:07:46

2009ApJ...700..506S - Astrophys. J., 700, 506-522 (2009/July-3)

Spitzer observations of the H II region NGC 2467: an analysis of triggered star formation.

SNIDER K.D., HESTER J.J., DESCH S.J., HEALY K.R. and BALLY J.

Abstract (from CDS):

We present new Spitzer Space Telescope observations of the region NGC 2467, and use these observations to determine how the environment of an H II region affects the process of star formation. Our observations comprise IRAC (3.6, 4.5, 5.8, and 8.0 µm) and MIPS (24 µm) maps of the region, covering approximately 400 arcmin2. The images show a region of ionized gas pushing out into the surrounding molecular cloud, powered by an O6V star and two clusters of massive stars in the region. We have identified as candidate young stellar objects (YSOs) 45 sources in NGC 2467 with infrared excesses in at least two mid-infrared colors. We have constructed color-color diagrams of these sources and have quantified their spatial distribution within the region. We find that the YSOs are not randomly distributed in NGC 2467; rather, over 75% of the sources are distributed at the edge of the H II region, along ionization fronts driven by the nearby massive stars. The high fraction of YSOs in NGC 2467 that are found in proximity to gas that has been compressed by ionization fronts supports the hypothesis that a significant fraction of the star formation in NGC 2467 is triggered by the massive stars and the expansion of the H II region. At the current rate of star formation, we estimate at least 25%-50% of the total population of YSOs formed by this process.

Abstract Copyright:

Journal keyword(s): ISM: individual: NGC 2467 - stars: formation - stars: pre-main sequence

Nomenclature: Tables 1, 3-4: [SHD2009] NN (Nos 1-45).

Simbad objects: 67

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Number of rows : 67

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9088 1
2 NGC 346 Cl* 00 59 05.090 -72 10 33.24           ~ 441 0
3 W 3 MoC 02 27 04.10 +61 52 27.1           ~ 942 3
4 NAME Heart Nebula HII 02 32.7 +61 27           ~ 271 1
5 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14323 1
6 NAME Trapezium Cluster As* 05 35 16.5 -05 23 14           ~ 1432 1
7 NAME Ori I As* 05 38 -02.8           ~ 543 0
8 NAME Rosette Nebula HII 06 31 40 +04 57.8           ~ 428 1
9 NGC 2244 OpC 06 31 55 +04 56.5   5.26 4.8     ~ 553 4
10 2MASS J07521633-2623143 Y*? 07 52 16.3247871290 -26 23 14.218374786           ~ 1 0
11 2MASS J07521781-2625210 Y*? 07 52 17.8116571979 -26 25 20.826354854           ~ 2 0
12 NGC 2467 HII 07 52 18 -26 25.7           ~ 172 1
13 [SHD2009] 16 Y*? 07 52 20.15 -26 27 54.1           ~ 1 0
14 HD 64315 Em* 07 52 20.2841727949 -26 25 46.683038109 8.76 9.49 9.24 9.63 8.86 O5.5Vz+O7V 99 1
15 2MASS J07522131-2627103 Y*? 07 52 21.3154108023 -26 27 10.100653557           ~ 2 0
16 2MASS J07522326-2626505 Y*? 07 52 23.2651714133 -26 26 50.345578931           ~ 2 0
17 2MASS J07522402-2625290 Y*? 07 52 24.0198052433 -26 25 28.889113341           ~ 2 0
18 2MASS J07522751-2627212 Y*? 07 52 27.515 -26 27 21.28           ~ 2 0
19 2MASS J07523164-2622072 Y*? 07 52 31.6423242585 -26 22 07.163783034           ~ 2 0
20 2MASS J07523202-2622375 Y*? 07 52 32.0181397073 -26 22 37.357047321           ~ 2 0
21 2MASS J07523213-2622304 Y*? 07 52 32.1331031838 -26 22 30.248926433           ~ 2 0
22 2MASS J07523349-2626483 Y*? 07 52 33.4924724234 -26 26 48.151409451           ~ 2 0
23 2MASS J07523444-2626347 Y*? 07 52 34.446 -26 26 34.71           ~ 1 0
24 2MASS J07523444-2626443 Y*? 07 52 34.450 -26 26 44.33           ~ 1 0
25 2MASS J07523554-2626347 Y*? 07 52 35.5365016831 -26 26 34.531844936           ~ 2 0
26 2MASS J07523554-2625083 Y*? 07 52 35.5494252493 -26 25 08.114535384           ~ 2 0
27 2MASS J07523555-2625445 Y*? 07 52 35.5498250905 -26 25 44.409818622           ~ 2 0
28 2MASS J07523586-2621584 Y*? 07 52 35.8596405458 -26 21 58.256757740           ~ 1 0
29 2MASS J07523621-2625478 Y*? 07 52 36.2178670879 -26 25 47.736382083           ~ 2 0
30 2MASS J07523639-2625563 Y*? 07 52 36.390 -26 25 56.37           ~ 2 0
31 2MASS J07523645-2626115 Y*? 07 52 36.4407555913 -26 26 11.360547450           ~ 2 0
32 2MASS J07523678-2623232 Y*? 07 52 36.786 -26 23 23.20           ~ 1 0
33 [SHD2009] 4 Y*? 07 52 38.00 -26 21 31.9           ~ 1 0
34 Cl* Haffner 18 LSS 32 * 07 52 38.5671900317 -26 23 09.878016592   15.071 14.413     B1V 8 0
35 C 0750-262 OpC 07 52 39 -26 22.8   10.09 9.3     ~ 38 1
36 Cl* Haffner 18 MCB 43 * 07 52 39.1365409573 -26 23 22.384226071 11.84 12.42 12.12 11.92   O8V 17 0
37 2MASS J07524000-2625329 Y*? 07 52 39.9971204406 -26 25 32.819259851           ~ 2 0
38 [FM74] 3057 * 07 52 40.960 -26 23 48.33   15.23 14.67     B6V 7 0
39 2MASS J07524222-2622509 Y*? 07 52 42.220 -26 22 50.94           ~ 2 0
40 2MASS J07524281-2625458 Y*? 07 52 42.8069930969 -26 25 45.766322460           ~ 2 0
41 WRAY 15-101 Em* 07 52 42.8885867383 -26 24 12.783568517 11.39 12.11 11.92 11.97   OB: 22 0
42 Cl* Haffner 19 FM 4040 * 07 52 43.1606971933 -26 17 15.781156157   17.264 16.264     ~ 5 0
43 Cl* Haffner 18 LSS 11 * 07 52 43.673 -26 24 20.84   15.871 15.373     ~ 2 0
44 [SHD2009] 7 Y*? 07 52 44.41 -26 22 59.3           ~ 1 0
45 NGC 2467 39 * 07 52 44.5254037093 -26 17 26.817796092 11.82 12.54 12.40 12.19 12.05 ~ 16 0
46 [SHD2009] 9 Y*? 07 52 45.000 -26 24 27.83           ~ 1 0
47 2MASS J07524524-2624222 Y*? 07 52 45.250 -26 24 22.28           ~ 1 0
48 [SHD2009] 10 Y*? 07 52 46.68 -26 23 59.8           ~ 1 0
49 C 0750-261 OpC 07 52 47 -26 17.0   9.60 9.4     ~ 45 0
50 Cl* Haffner 19 MCD 63 * 07 52 47.1891968306 -26 15 58.409877714   14.87 14.43     ~ 2 0
51 2MASS J07524787-2622230 Y*? 07 52 47.874 -26 22 23.02           ~ 2 0
52 Cl* Haffner 19 MC 48 * 07 52 49.7207241345 -26 16 33.462864832   14.96 13.93     ~ 6 0
53 2MASS J07525025-2626404 Y*? 07 52 50.2576654379 -26 26 40.316983442           ~ 2 0
54 Cl* Haffner 19 MCD 140 * 07 52 50.320 -26 18 08.81   19.69 18.42     ~ 2 0
55 2MASS J07525160-2625425 Y*? 07 52 51.603 -26 25 42.57           ~ 1 0
56 Cl* Haffner 19 MCD 24b * 07 52 52.78 -26 15 17.6   21.87 19.11     ~ 2 0
57 2MASS J07525586-2622393 Y*? 07 52 55.8647807036 -26 22 39.370667237           ~ 2 0
58 2MASS J07530160-2619593 Y*? 07 53 01.6065298718 -26 19 59.473780244           ~ 1 0
59 GUM 29 HII 10 24 14.6 -57 46 58           ~ 188 0
60 NAME Lower Centaurus Crux As* 12 19 -57.1           ~ 334 1
61 NAME Upper Centaurus Lupus As* 15 24 -41.9           ~ 342 1
62 NAME Upper Sco Association As* 16 12 -23.4           ~ 959 1
63 NAME ASSOC II SCO As* 16 15 -24.2           ~ 1078 1
64 M 20 OpC 18 02 42 -22 58.3           ~ 387 1
65 M 16 OpC 18 18 48 -13 48.4   6.58 6.0     ~ 920 2
66 NAME SFO 37 IR Stellar Group Cl* 21 40 29 +56 36.0           ~ 2 0
67 NAME I Lac As* 22 41 +38.5           ~ 142 0

    Equat.    Gal    SGal    Ecl

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2019.10.17-06:07:46

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