2006ApJS..162..329B

Query : 2006ApJS..162..329B

2006ApJS..162..329B - Astrophys. J., Suppl. Ser., 162, 329-345 (2006/February-0)

Understanding radio-selected thermal sources in M 33: ultraviolet, optical, near-infrared, Spitzer mid-infrared, and radio observations.

BUCKALEW B.A., KOBULNICKY H.A., DARNEL J.M., POLOMSKI E., GEHRZ R.D., HUMPHREYS R.M., WOODWARD C.E., HINZ J.L., ENGELBRACHT C.W., GORDON K.D., MISSELT K., PEREZ-GONZALEZ P.G., RIEKE G.H., WILLNER S.P., ASHBY M.L., BARMBY P., PAHRE M.A., ROELLIG T.L., DEVEREUX N., LOON J.T. and BRANDL B.

Abstract (from CDS):

We present ultraviolet, optical, near-infrared, Spitzer mid-infrared, and radio images of 14 radio-selected objects in M33. These objects are thought to represent the youngest phase of star cluster formation. We have detected the majority of cluster candidates in M33 at all wavelengths. From the near-IR images, we derived ages 2-10 Myr, KS-band extinctions (AKS) of 0-1 mag, and stellar masses of 103-104 M☉. We have generated spectral energy distributions (SEDs) of each cluster from 0.1 to 160 µm. From these SEDs, we have modeled the dust emission around these star clusters to determine the dust masses (1-103 M☉) and temperatures (40-90 K) of the clusters' local interstellar medium. Extinctions derived from the JHKS, Hα, and UV images are similar to within a factor of 2 or 3. These results suggest that 11 of the 14 radio-selected objects are optically visible young star clusters with a surrounding H II region, that 2 are background objects, possibly active galactic nuclei (AGNs), and that 1 is a Wolf-Rayet star with a surrounding H II region.

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Journal keyword(s): ISM: Dust, Extinction - Galaxies: Individual: Messier Number: M33 - Galaxies: Star Clusters - Infrared: ISM - ISM: Structure

Nomenclature: Table 2: [BKD2006] NNa N=23, (Nos 1-14).

Simbad objects: 18

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Number of rows : 18
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 SNR B013022+30233 SNR 01 33 11.80 +30 38 41.5   18.8 18.80     ~ 41 1
2 2MASS J01331580+3056445 WR* 01 33 15.7771334448 +30 56 44.825037756 15.615 16.686 16.785 16.788 16.835 WN4.5+O 8 0
3 IC 132 HII 01 33 15.8 +30 56 45 15.08 14.87 14.82 15.24 15.43 ~ 49 1
4 BCLMP 633 HII 01 33 39.2 +30 52 08     14.9     ~ 3 0
5 BCLMP 35 HII 01 33 39.46 +30 38 07.3     12.5     ~ 6 0
6 BCLMP 36 HII 01 33 39.7 +30 38 09     13.5     ~ 4 0
7 BCLMP 40 HII 01 33 43.42 +30 39 05.8     16.1     ~ 6 0
8 [GDK99] 91 HII 01 33 48.2 +30 39 18           ~ 3 1
9 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
10 BCLMP 71 HII 01 33 52.0 +30 40 07     14.5     ~ 3 0
11 VGHC 2-77 HII 01 34 00.19 +30 40 50.0     15.4     ~ 18 0
12 BCLMP 87 HII 01 34 02.32 +30 38 40.2     14.4     ~ 12 0
13 BCLMP 77 HII 01 34 06.71 +30 41 48.9     12.0     ~ 7 0
14 BCLMP 95 HII 01 34 10.9 +30 36 18     14.5     ~ 15 0
15 BCLMP 714 HII 01 34 13.84 +30 34 50.8     14.5     ~ 6 0
16 BCLMP 712 HII 01 34 19.31 +30 33 47.4           ~ 5 0
17 BCLMP 749 HII 01 34 38.8 +30 44 03     13.3     ~ 7 0
18 BCLMP 750 HII 01 34 40.69 +30 43 31.0     15.8     ~ 5 0

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