2010A&A...518L..73S


Query : 2010A&A...518L..73S

2010A&A...518L..73S - Astronomy and Astrophysics, volume 518, L73-73 (2010/7-2)

The youngest massive protostars in the Large Magellanic Cloud.

SEWILO M., INDEBETOUW R., CARLSON L.R., WHITNEY B.A., CHEN C.-H.R., MEIXNER M., ROBITAILLE T., VAN LOON J.T., OLIVEIRA J.M., CHURCHWELL E., SIMON J.D., HONY S., PANUZZO P., SAUVAGE M., ROMAN-DUVAL J., GORDON K., ENGELBRACHT C., MISSELT K., OKUMURA K., BECK T., HORA J. and WOODS P.M.

Abstract (from CDS):

We demonstrate the unique capabilities of Herschel to study very young luminous extragalactic young stellar objects (YSOs) by analyzing a central strip of the Large Magellanic Cloud obtained through the HERITAGE science demonstration program. We combine PACS 100 and 160, and SPIRE 250, 350, and 500µm photometry with 2MASS (1.25-2.17µm) and Spitzer IRAC and MIPS (3.6-70µm) to construct complete spectral energy distributions (SEDs) of compact sources. From these, we identify 207 candidate embedded YSOs in the observed region, ∼40% never-before identified. We discuss their position in far-infrared color-magnitude space, comparing with previously studied, spectroscopically confirmed YSOs and maser emission. All have red colors indicating massive cool envelopes and great youth. We analyze four example YSOs, determining their physical properties by fitting their SEDs with radiative transfer models. Fitting full SEDs including the Herschel data requires us to increase the size and mass of envelopes included in the models. This implies higher accretion rates (>10–4M/yr), in agreement with previous outflow studies of high-mass protostars. Our results show that Herschel provides reliable longwave SEDs of large samples of high-mass YSOs; discovers the youngest YSOs whose SEDs peak in Herschel bands; and constrains the physical properties and evolutionary stages of YSOs more precisely than was previously possible.

Abstract Copyright:

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

VizieR on-line data: <Available at CDS (J/A+A/518/L73): table1.dat>

Nomenclature: Fig. 2, Table 1: [SIC2010] YSO-N (Nos 1-4).

Simbad objects: 9

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Number of rows : 9
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 6555 1
2 LHA 120-N 105 EmO 05 09 57.1 -68 53 31           ~ 43 0
3 SSTISAGEMA J050958.52-685435.2 Y*O 05 09 58.52 -68 54 35.5           ~ 5 0
4 [SIC2010] YSO-4 Y*O 05 13 01.55 -69 10 34.8           ~ 2 0
5 2MASS J05131777-6922250 Y*O 05 13 17.773 -69 22 25.08           ~ 12 0
6 [SIC2010] YSO-2 Y*O 05 13 17.99 -69 20 04.9           ~ 2 0
7 LHA 120-N 113 HII 05 13 21.7 -69 21 33           ~ 108 1
8 NAME LMC Bar PoG 05 22 08 -69 23.5           ~ 299 0
9 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16509 1

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2023.01.30-22:45:33

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