scholarly journals Young Stellar Objects in the Low-Metallicity Small Magellanic Cloud

2012 ◽  
Vol 8 (S292) ◽  
pp. 112-112
Author(s):  
M. Sewiło ◽  
L. R. Carlson ◽  
J. P. Seale ◽  
R. Indebetouw ◽  
M. Meixner ◽  
...  
Keyword(s):  
Galaxy Evolution ◽  
Magellanic Cloud ◽  
Young Stellar Objects ◽  
High Mass ◽  
Optical Data ◽  
Small Magellanic Cloud ◽  
Stellar Objects ◽  
Near Ir ◽  
Low Metallicity ◽  
Dust Distribution

AbstractThe Spitzer Legacy Program “Surveying the Agents of Galaxy Evolution in the Tidally-Stripped, Low-Metallicity Small Magellanic Cloud” (SAGE-SMC; Gordon et al. 2011) allows a global study of star formation in the SMC at high enough resolution to resolve individual cores and protostars at a range of mid-IR wavelengths. Using the SAGE-SMC IRAC (3.6 - 8.0 μm) and MIPS (24 and 70 μm) catalogs and images combined with the near-IR and optical data, we identified a population of ∼1100 intermediate- to high-mass Young Stellar Objects (YSOs) in the SMC (3 × more than previously known). We investigate the properties of the YSOs and how they relate to the galaxy's structure and gas and dust distribution.

scholarly journals Infrared spectroscopy in the C–H stretching region towards embedded high-mass young stellar objects in the Large Magellanic Cloud

2015 ◽  
Vol 11 (A29A) ◽  
Author(s):  
Takashi Shimonishi ◽  
Emmanuel Dartois ◽  
Takashi Onaka ◽  
François Boulanger
Keyword(s):  
Infrared Spectroscopy ◽  
Absorption Band ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Young Stellar Objects ◽  
High Mass ◽  
Stellar Objects ◽  
Spectroscopic Observations ◽  
Spectral Bands ◽  
Low Metallicity

AbstractWe report the results of infrared spectroscopic observations of embedded high-mass young stellar objects in the Large Magellanic Cloud. The CH3OH ice absorption band as well as the 3.47 μm absorption band are detected toward the embedded sources in the LMC. The properties of these spectral bands in the low metallicity environment are investigated based on comparisons with Galactic embedded sources.

scholarly journals Massive young stellar objects in the N 66/NGC 346 region of the SMC

2018 ◽  
Vol 615 ◽  
pp. A121 ◽  
Author(s):  
M. Rubio ◽  
R. H. Barbá ◽  
V. M. Kalari
Keyword(s):  
Star Formation ◽  
Magellanic Cloud ◽  
Young Stellar Objects ◽  
High Mass ◽  
Spectral Energy ◽  
Mass Star ◽  
Spectral Features ◽  
Small Magellanic Cloud ◽  
Energy Distributions ◽  
Stellar Objects

We present HK spectra of three sources located in the N 66 region of the Small Magellanic Cloud. The sources display prominent stellar Brγ and extended H2 emission, and exhibit infrared excesses at λ > 2 μm. Based on their spectral features, and photometric spectral energy distributions, we suggest that these sources are massive young stellar objects. The findings are interpreted as evidence of on-going high mass star formation in N 66.

scholarly journals Early-stage young stellar objects in the Small Magellanic Cloud

2012 ◽  
Vol 428 (4) ◽  
pp. 3001-3033 ◽  
Author(s):  
J. M. Oliveira ◽  
J. Th. van Loon ◽  
G. C. Sloan ◽  
M. Sewiło ◽  
K. E. Kraemer ◽  
...  
Keyword(s):  
Early Stage ◽  
Magellanic Cloud ◽  
Young Stellar Objects ◽  
Small Magellanic Cloud ◽  
Stellar Objects

scholarly journals Characterising the Protostellar Population of the Magellanic Clouds with VLT/SINFONI

2015 ◽  
Vol 11 (S315) ◽  
Author(s):  
Jacob Ward ◽  
Joana Oliveira ◽  
Jacco van Loon ◽  
Marta Sewilo
Keyword(s):  
Star Formation ◽  
Milky Way ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Magellanic Clouds ◽  
Emission Lines ◽  
Young Stellar Objects ◽  
Small Magellanic Cloud ◽  
Stellar Objects ◽  
Accretion Rates

AbstractAt distances of ~50 kpc and ~60 kpc for the Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC) respectively the Magellanic Clouds present us with a unique opportunity to study star formation in environments outside our own galaxy. Through Spitzer and Herschel photometry and spectroscopy, samples of Young Stellar Objects (YSOs) have been selected and spectroscpically confirmed in the Magellanic Clouds. Here we present some of the key results of our SINFONI K-band observations towards massive YSOs in the Magellanic Clouds. We resolve a number of Spitzer sources into multiple, previously unresolved, components and our analysis of emission lines suggest higher accretion rates and different disc properties compared with massive YSOs in the Milky Way.

scholarly journals Formation of high-mass stars in an isolated environment in the Large Magellanic Cloud

2019 ◽  
Vol 71 (2) ◽  
Author(s):  
Ryohei Harada ◽  
Toshikazu Onishi ◽  
Kazuki Tokuda ◽  
Sarolta Zahorecz ◽  
Annie Hughes ◽  
...  
Keyword(s):  
Star Formation ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Young Stellar Objects ◽  
High Mass ◽  
Mass Star ◽  
Giant Molecular Clouds ◽  
Stellar Objects ◽  
Stellar Cluster ◽  
The Galaxy

Abstract The aim of this study is to characterize the distribution and basic properties of the natal gas associated with high-mass young stellar objects (YSOs) in isolated environments in the Large Magellanic Cloud. High-mass stars usually form in giant molecular clouds (GMCs) as part of a young stellar cluster, but some OB stars are observed far from GMCs. By examining the spatial coincidence between the high-mass YSOs and 12CO (J = 1–0) emission detected by NANTEN and Mopra observations, we selected ten high-mass YSOs that are located away from any of the NANTEN clouds but are detected by the Mopra pointed observations. The ALMA observations revealed that a compact molecular cloud whose mass is a few thousand solar masses or smaller is associated with the high-mass YSOs, which indicates that these compact clouds are the sites of high-mass star formation. The high density and high temperature throughout the clouds are explained by the severe photodissociation of CO due to the lower metallicity than in the Galaxy. The star formation efficiency ranges from several to as high as ∼40%, indicating efficient star formation in these environments. The enhanced turbulence may be a cause of the efficient star formation therein, as judged from the gas velocity information and the association with the lower density gas.

ERRATUM: “SURVEYING THE AGENTS OF GALAXY EVOLUTION IN THE TIDALLY STRIPPED, LOW-METALLICITY SMALL MAGELLANIC CLOUD (SAGE-SMC). II. COOL EVOLVED STARS” (2011, AJ, 142, 103)

2012 ◽  
Vol 143 (5) ◽  
pp. 127
Author(s):  
Martha L. Boyer ◽  
Sundar Srinivasan ◽  
Jacco Th. van Loon ◽  
Iain McDonald ◽  
Margaret Meixner ◽  
...  
Keyword(s):  
Galaxy Evolution ◽  
Magellanic Cloud ◽  
Small Magellanic Cloud ◽  
Evolved Stars ◽  
Low Metallicity

scholarly journals Early results from the SAGE-SMC Spitzer legacy

2008 ◽  
Vol 4 (S256) ◽  
pp. 184-188
Author(s):  
Karl D. Gordon ◽  
M. Meixner ◽  
R. D. Blum ◽  
W. Reach ◽  
B. A. Whitney ◽  
...  
Keyword(s):  
Galaxy Evolution ◽  
Column Density ◽  
Dust Emission ◽  
Magellanic Cloud ◽  
Small Magellanic Cloud ◽  
Multiple Sources ◽  
Tail Region ◽  
Early Results ◽  
Low Metallicity

AbstractEarly results from the SAGE-SMC (Surveying the Agents of Galaxy Evolution in the tidally-disrupted, low-metallicity Small Magellanic Cloud) Spitzer legacy program are presented. These early results concentrate on the SAGE-SMC MIPS observations of the SMC Tail region. This region is the high H i column density portion of the Magellanic Bridge adjacent to the SMC Wing. We detect infrared dust emission and measure the gas-to-dust ratio in the SMC Tail and find it similar to that of the SMC Body. In addition, we find two embedded cluster regions that are resolved into multiple sources at all MIPS wavelengths.

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