SIMBAD references

2008ApJ...686L..99S - Astrophys. J., 686, L99-L102 (2008/October-3)

AKARI near-infrared spectroscopy: detection of H2 O and CO2Ices toward young stellar objects in the Large Magellanic Cloud.

SHIMONISHI T., ONAKA T., KATO D., SAKON I., ITA Y., KAWAMURA A. and KANEDA H.

Abstract (from CDS):

We present the first results of AKARI Infrared Camera near-infrared spectroscopic survey of the Large Magellanic Cloud (LMC). We detected absorption features of the H2 O ice 3.05 µm and the CO2ice 4.27 µm stretching mode toward seven massive young stellar objects (YSOs). These samples are for the first time spectroscopically confirmed to be YSOs. We used a curve-of-growth method to evaluate the column densities of the ices and derived the CO2/H2O ratio to be 0.45±0.17. This is clearly higher than that seen in Galactic massive YSOs (0.17±0.03). We suggest that the strong ultraviolet radiation field and/or the high dust temperature in the LMC may be responsible for the observed high CO2 ice abundance.

Abstract Copyright:

Journal keyword(s): Stars: Circumstellar Matter - ISM: Dust, Extinction - ISM: Abundances - ISM: Molecules - Galaxies: Magellanic Clouds - Stars: Pre-Main-Sequence

Nomenclature: Table 1: [SOK2008] STN (Nos ST1-ST7).

Simbad objects: 7

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