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Related papers: Ice chemistry in embedded young stellar objects in…

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This study aims to elucidate a possible link between chemical properties of ices in star-forming regions and environmental characteristics of the host galaxy. We performed 3--4 micron spectroscopic observations toward nine embedded…

Astrophysics of Galaxies · Physics 2016-01-06 Takashi Shimonishi , Emmanuel Dartois , Takashi Onaka , François Boulanger

The aim of this study is to understand the chemical conditions of ices around embedded young stellar objects (YSOs) in the metal-poor Large Magellanic Cloud (LMC). We performed near-infrared (2.5-5 micron) spectroscopic observations toward…

Solar and Stellar Astrophysics · Physics 2015-05-18 Takashi Shimonishi , Takashi Onaka , Daisuke Kato , Itsuki Sakon , Yoshifusa Ita , Akiko Kawamura , Hidehiro Kaneda

We present the comparison of the three most important ice constituents (water, CO and CO2) in the envelopes of massive Young Stellar Objects (YSOs), in environments of different metallicities: the Galaxy, the Large Magellanic Cloud (LMC)…

Solar and Stellar Astrophysics · Physics 2015-05-20 J. M. Oliveira , J. Th. van Loon , G. C. Sloan , R. Indebetouw , F. Kemper , A. G. G. M. Tielens , J. D. Simon , Paul M. Woods , M. Meixner

We present the first results of AKARI Infrared Camera near-infrared spec- troscopic survey of the Large Magellanic Cloud (LMC). We detected absorption features of the H2O ice 3.05 um and the CO2 ice 4.27 um stretching mode toward seven…

Using NIRSpec on JWST, we studied a sample of 15 intermediate-mass (1.8-4.1 Msun) young stellar objects (YSOs) previously identified with MIRI photometry in the low-metallicity NGC 346 star-forming cluster in the Small Magellanic Cloud…

We investigate the conditions of star formation in the Large Magellanic Cloud. We have conducted a survey for water maser emission arising from massive young stellar objects in the 30 Doradus region (N 157) and several other H II regions in…

Astrophysics · Physics 2009-11-11 J. M. Oliveira , J. Th van Loon , S. Stanimirovic , A. A. Zijlstra

We present new observations of 34 YSO candidates in the SMC. The anchor of the analysis is a set of Spitzer-IRS spectra, supplemented by groundbased 3-5 micron spectra, Spitzer and NIR photometry, optical spectroscopy and radio data. The…

Massive young stellar objects in the Magellanic Clouds show infrared absorption features corresponding to significant abundances of CO, CO$_2$ and H$_2$O ice along the line of sight, with the relative abundances of these ices differing…

Astrophysics of Galaxies · Physics 2018-02-21 Tyler Pauly , R. T. Garrod

As nearby neighbors to the Milky Way, the Large and Small Magellanic Clouds (LMC and SMC) provide a unique opportunity to study star formation in the context of their galactic ecosystems. Thousands of young stellar objects (YSOs) have been…

Astrophysics of Galaxies · Physics 2019-01-16 Megan Reiter , Omnarayani Nayak , Margaret Meixner , Olivia Jones

This paper presents Spitzer-IRS spectroscopy of the CO2 15.2 micron bending mode toward a sample of 50 embedded low-mass stars in nearby star-forming clouds, taken mostly from the ``Cores to Disks (c2d)'' Legacy program. The average…

We present and categorize Spitzer IRS spectra of 294 objects in the Large Magellanic Cloud (LMC) to create the largest and most complete catalog of massive young stellar object (YSO) spectra in the LMC. Target sources were identified from…

General results from a 3-5 micron spectroscopic survey of nearby low-mass young stellar objects are presented. L and M-band spectra have been obtained of \~50 low mass embedded young stars using the ISAAC spectrometer mounted on UT1-Antu at…

Astrophysics · Physics 2007-05-23 K. M. Pontoppidan , H. Fraser , F. L. Schoeier , E. Dartois , W. -F. Thi , E. F. van Dishoeck

We investigate the molecular bands in carbon-rich AGB stars in the Large Magellanic Cloud (LMC), using the InfraRed Spectrograph (IRS) on board the Spitzer Space Telescope (SST) over the 5--38 micron range. All 26 low-resolution spectra…

Sensitive 5-38 um Spitzer Space Telescope (SST) and ground based 3-5 um spectra of the embedded low mass protostars B5 IRS1 and HH46 IRS show deep ice absorption bands superposed on steeply rising mid-infrared continua. The ices likely…

We present Spitzer IRS spectroscopy of CO2 ice bending mode spectra at 15.2 micrometer toward 19 young stellar objects with luminosity lower than 1 Lsun (3 with luminosity lower than 0.1 Lsun). Ice on dust grain surfaces can encode the…

Solar and Stellar Astrophysics · Physics 2015-06-11 Hyo Jeong Kim , Neal J. Evans , Michael M. Dunham , Jeong-Eun Lee , Klaus M. Pontoppidan

The close environment of the central supermassive black hole of our Galaxy is studied thoroughly since decades in order to shed light on the behavior of the central regions of galaxies in general and of active galaxies in particular. The…

Astrophysics of Galaxies · Physics 2015-06-08 Jihane Moultaka , Andreas Eckart , Koralka Muzic

The Central Molecular Zone (CMZ) contains a substantial reservoir of dense molecular gas, where numerous young stellar objects (YSOs) and dense cloud cores have been identified. However, the large distance and severe foreground extinction…

Astrophysics of Galaxies · Physics 2026-03-04 Yewon Kang , Deokkeun An , Jiwon Han , Sang-Il Han , Dayoung Pyo , A. C. Adwin Boogert , Kee-Tae Kim , Do-Young Byun

A powerful way to observe directly the solid state inventory of dense molecular clouds is by infrared spectroscopy of background stars. We present Spitzer/IRS 5-20 micron spectra of ices toward stars behind the Serpens and Taurus molecular…

We report the detection of several molecular gas-phase and ice absorption features in three photometrically-selected young stellar object (YSO) candidates in the central 280 pc of the Milky Way. Our spectra, obtained with the Infrared…

We present the first thermal-infrared spectra of an extra-galactic Young Stellar Object (YSO), IRAS05328-6827 in the HII region LHA 120-N148 in the Large Magellanic Cloud. The observed and modelled spectral energy distribution reveals a…

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