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We perform a systematic study of evolutionary stages and stellar masses of young stellar objects (YSOs) in the Large Magellanic Cloud (LMC) to investigate properties of star formation of the galaxy. There are 4825 sources in our YSO sample,…

Astrophysics of Galaxies · Physics 2023-08-16 Takuma Kokusho , Hiroki Torii , Hidehiro Kaneda , Yasuo Fukui , Kengo Tachihara

We present images and spectral energy distributions (SEDs) of massive young stellar objects (YSOs) in three star-forming H II regions of the Large Magellanic Cloud: N159A, N159 Papillon, and N160. We use photometry from SOFIA/FORCAST at…

Astrophysics of Galaxies · Physics 2017-01-18 Michael S. Gordon , Terry J. Jones , Robert D. Gehrz , L. Andrew Helton

The process of massive star ($M\geq8~M_\odot$) formation is still poorly understood. Observations of massive young stellar objects (MYSOs) are challenging due to their rarity, short formation timescale, large distances, and high…

The G333 giant molecular cloud contains a few star clusters and H II regions, plus a number of condensations currently forming stars. We have mapped 13 of these sources with the appearance of young stellar objects (YSOs) with the Spitzer…

Astrophysics of Galaxies · Physics 2015-05-30 Janet P. Simpson , Angela S. Cotera , Michael G. Burton , Maria Cunningham , Nadia Lo , Indra Bains

We have investigated the young stellar population in and around SFO 38, one of the massive globules located in the northern part of the Galactic HII region IC 1396, using the Spitzer IRAC and MIPS observations (3.6 to 24 micron) and…

Astrophysics of Galaxies · Physics 2015-05-18 Rumpa Choudhury , Bhaswati Mookerjea , H. C. Bhatt

We use various analytical techniques to study Young Stellar Objects (YSOs) in an area of approximately $10' \times 10'$ in the IRAS 18456-0223 star-forming region. We use archival optical (Gaia DR3) and infrared (2MASS, UKIDSS, Spitzer,…

Solar and Stellar Astrophysics · Physics 2026-03-06 Nilesh Pandey , U. S. Kamath

We present new images and photometry of the massive star forming complex Cygnus X obtained with IRAC and MIPS on the Spitzer Space Telescope. A combination of IRAC, MIPS, UKIDSS, and 2MASS data are used to identify and classify young…

The \textit{Spitzer} SAGE survey has allowed the identification and analysis of significant samples of Young Stellar Object (YSO) candidates in the Large Magellanic Cloud (LMC). However the angular resolution of \textit{Spitzer} is…

Solar and Stellar Astrophysics · Physics 2015-12-02 J. L. Ward , J. M. Oliveira , J. Th. van Loon , M. Sewilo

Wide-field searches for young stellar objects (YSOs) can place useful constraints on the prevalence of clustered versus distributed star formation. The Spitzer/IRAC Candidate YSO (SPICY) catalog is one of the largest compilations of such…

Massive stars can alter physical conditions and properties of their ambient interstellar dust grains via radiative heating and shocks. The HII regions in the Large Magellanic Cloud (LMC) offer ideal sites to study the stellar energy…

Astrophysics of Galaxies · Physics 2015-06-18 Ian W. Stephens , Jessica Marie Evans , Rui Xue , You-Hua Chu , Robert A. Gruendl , Dominique M. Segura-Cox

We present observations of the giant HII region complex N159 in the LMC using IRAC on the {\it Spitzer Space Telescope}. One of the two objects previously identified as protostars in N159 has an SED consistent with classification as a Class…

We present here the recent results on two distant Galactic H II regions, namely NGC~2282 and Sh2-149, obtained with multiwavelength observations. Our optical spectroscopic analysis of the bright sources have been used to identify the…

Astrophysics of Galaxies · Physics 2018-06-04 Somnath Dutta , Soumen Mondal , Jessy Jose , R K. Das

We study a very young star-forming region in the outer Galaxy that is the most concentrated source of outflows in the Spitzer Space Telescope GLIMPSE360 survey. This region, dubbed CMa-l224, is located in the Canis Major OB1 association.…

We present the photometric catalogs for the star-forming cluster NGC 602 in the wing of the Small Magellanic Cloud covering a range of wavelengths from optical HST/ACS (F555W, F814W) and SMARTS/ANDICAM (V, I) to infrared (Spitzer/IRAC 3.6,…

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 52-93 micron spectra, obtained with the Spitzer Space Telescope, of luminous compact far-IR sources in the SMC. These comprise 9 Young Stellar Objects (YSOs), the compact HII region N81 and a similar object within N84, and two…

Astrophysics of Galaxies · Physics 2015-05-18 Jacco Th. van Loon , Joana M. Oliveira , Karl D. Gordon , G. C. Sloan , C. W. Engelbracht

Using photometric data of infrared surveys, young stellar object (YSO) status is verified for 141 objects selected in our previous papers in the Cassiopeia and Camelopardalis segment of the Milky Way bounded by Galactic coordinates (l, b) =…

Solar and Stellar Astrophysics · Physics 2018-03-14 V. Straizys , A. Kazlauskas

Spitzer IRAC images (3.6, 4.5, 5.8 and 8.0$\mu$m) and photometry of the star forming region M8 are presented. IRAC photometry reveals ongoing star formation in the M8 complex, with 64 Class 0/I and 168 Class II sources identified in several…

Astrophysics of Galaxies · Physics 2010-05-10 L. K. Dewangan , B. G. Anandarao

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…

The Spitzer Space Telescope mapped the Perseus molecular cloud complex with IRAC and MIPS as part of the c2d Spitzer Legacy project. This paper combines the observations from both instruments giving an overview of low-mass star formation…

Solar and Stellar Astrophysics · Physics 2015-08-06 Kaisa E. Young , Chadwick H. Young , Shih-Ping Lai , Michael M. Dunham , Neal J. Evans