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N113 is an HII region located in the central part of the Large Magellanic Cloud (LMC) with an associated molecular cloud very rich in molecular species. Most of the previously observed molecular lines cover the frequency range 85-270 GHz.…

星系天体物理 · 物理学 2016-08-10 S. Paron , M. E. Ortega , M. Cunningham , P. A. Jones , M. Rubio , C. Fariña , S. Komugi

We present a new method to evaluate the dust extinction (AV) along the line of sight using the InfraRed Survey Facility (IRSF) near-infrared (NIR) data of the Large Magellanic Cloud (LMC) HI ridge region. In our method, we estimate an AV…

星系天体物理 · 物理学 2021-07-07 Takuya Furuta , Hidehiro Kaneda , Takuma Kokusho , Yasushi Nakajima , Yasuo Fukui , Kisetsu Tsuge

LHA 115-N 83 (N83) and LHA 115-N 84 (N84) are HII regions associated with the early stage of star formation located in the Small Magellanic Cloud (SMC). We have analyzed the new HI data taken with the Galactic Australian Square Kilometre…

星系天体物理 · 物理学 2020-06-16 T. Ohno , Y. Fukui , K. Tsuge , H. Sano , K. Tachihara

We used Spitzer's Infrared Spectrograph (IRS) to observe stars in the Small Magellanic Cloud (SMC) selected from the Midcourse Space Experiment (MSX) Point Source Catalog. We concentrate on the dust properties of oxygen-rich evolved stars,…

太阳与恒星天体物理 · 物理学 2017-01-13 K. E. Kraemer , G. C. Sloan , P. R. Wood , O. C. Jones , M. P. Egan

We combine variability information from the MAssive Compact Halo Objects (MACHO) survey of the Large Magellanic Cloud (LMC) with infrared photometry from the Spitzer Space Telescope Surveying the Agents of a Galaxy's Evolution (SAGE) survey…

太阳与恒星天体物理 · 物理学 2015-05-06 David Riebel , Margaret Meixner , Oliver Fraser , Sundar Srinivasan , Kem Cook , Uma Vijh

We present Antarctic Submillimeter Telescope and Remote Observatory (AST/RO) observations of 12CO J=4-3 and C I emission in the N44 H II complex in the Large Magellanic Cloud. We detected strong 12CO J=4-3 emission toward the H II region…

天体物理学 · 物理学 2009-11-10 Sungeun Kim , Wilfred Walsh , Kecheng Xiao

We report the discovery of a substantial stellar overdensity in the periphery of the Large Magellanic Cloud (LMC), found using public imaging from the first year of the Dark Energy Survey. The structure appears to emanate from the edge of…

星系天体物理 · 物理学 2016-04-27 Dougal Mackey , Sergey E. Koposov , Denis Erkal , Vasily Belokurov , Gary S. Da Costa , Facundo A. Gómez

Fourteen stars from a sample of Magellanic Cloud objects selected to have a mid-infrared flux excess have been found to also show TiO bands in emission. The mid-infrared dust emission and the TiO band emission indicate that these stars have…

太阳与恒星天体物理 · 物理学 2015-06-16 P. R. Wood , D. Kamath , H. Van Winckel

We have used archival HST H$\alpha$ images to study the immediate environments of massive and intermediate-mass young stellar object (YSO) candidates in the Large Magellanic Cloud (LMC). The sample of YSO candidates, taken from Gruendl &…

太阳与恒星天体物理 · 物理学 2014-11-20 Kaushar Vaidya , You-Hua Chu , Robert A. Gruendl , C. -H. Rosie Chen , Leslie W. Looney

Classical supersoft X-ray sources (SSSs) are understood as close binary systems in which a massive white dwarf (WD) accretes from its companion at rates sustaining steady hydrogen burning on its surface generating bolometric luminosities of…

高能天体物理现象 · 物理学 2022-09-28 Augustin Skopal

Motivated by new sounding-rocket wide-field polarimetric images of the Large Magellanic Cloud, we have used a three-dimensional Monte Carlo radiation transfer code to investigate the escape of near-ultraviolet photons from young stellar…

天体物理学 · 物理学 2016-08-30 Andrew A. Cole , Kenneth Wood , Kenneth H. Nordsieck

A fast moving infrared excess source (G2) which is widely interpreted as a core-less gas and dust cloud approaches Sagittarius A* (SgrA*) on a presumably elliptical orbit. VLT K_s-band and Keck K'-band data result in clear continuum…

We discuss several sets of Ti II absorption-line data, which probe a variety of interstellar environments in our Galaxy and in the Magellanic Clouds. Comparisons of high-resolution (FWHM ~ 1.3-1.5 km/s) Ti II spectra of Galactic targets…

星系天体物理 · 物理学 2015-05-18 Daniel E. Welty , Paul A. Crowther

Very sensitive HI 21cm observations have been made in 860 directions at dec >= -43deg in search of weak, Galactic, high-velocity HI emission lines at moderate and high Galactic latitudes. One-third of the observations were made toward…

天体物理学 · 物理学 2009-11-07 Felix J. Lockman , Edward M. Murphy , Sara Petty-Powell , Vincent J. Urick

We present high-resolution maps of the dust reddening in the Magellanic Clouds (MCs). The maps cover the Large and Small Magellanic Cloud (LMC and SMC) area and have a spatial angular resolution between $\sim$ 26 arcsec and 55 arcmin. Based…

星系天体物理 · 物理学 2022-01-19 B. -Q. Chen , H. -L. Guo , J. Gao , M. Yang , Y. -L. Liu , B. -W. Jiang

We present the first mid-IR detection of the linear polarization toward the star CygOB2-12, a luminous blue hypergiant that, with Av of ~10 mag of foreground extinction, is a benchmark in the study of the properties of dust in the diffuse…

We present spectral energy distribution (SED) models for the edge-on classical T Tauri star HH30 IRS that indicate dust grains have grown to larger than 50 microns within its circumstellar disk. The disk geometry and inclination are known…

天体物理学 · 物理学 2009-11-07 Kenneth Wood , Michael J. Wolff , J. E. Bjorkman , Barbara Whitney

We present the detection of very extended stellar populations around the Large Magellanic Cloud (LMC) out to R~21 degrees, or ~18.5 kpc at the LMC distance of 50 kpc, as detected in the Survey of the MAgellanic Stellar History (SMASH)…

We present ISO photometric and spectroscopic observations of a sample of 57 bright Asymptotic Giant Branch stars and red supergiants in the Large Magellanic Cloud, selected on the basis of IRAS colours indicative of high mass-loss rates.…

Spectral line survey observations of 7 molecular clouds in the Large Magellanic Cloud (LMC) have been conducted in the 3 mm band with the Mopra 22 m telescope to reveal chemical compositions in low metallicity conditions. Spectral lines of…