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相关论文: A Survey for C II Emission-Line Stars in the Large…

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We present the final results of an imaging and spectroscopic search for stars in the Large Magellanic Cloud (LMC) with C II 7231, 7236 emission lines. The goal is to identify and study [WC11] stars, the coolest of the low-mass Wolf-Rayet…

太阳与恒星天体物理 · 物理学 2023-01-18 Bruce Margon , Nidia Morrell , Philip Massey , Kathryn F. Neugent , Robert Williams

We present new, accurate positions, spectral classifications, radial and rotational velocities, H-alpha fluxes, equivalent widths and B,V,I,R magnitudes for 579 hot emission-line stars (classes B0 - F9) in the Large Magellanic Cloud which…

太阳与恒星天体物理 · 物理学 2015-06-05 Warren A. Reid , Quentin A. Parker

We report the serendipitous discovery of an object, UVQS J060819.93-715737.4, with a spectrum dominated by extremely intense, narrow C II emission lines. The spectrum is similar to those of the very rare, late-type [WC11] low-mass…

太阳与恒星天体物理 · 物理学 2020-01-09 Bruce Margon , Catherine Manea , Robert Williams , Howard E. Bond , J. Xavier Prochaska , Michal K. Szymanski , Nidia Morrell

With the aim to corroborate the result of a search for chemically peculiar stars in the Large Magellanic Cloud (LMC) we present measurements obtained from CCD-imaging of two fields, one containing a young open cluster (NGC 1711). While for…

天体物理学 · 物理学 2009-11-13 E. Paunzen , O. I. Pintado , H. M. Maitzen , A. Claret

We present ESO/VLT spectra in the 2.9--4.1 micron range for a large sample of infrared stars in the Large Magellanic Cloud (LMC), selected on the basis of MSX and 2MASS colours to be extremely dust-enshrouded AGB star candidates. Out of 30…

The numbers and types of evolved massive stars found in nearby galaxies provide an exacting test of stellar evolution models. Because of their proximity and rich massive star populations, the Magellanic Clouds have long served as the…

太阳与恒星天体物理 · 物理学 2015-07-15 Philip Massey , Kathryn F. Neugent , Nidia Morrell

We present new observations of 470 stars using the Fibre Large Array Multi-Element Spectrograph (FLAMES) instrument in fields centered on the clusters NGC 330 and NGC 346 in the Small Magellanic Cloud (SMC), and NGC 2004 and the N11 region…

天体物理学 · 物理学 2007-05-23 C. J. Evans , D. J. Lennon , S. J. Smartt , C. Trundle

The [CII]158um line is one of the dominant cooling lines in star-forming active regions. The commonly assumed clumpy UV-penetrated cloud models predict a [CII] line profile similar to that of CO. However, recent spectral-resolved…

Over the years, directed surveys and incidental spectroscopy have identified 12 Wolf-Rayet (WR) stars in the SMC and 139 in the LMC, numbers which are often described as "essentially} complete." Yet, new WRs are discovered in the LMC almost…

太阳与恒星天体物理 · 物理学 2015-06-19 Philip Massey , Kathryn F. Neugent , Nidia Morrell , D. John Hillier

Surveys of Wolf-Rayet (WR) stars in the Large Magellanic Cloud (LMC) have yielded a fairly complete catalog of 154 known stars. We have conducted a comprehensive, multiwavelength study of the interstellar/circumstellar environments of WR…

星系天体物理 · 物理学 2021-07-29 Clara Shang Hung , Po-Sheng Ou , You-Hua Chu , Robert A. Gruendl , Chuan-Jui Li

For the past three years we have been conducting a survey for WR stars in the Large and Small Magellanic Clouds (LMC, SMC). Our previous work has resulted in the discovery of a new type of WR star in the LMC, which we are calling WN3/O3.…

太阳与恒星天体物理 · 物理学 2017-03-15 Philip Massey , Kathryn F. Neugent , Nidia Morrell

We have carried out a search for optically visible post-Asymptotic Giant Branch (post-AGB) stars in the Large Magellanic Cloud (LMC). First, we selected candidates with a mid-IR excess and then obtained their optical spectra. We…

太阳与恒星天体物理 · 物理学 2015-10-19 Devika Kamath , Peter R. Wood , Hans Van Winckel

The region of the Small Magellanic Cloud (SMC) with which this paper is concerned contains the highest concentration of IRAS/Spitzer sources, H I emission, and molecular clouds in this neighboring galaxy. However very few studies have been…

太阳与恒星天体物理 · 物理学 2015-05-27 R. Selier , M. Heydari-Malayeri , D. A. Gouliermis

The VISTA survey of the Magellanic Clouds System (VMC) is collecting deep $K_\mathrm{s}$--band time--series photometry of the pulsating variable stars hosted in the system formed by the two Magellanic Clouds and the Bridge connecting them.…

The stellar mass-luminosity relation is poorly constrained by observations for high mass stars. We describe our program to find eclipsing massive binaries in the Magellanic Clouds using photometry of regions rich in massive stars, and our…

太阳与恒星天体物理 · 物理学 2015-06-03 Philip Massey , Nidia I. Morrell , Kathryn F. Neugent , Laura R. Penny , Kathleen-DeGioia Eastwood , Douglas R. Gies

We present a new sample of 4634 eclipsing binary stars in the Large Magellanic Cloud (LMC), expanding on a previous sample of 611 objects and a new sample of 1509 eclipsing binary stars in the Small Magellanic Cloud (SMC), that were…

We report the results of an intense, spectroscopic survey of all 41 late-type, nitrogen-rich Wolf-Rayet (WR) stars in the Large Magellanic Cloud (LMC) observable with ground-based telescopes. This survey concludes the decade-long effort of…

天体物理学 · 物理学 2009-11-13 O. Schnurr , A. F. J. Moffat , N. St-Louis , N. I. Morrell , M. A. Guerrero-Roncel

Interstellar C IV absorption line studies of the hot gaseous halo of the Large Magellanic Cloud (LMC) have been hindered by non-ideal selections of early-type probe stars in regions where C+3 can be produced locally via photoionization,…

We study the 158 micron [CII] fine-structure line emission from star-forming regions as a function of metallicity. We have measured and mapped the [CII] emission from the very bright HII region complexes N 11 in the LMC and N 66 in the SMC,…

宇宙学与河外天体物理 · 物理学 2015-05-27 F. P. Israel , P. R. Maloney

In this work we analyse Colour-Magnitude Diagrams (CMDs) of catalogued star clusters located in the Large Magellanic Cloud (LMC), from a YJKs photometric data set obtained by the Visible and Infrared Survey Telescope for Astronomy (VISTA)…

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