scholarly journals Interstellar extinction for two regions in the Large Magellanic Cloud from the S2/68 sky-survey telescope

1979 ◽  
Vol 186 (3) ◽  
pp. 421-432 ◽  
Author(s):  
K. Nandy ◽  
D. H. Morgan ◽  
D. J. Carnochan
Keyword(s):  
Interstellar Extinction ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Sky Survey

scholarly journals AGB Stars in the Large Magellanic Cloud as Seen with DeNIS

1999 ◽  
Vol 190 ◽  
pp. 385-386 ◽  
Author(s):  
M. R. Cioni ◽  
H. J. Habing ◽  
C. Loup ◽  
N. Epchtein ◽  
the DeNIS Consortium
Keyword(s):  
Near Infrared ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Agb Stars ◽  
Infrared Photometry ◽  
Sky Survey ◽  
Right Ascension

We present infrared photometry of LMC stars taken from a region of 2.5° in right ascension from the DeNIS (Deep Near Infrared Southern Sky Survey) survey.

scholarly journals Large scale distribution of gas, dust and stars deduced from observations from the UV to the IR

1991 ◽  
Vol 148 ◽  
pp. 69-70
Author(s):  
J. Koornneef
Keyword(s):  
Large Scale ◽  
Cross Correlation ◽  
Stellar Population ◽  
Dust Emission ◽  
Interstellar Extinction ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Stellar Associations

We introduce an as yet unpublished set of OAO-II observations of stellar associations in the Large Magellanic Cloud (LMC). Cross-correlation of the photometric characteristics of these fields with the infrared fluxes at these same positions obtained by the IRAS satellite provides information on the local stellar population, the amounts of interstellar extinction and thermal dust emission.

Interstellar extinction in the Large Magellanic Cloud

Nature ◽  
1980 ◽  
Vol 283 (5749) ◽  
pp. 725-729 ◽  
Author(s):  
K. Nandy ◽  
D. H. Morgan ◽  
A. J. Willis ◽  
R. Wilson ◽  
P. M. Gondhalekar ◽  
...  
Keyword(s):  
Interstellar Extinction ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud

scholarly journals Interstellar extinction in the Large Magellanic Cloud

1981 ◽  
Vol 196 (4) ◽  
pp. 955-966 ◽  
Author(s):  
K. Nandy ◽  
D. H. Morgan ◽  
A. J. Willis ◽  
R. Wilson ◽  
P. M. Gondhalekar
Keyword(s):  
Interstellar Extinction ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud

scholarly journals The study of unclassified B[e] stars and candidates in the Galaxy and Magellanic Clouds†

2019 ◽  
Vol 488 (1) ◽  
pp. 1090-1110 ◽  
Author(s):  
C A H Condori ◽  
M Borges Fernandes ◽  
M Kraus ◽  
D Panoglou ◽  
C A Guerrero
Keyword(s):  
Main Sequence ◽  
Interstellar Extinction ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Magellanic Clouds ◽  
Light Curves ◽  
Evolutionary Stage ◽  
The Third ◽  
The Galaxy ◽  
Gaia Dr2

ABSTRACT We investigated 12 unclassified B[e] stars or candidates, 8 from the Galaxy, 2 from the Large Magellanic Cloud (LMC), and 2 from the Small Magellanic Cloud (SMC). Based on the analysis of high-resolution spectroscopic (FEROS) and photometric data, we confirmed the presence of the B[e] phenomenon for all objects of our sample, except for one (IRAS 07455-3143). We derived their effective temperature, spectral type, luminosity class, interstellar extinction and, using the distances from Gaia DR2, we obtained their bolometric magnitude, luminosity, and radius. Modelling of the forbidden lines present in the FEROS spectra revealed information about the kinematics and geometry of the circumstellar medium of these objects. In addition, we analysed the light curves of four stars, finding their most probable periods. The evolutionary stage of 11 stars of our sample is suggested from their position on the HR diagram, taking into account evolutionary tracks of stars with solar, LMC, and SMC metallicities. As results, we identified B and B[e] supergiants, B[e] stars probably at the main sequence or close to its end, post-AGB and HAeB[e] candidates, and A[e] stars in the main sequence or in the pre-main sequence. However, our most remarkable results are the identification of the third A[e] supergiant (ARDB 54, the first one in the LMC), and of an ‘LBV impostor’ in the SMC (LHA 115-N82).

scholarly journals The Mid-IR Extinction Law in the LMC

2012 ◽  
Vol 8 (S292) ◽  
pp. 286-286
Author(s):  
Jian Gao ◽  
Mengyao Xue ◽  
B. W. Jiang
Keyword(s):  
Molecular Clouds ◽  
Milky Way ◽  
Interstellar Extinction ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
The Other ◽  
Additional Absorption ◽  
Mid Infrared ◽  
Grain Model

AbstractThe mid-infrared (MIR) extinction law in the Large Magellanic Cloud (LMC) at four IRAC bands is derived using the data of the Spitzer/SAGE Program. The derived mean extinctions are A[3.6]/AKs = 0.68±0.03, A[4.5]/AKs = 0.97±0.03, A[5.8]/AKs = 0.54±0.04, and A[8.0]/AKs = 0.58±0.07. The results show that: (1) The extinctions at [3.6], [5.8] and [8.0] of the LMC consist a flat curve, similar to that of the Milky Way (MW) predicted by the interstellar grain model at Rv = 5.5; (2) The extinction at [4.5] is clearly higher than the other three bands, which may be caused by the additional absorption of the 4.27μm CO2 ice and/or the 4.67μm CO ice in the LMC molecular clouds; (3) As far as individual sightlines are concerned, the MIR interstellar extinction law Aλ/AKs in the LMC varies with sightlines as the MW does.

A Discussion on astronomy in the ultraviolet - Preliminary observations of the Magellanic Clouds with the ultraviolet sky survey telescope

1975 ◽  
Vol 279 (1289) ◽  
pp. 473-477 ◽  
Keyword(s):  
Surface Brightness ◽  
Luminosity Function ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Magellanic Clouds ◽  
Sky Survey

Observations of the Magellanic Clouds have been made with the ultraviolet skysurvey telescope (S2-68) on board the E.S.R.O. satellite TD-1A. From the data so far reduced, the ultraviolet surface brightness has been derived for four wavelength bands centred near 1550, 1950, 2350 and 2740 A Ultraviolet maps of the Large Magellanic Cloud are presented and the flux distributions in each cloud are compared with that expected from a galactic luminosity function.

scholarly journals 2MASS Observations of the Large Magellanic Cloud

1999 ◽  
Vol 190 ◽  
pp. 363-365 ◽  
Author(s):  
S.D. Van Dyk ◽  
R. Cutri ◽  
M. D. Weinberg ◽  
S. Nikolaev ◽  
M. F. Skrutskie
Keyword(s):  
Processing System ◽  
Stellar Populations ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Point Sources ◽  
Detector Arrays ◽  
Photometric Calibration ◽  
Sky Survey ◽  
Mass Functions ◽  
Hgcdte Detector

The Two Micron All Sky Survey (2MASS) has observed a portion of the Large Magellanic Cloud (LMC) at J (1.25 μm), H (1.65 μm), and Ks (2.17 μm), as part of its routine nightly operations with an automated 1.3-m telescope at CTIO, Chile. The camera observes the sky in the three channels simultaneously, using 256 × 256 HgCdTe detector arrays. The survey samples the sky in 6° x 8.′3 scans. The 2MASS Production Processing System provides final atlas images and source extractions with precise photometric calibration and astrometric positions. The survey's 10σ sensitivity is 15.8 mag at J, 15.1 at H, and 14.3 at Ks. 2MASS will ultimately detect ~107 point sources in the LMC and will support analyses of the ages, luminosity and mass functions, and metallicities of the red stellar populations and a census of AGB and carbon stars, as well as extinction maps, across the LMC. This work presents an initial analysis of ~20 square degrees.

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