UBVRI Photometry of Infrared Stars

1970 ◽  
Vol 82 ◽  
pp. 765 ◽  
Author(s):  
Thomas A. Lee
Keyword(s):  
Ubvri Photometry ◽  
Infrared Stars

scholarly journals Discovery of Infrared Stars in Globular Clusters in the Magellanic Clouds and Their Light Variations

1998 ◽  
Vol 11 (1) ◽  
pp. 395-395
Author(s):  
S. Nishida ◽  
T. Tanabé ◽  
S. Matsumoto ◽  
T. Onaka ◽  
Y. Nakada ◽  
...  
Keyword(s):  
Mass Loss ◽  
Globular Clusters ◽  
Main Sequence ◽  
Near Infrared ◽  
Magellanic Clouds ◽  
Infrared Light ◽  
Agb Stars ◽  
Dust Shells ◽  
Infrared Stars ◽  
Infrared Survey

A systematic near-infrared survey was made for globular clusters in the Magellanic Clouds. Two infrared stars were discovered in NGC419 (SMC) and NGC1783 (LMC). NGC419 and NGC1783 are well-studied rich globular clusters whose turn-off masses and ages are estimated MTO ~ 2.0 Mʘ and т ~1.2 Gyr for NGC419, and MT0 ~ 2.0 Mʘ and т ʘ 0.9 Gyr for NGC1783, respectively. The periods of the infrared light variations were determined to be 540 dfor NGC419IR1 and to be 480 d for NGC1783IR1, respectively. Comparison of the measurements with the period—if magnitude relation for carbon Miras in the LMC by Groenewegen and Whitelock(1996) revealed that the Kmagnitudes of the infrared stars were fainter by about 0.3 — 0.8 magnitude than those predicted by the P — K relation. This deviation can be explained if the infrared stars are surrounded by thick dust shells and are obscured even in the K band. The positions of NGC419IR1and NGC1783IR1 on the P — K diagram suggest that AGB stars with the main sequence masses of about 2 Mʘ start their heavy mass-loss when P ʘ 500 d.

scholarly journals UBVRI photometry of the Durham-AAT redshift survey

1998 ◽  
Vol 294 (1) ◽  
pp. 147-164 ◽  
Author(s):  
N. Metcalfe ◽  
A. Ratcliffe ◽  
T. Shanks ◽  
R. Fong
Keyword(s):  
Ubvri Photometry ◽  
Redshift Survey

Infrared stars

1974 ◽  
pp. 183-197
Author(s):  
JOHN S. GLASBY
Keyword(s):  
Infrared Stars

scholarly journals On the Nature of Maser Sources in Infrared Stars

1975 ◽  
Vol 67 ◽  
pp. 175-177
Author(s):  
V. V. Burdjuzha ◽  
T. V. Ruzmaikina
Keyword(s):  
Dust Shell ◽  
Infrared Stars ◽  
Maser Sources ◽  
Photospheric Temperature

Supergiant infrared stars with OH maser emissions, like NML Cyg, VY CMa, and VX Sgr, are discussed assuming a model consisting of a star with a photospheric temperature of about 2000 K and a radius of R ∼ 2 × 1014 cm surrounded by a gas and dust shell. A possible similarity with OH Miras is mentioned.

Infrared stars,in binary systems.

1974 ◽  
Vol 190 ◽  
pp. 339 ◽  
Author(s):  
R. M. Humphreys ◽  
E. P. Ney
Keyword(s):  
Binary Systems ◽  
Infrared Stars

Position Measurements of Main-Line Oh/infrared Stars

1971 ◽  
Vol 169 ◽  
pp. L123 ◽  
Author(s):  
Ellen G. Hardebeck ◽  
William J. Wilson
Keyword(s):  
Main Line ◽  
Infrared Stars
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