Results 1 to 10 of about 9,753 (245)
Near infrared light variations of CP stars [PDF]
Astronomy and Astrophysics Supplement Series, 1998 Twelve magnetic Chemically Peculiar (CP2) stars of the SiSrCrEu subgroup mostly brighter than the 7.5 visual magnitude have been investigated in the infrared at 1.25, 1.6 and 2.2 . The stars HD 74521, HD 90044, HD 119419, HD 125630, and HD 187473 are clearly variable in the near infrared with the same period as the visible light, spectrum, and magnetic
F. A. Catalano, F. Leone, R. Kroll
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Near-infrared photometry of carbon stars [PDF]
Monthly Notices of the Royal Astronomical Society, 2006 Abstract Near-infrared, JHKL, photometry of 239 Galactic C-rich variable stars is presented and discussed. From these and published data, the stars were classified as Mira or non-Mira variables, and amplitudes and pulsation periods, ranging from 222 to 948 d for the Miras, were determined for most of them.
Patricia A. Whitelock +3 more
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Infrared Spectroscopy of Be Stars [PDF]
Symposium - International Astronomical Union, 1994 FeII emission lines are present in a variety of astrophysical objects and, in particular, in Be stars, where in some situations they can also be seen in absorption. Selvelli & Araujo (1984) studied a sample of classical Be stars that have FeII emission lines in the optical region.
R.M. Torres +2 more
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The Astrophysical Journal, 1967 Our searches for very cool stars have revealed three kinds of objects: very cool Mira stars, perhaps cooler than any of this type previously known; extremely dense interstellar clouds, more dense than any known heretofore; and, probably, cool circumstellar clouds that may be planetary systems in an early stage of formation.
Robert F. Wing +2 more
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Infrared spectral classification of normal stars [PDF]
Astronomy & Astrophysics, 2002 Moderate resolution (400) 2.38-45.2m infrared spectra of stars without dust features were obtained with the Short Wavelength Spectrometer (SWS) on board the Infrared Space Observatory (ISO). The observations are part of a larger program with the objective to extend and refine the current infrared classification schemes.
Heras, A.M. +10 more
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Infrared speckle interferometry of OH-stars [PDF]
Symposium - International Astronomical Union, 1987 We have begun a co-ordinated programme of high angular-resolution radio and infrared measurements to study the physical structure of the circumstellar envelopes surrounding high mass-loss OH-stars. Here we give near-infrared (NIR) angular diameters for 5 stars.
Jessica M. Chapman, R. D. Wolstencroft
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Infrared imaging of late-type stars [PDF]
Monthly Notices of the Royal Astronomical Society, 1996 Infrared imaging properties of dusty winds around late-type stars are investigated in detail, employing a self-consistent model that couples the equations of motion and radiative transfer. Because of general scaling properties, the angular profiles of surface brightness are self-similar. In any given star, the profile shape is determined essentially by
Ivezic, Zeljko, Elitzur, Moshe
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The Astronomical Journal, 1982 The results of an observational program aimed at setting up a network of faint near-infrared standards of sufficient accuracy are reported. The network covers both northern and southern hemispheres and includes standards red enough to provide at least a limited check on color transformations.
J. H. Elias +3 more
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Axion stars in the infrared limit [PDF]
Journal of High Energy Physics, 2015 14 pages, 2 ...
Eby, Joshua +3 more
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Infrared Studies of Symbiotic Stars [PDF]
International Astronomical Union Colloquium, 1982 AbstractInfrared photometry and spectroscopy of symbiotic stars is reviewed. It is shown that at wavelengths beyond lym these systems are generally dominated by the cool star’s photosphere and, indeed, are indistinguishable from ordinary late-type giants. About 25% of symbiotic stars exhibit additional emission due to circumstellar dust.
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