منابع مشابه
Complicated pulsation in the δ Scuti variable 59 Aurigae
Eight-night photoelectric photometric observations through v and y bands confirm the complicated pulsation of δ Scuti variable 59 Aurigae. Power spectra of light curves show multi-period pulsation behavior, and eight pulsation frequencies f1=6.8283, f2=6.3179, f3=5.0074, f4=5.9535, f5=4.3285, f6=5.6854, f7=9.0206 and f8=8.6260 cycles per day are identified. After subtraction of the best eight f...
متن کاملLuminous Red Variable Star
We report photometry and spectroscopy of the evolution of Nova Sagittarii 1994 #1 (V4332 Sagittarii) during outburst. We compare the photometric and spectral evolution of this outburst to known classes of outbursts – including classical novae and outbursts occurring on symbiotic stars – and find this object does not conform to any known class of outburst. The closest match to the behavior of th...
متن کاملMid - Infrared Imaging of the Herbig Ae Star AB Aurigae : Extended Emission on Several Scales 1
We present high sensitivity sub-arcsecond resolution images of the Herbig Ae star AB Aurigae at 11.6 and 18.5 μm taken with Michelle on Gemini North. Bright extended dust emission close to the star is resolved at both wavelengths, with quadratically subtracted FWHM of 17±4 AU at 11.6 μm and 22±5 AU at 18.5 μm. Additional, fainter emission is detected out to a radius of 280 AU at 11.6 μm and 350...
متن کاملNLTE calculations of neutral helium lines in the wind of the Herbig Ae star AB Aurigae
In order to improve our knowledge about the structure of the winds of the Herbig Ae/Be stars and the mechanisms that drive them, we performed a NLTE analysis of the formation of helium lines in the wind of AB Aur, the prototype of the whole class. These lines are indeed expected to form in the densest layers of the envelope, at the very base of the wind, and therefore to provide constraints on ...
متن کاملEmission line star 3 G 71 : a Herbig Ae / Be star candidate
We present new optical spectral observations of 3G71, the previously suspected optical counterpart of the hard X-ray source 1H2214+589. The spectra of 3G71 exhibit many forbidden lines, unusually intense H-Balmer emission lines and the approximately B5 spectral type. Such spectral features, together with its large IRAS infrared color excess and associated with nebulosity, provide evidences that...
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ژورنال
عنوان ژورنال: Astronomische Nachrichten
سال: 1901
ISSN: 0004-6337,1521-3994
DOI: 10.1002/asna.19011551207