The ultraviolet spectrum of the peculiar post - AGB star HD 101584
نویسنده
چکیده
The high-resolution (R ≈ 10) nearultraviolet IUE spectrum of the peculiar post Asymptotic Giant Branch (post-AGB) supergiant HD 101584 (F0Iape) has been analyzed. In the wavelength range between 2500 and 3000 Å, 291 out of 332 absorption features are identified. The main contribution comes from FeII, CrII and MnII. Most of the absorption features are blends from several absorption lines. This is mainly due to the intrinsic broad line profiles in the spectrum of HD 101584 in combination with the many absorption lines which occur in the UV for a F-type spectrum. The list compiled gives for all measured absorption features between 2500 and 3000 Å the measured central wavelength of the core of the profile, the equivalent width of the profile if this could be determined, the depth of the profile, an asymmetry factor, a quality factor and lists the transitions which are responsible for the feature. An analysis of the radial velocities of the absorption profiles will be give in a separate paper.
منابع مشابه
A study on the nature of the peculiar supergiant HD 101584 ⋆
We present a study of lowand high-resolution ultraviolet, high-resolution optical CAT/CES spectra and ultraviolet, optical and infrared photometry of the peculiar supergiant HD 101584. From the photometry we learn that the ultraviolet and optical energy distribution cannot be fitted in a consistent way and we need a model in which the UV and optical energy distribution are formed by different g...
متن کاملar X iv : a st ro - p h / 95 10 12 0 v 1 2 3 O ct 1 99 5 1 THE VELOCITY GRADIENT IN THE PSEUDO
In this paper preliminary results are presented based on a study of the low and high resolution ultraviolet spectrum of the peculiar supergiant (post-AGB star) HD 101584. By a comparison of the low resolution spectrum (1200 − 3200Å) with standard stars, the star is classified as an A7I, indicating an effective temperature of 8150 K, where literature quotes spectral type F0I. The Doppler shift o...
متن کاملALMA view of the circumstellar environment of the post-common-envelope-evolution binary system HD 101584
Aims. We study the circumstellar evolution of the binary HD 101584, consisting of a post-AGB star and a low-mass companion, which is most likely a post-common-envelope-evolution system. Methods. We used ALMA observations of the 12CO, 13CO, and C18O J = 2−1 lines and the 1.3 mm continuum to determine the morphology, kinematics, masses, and energetics of the circumstellar environment. Results. Th...
متن کاملThe circumstellar molecular envelope of HD 101584
CO radio line observations reveal a molecular gas envelope around the peculiar star HD101584 with characteristics very similar to those of wellknown young post-AGB objects. We estimate that there is at least 0.1 M of molecular gas, very likely remnant gas from a former AGB-envelope. This gas has been efficiently accelerated to very high velocities (>50 km s−1, and a significant fraction to >100...
متن کاملThe 218 day period of the peculiar late B - type star HD 101584 ⋆
We have searched for periodicity in the photometric and spectroscopic variations of the enigmatic star HD 101584 and found a long-term variability on a typical time scale of 1700 days (4.7 years) and a highly significant period of 218± 0.7 day. This period is most prominently present in the photometric indices which are a measure for the Balmer jump (Geneva d and Strömgren c1). The Doppler velo...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1993