1998A&AS..129..541O -
Astron. Astrophys., Suppl. Ser., 129, 541-552 (1998/May-1)
High resolution spectroscopy of the post-red supergiant IRC+10420. I. The data.
OUDMAIJER R.D.
Abstract (from CDS):
A high resolution optical spectrum of the post-red supergiant candidate IRC+10420 is presented. The Utrecht Echelle Spectrograph observations, with a total integration time of more than 9 hours, provide a spectral coverage from 3850Å to 1 µm, and a spectral resolution of 9km/s. The spectrum is shown, and an identification list of lines in the spectrum is provided. From a preliminary analysis of the spectrum we find that the spectral type of IRC+10420 has changed from F8I
+ in 1973 to mid- to early A type now, confirming the results of Oudmaijer et al. (
1996MNRAS.280.1062O), who claimed a change in temperature based on photometric changes. It is shown that most of the emission lines in the spectrum of IRC+10420 are blue-shifted with respect to the systemic velocity traced by circumstellar rotational CO emission, while the (few) absorption lines - with the exception of some high excitation lines - are red-shifted by 25km/s, which may suggest infall of material onto the star. Finally, it is found that the interstellar extinction towards IRC+10420 as traced by the Diffuse Interstellar Bands is very large, with an inferred E(B-V) of 1.4±0.5 compared to a total E(B-V) of 2.4.
Abstract Copyright:
∼
Journal keyword(s):
stars: circumstellar matter - stars: emission-line, Be - stars: individual: IRC+10420 - stars: AGB and post-AGB - stars: supergiants
VizieR on-line data:
<Available at CDS (J/A+AS/129/541): tableb1.dat>
Simbad objects:
6
Full paper
View the references in ADS
To bookmark this query, right click on this link: simbad:1998A&AS..129..541O and select 'bookmark this link' or equivalent in the popup menu