Spectropolarimetric study of selected cool supergiants

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Abundances of cool supergiants in the SMC young cluster NGC 330 ?

NGC 330 is the brightest SMC young cluster and contains many bright supergiants. This cluster has aroused special interest, since the earlier abundance determinations indicated an abundance lower by a factor ∼5 than in the SMC field young population. Taking advantage of our previous high resolution analysis of a sample of type K supergiants in the SMC field (Paper I and II), we analyse 6 cool s...

متن کامل

Carbon , nitrogen , oxygen and lithium abundances of six cool supergiants in the SMC ?

Carbon, nitrogen and oxygen abundances were derived from high-resolution spectra of 6 cool supergiants of the Small Magellanic Cloud. Oxygen-to-iron ratios (mean value [O/Fe] ≈–0.18 dex) are found to be similar to those found in young objects in the LMC and the Galaxy. This result is discussed in terms of chemical evolution. A mean deficiency of the carbon-to-iron ratio of [C/Fe] ≈–0.3 dex and ...

متن کامل

Spectropolarimetric Observations of Supernovae

We briefly review the existing database of supernova spectropolarimetry, concentrating on recent data and on results from our group’s research. Spectropolarimetry provides the only direct known probe of early-time supernova geometry. To obtain reliable conclusions, however, it is very important to correctly account for interstellar polarization. We find that Type IIn supernovae (SNe IIn) tend t...

متن کامل

woman-defined identity: analysis of selected poems of adrienne rich

the current thesis is composed in five chapters in the following fashion: chapter two encompasses the applied framework of the project in details; the methodology of carl gustav jung to explain the process of individuation, the major archetypes and their attributes and his techniques to assess the mind’s strata are all explained. moreover, the austrian psychoanalysts, heinz kohut’s models of a...

Spectroscopic study of the variability of three northern Of supergiants

The transition from early Of stars to WN type objects is poorly understood. O-type supergiants with emission lines (OIf) are considered to be intermediate between these two classes. The scope of this paper is to investigate the spectral variability of three Of supergiants. We constituted spectral time series of unprecedented quality for our targets (∼ 200 spectra in total), essentially in the b...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Proceedings of the International Astronomical Union

سال: 2014

ISSN: 1743-9213,1743-9221

DOI: 10.1017/s174392131400711x