Sign on

SAO/NASA ADS Astronomy Abstract Service


· Find Similar Abstracts (with default settings below)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· On-line Data
· References in the article
· Citations to the Article (33) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (7)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
The Extreme-Ultraviolet Spectrum of the Nearby K Dwarf ε Eridani
Authors:
Schmitt, J. H. M. M.; Drake, J. J.; Stern, R. A.; Haisch, B. M.
Publication:
Astrophysical Journal v.457, p.882 (ApJ Homepage)
Publication Date:
02/1996
Origin:
APJ
Astronomy Keywords:
STARS: CORONAE, STARS: INDIVIDUAL CONSTELLATION NAME: EPSILON ERIDANI, STARS: LATE-TYPE, ULTRAVIOLET: STARS
DOI:
10.1086/176783
Bibliographic Code:
1996ApJ...457..882S

Abstract

We present and discuss the extreme-ultraviolet spectrum of the nearby K2 dwarf ε Eri obtained with the spectrometers onboard the Extreme-Ultraviolet Explorer satellite (EUVE). In the EUVE spectrum of ε Eri we detect emission lines attributable to iron in the ionization stages Fe IX to Fe XXI, thus covering a rather large temperature range from less than 106 K to 107 K. While the lines in the lowest and highest ionization stages are relatively weak, the strongest lines detected are from Fe XV and Fe XVI, from which we infer a peak in the differential emission measure distribution at coronal temperatures of log Tc ˜ 6.4; significant emission measure is, however, also present at both higher and lower temperatures. This is in contrast to both lower activity stars whose EUV spectra are dominated by cooler Fe lines in the range 170-180 Å as well as the more active stars whose EUV spectra are dominated by hotter Fe lines in the range 110-135 Å. Finally, a density determination using line ratios of Fe XIII and Fe XIV results in coronal densities for ε Eri which are similar to solar active region densities.

Printing Options

Print whole paper
Print Page(s) through

Return 600 dpi PDF to Acrobat/Browser. Different resolutions (200 or 600 dpi), formats (Postscript, PDF, etc), page sizes (US Letter, European A4, etc), and compression (gzip,compress,none) can be set through the Printing Preferences



More Article Retrieval Options

HELP for Article Retrieval


Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)

  New!

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints