2000ApJ...544..475M


C.D.S. - SIMBAD4 rel 1.7 - 2020.11.25CET07:20:19

2000ApJ...544..475M - Astrophys. J., 544, 475-480 (2000/November-3)

Extreme-ultraviolet flares in an F2 star.

MULLAN D.J. and MATHIOUDAKIS M.

Abstract (from CDS):

We report on the coronal properties of two early F dwarfs. For both stars, spectroscopic data reveal a hot corona with material at temperatures as high as 107.1-107.2 K. The EUV photometric observations of one of the stars (HR 120: F2) reveal two large flares with rapid decay times. The rapid decays are in striking contrast with previously published slowly decaying flares on a late type F star (HR 1817: F8/9). Analysis of decay times suggests that the loop sizes which flared in the F2 star are significantly shorter than those which flared in the F8/9 star. We discuss these results in the context of a proposal made by Giampapa & Rosner.

Abstract Copyright:

Journal keyword(s): Stars: Activity - Stars: Coronae - stars: individual (HR 120, 71 Taurus)

Simbad objects: 4

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Number of rows : 4

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 HD 2726 PM* 00 30 26.0867926984 -48 12 53.199084373   6.005 5.664     F2V 53 0
2 HD 22468 RS* 03 36 47.2911034958 +00 35 15.938962144 7.09 6.63   5.4   K2:Vnk 1127 0
3 * 71 Tau dS* 04 26 20.7730189928 +15 37 05.788526607   4.758 4.480 5.96 4.15 F0V 210 0
4 V* AF Lep RS* 05 27 04.7631691589 -11 54 03.466187467   6.832 6.295     F8V(n)k: 211 0

    Equat.    Gal    SGal    Ecl

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2020.11.25-07:20:19

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