1999A&A...345..514T


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.28CET10:35:55

1999A&A...345..514T - Astronomy and Astrophysics, volume 345, 514-520 (1999/5-2)

A BeppoSAX observation of HD 9770: a visual triple system containing a recently discovered short-period eclipsing binary.

TAGLIAFERRI G., COVINO S., CUTISPOTO G. and PALLAVICINI R.

Abstract (from CDS):

We have studied the coronal X-ray emission of the recently discovered short-period eclipsing binary HD 9770 with the BeppoSAX satellite. The data from the Low Energy and Medium Energy Concentrator Spectrometers (LECS & MECS) onboard BeppoSAX allow studying the spectrum of this star from 0.1 to 8keV, confirming that this is a very active coronal source, with strong flaring activity. The X-ray emission most likely originates from the eclipsing binary itself, rather than from the other visual component of the system. The X-ray light curves could be modulated with the orbital period of the eclipsing binary, with a hint for a different orbital modulation of the cooler and hotter plasma. The X-ray spectrum is characterized by hot plasma, with the Fe K complex at 6.7keV clearly detected in the MECS spectrum, and it is well fitted by a 2-temperature optically thin plasma model with low metal abundances (∼0.3Z). These results are in line with those found for many other active stars. As expected, during the flare the X-ray emission is dominated by hotter plasma with a temperature >4keV. There is an indication that the metal abundance may be somewhat higher during the flare.

Abstract Copyright:

Journal keyword(s): stars: activity - stars: binaries: eclipsing - stars: coronae - stars: flare - stars: individual: HD 9770 - X-rays: stars

Simbad objects: 12

goto View the reference in ADS

Number of rows : 12

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 * bet Cet PM* 00 43 35.37090 -17 59 11.7827 3.90 3.02 2.01 1.29 0.78 G9.5IIICH-1 496 0
2 V* CF Tuc RS* 00 53 07.7682099536 -74 39 05.609032263   8.31 7.90   6.730 G2/5V+F0 216 0
3 HD 9770 ** 01 35 01.0078925286 -29 54 37.342172838 8.605 8.03 7.096 6.551 6.035 K1V 142 0
4 V* VY Ari RS* 02 48 43.7283572894 +31 06 54.592580835   7.72   6.4   G9 205 0
5 * bet Per Al* 03 08 10.1324535 +40 57 20.328013 1.70 2.07 2.12 2.08 2.11 B8V 1139 2
6 * alf Aur SB* 05 16 41.35871 +45 59 52.7693 1.33 0.88 0.08 -0.52 -0.96 G3III: 1135 0
7 V* AF Lep RS* 05 27 04.7631691589 -11 54 03.466187467   6.832 6.295     F8V(n)k: 203 0
8 HD 36705 TT* 05 28 44.8916324761 -65 26 55.289846904 8.259 7.856 6.999 6.496 5.993 K0V 920 0
9 V* TY Pyx RS* 08 59 42.7216317719 -27 48 58.694776546 7.82 7.56 6.87     G5V 245 0
10 V* AR Lac RS* 22 08 40.8180372773 +45 44 32.104045703 7.09 6.83 6.11     K0IVe+G5IV 693 0
11 * lam And RS* 23 37 33.8426114 +46 27 29.337984 5.54 4.84 3.82 3.04 2.47 G8IVk 639 0
12 HD 224085 RS* 23 55 04.0516465022 +28 38 01.248194500 8.88 8.20   6.9   K2+IVeFe-1 675 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 1999A&A...345..514T and select 'bookmark this link' or equivalent in the popup menu


2020.01.28-10:35:55

© Université de Strasbourg/CNRS

    • Contact