2003A&A...397..285G


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.19CEST18:55:03

2003A&A...397..285G - Astronomy and Astrophysics, volume 397, 285-303 (2003/1-1)

Simultaneous optical and X-ray observations of flares and rotational modulation on the RS CVn binary HR 1099 (V711 Tau) from the MUSICOS 1998 campaign.

GARCIA-ALVAREZ D., FOING B.H., MONTES D., OLIVEIRA J., DOYLE J.G., MESSINA S., LANZA A.F., RODONO M., ABBOTT J., ASH T.D.C., BALDRY I.K., BEDDING T.R., BUCKLEY D.A.H., CAMI J., CAO H., CATALA C., CHENG K.P., DOMICIANO DE SOUZA A.Jr, DONATI J.-F., HUBERT A.-M., JANOT-PACHECO E., HAO J.X., KAPER L., KAUFER A., LEISTER N.V., NEFF J.E., NEINER C., ORLANDO S., O'TOOLE S.J., SCHAEFER D., SMARTT S.J., STAHL O., TELTING J. and TUBBESING S.

Abstract (from CDS):

We present simultaneous and continuous observations of the Hα, Hβ, He I D3, Na I D1, D2doublet and the Ca II H K lines for the RS CVn system HR 1099. The spectroscopic observations were obtained during the MUSICOS 1998 campaign involving several observatories and instruments, both echelle and long-slit spectrographs. During this campaign, HR 1099 was observed almost continuously for more than 8 orbits of 2d8. Two large optical flares were observed, both showing an increase in the emission of Hα, Ca II H K, H β and He I D3and a strong filling-in of the Na I D1, D2doublet. Contemporary photometric observations were carried out with the robotic telescopes APT-80 of Catania and Phoenix-25 of Fairborn Observatories. Maps of the distribution of the spotted regions on the photosphere of the binary components were derived using the Maximum Entropy and Tikhonov photometric regularization criteria. Rotational modulation was observed in Hα and He I D3in anti-correlation with the photometric light curves. Both flares occurred at the same binary phase (0.85), suggesting that these events took place in the same active region. Simultaneous X-ray observations, performed by ASM on board RXTE, show several flare-like events, some of which correlate well with the observed optical flares. Rotational modulation in the X-ray light curve has been detected with minimum flux when the less active G5 V star was in front. A possible periodicity in the X-ray flare-like events was also found.

Abstract Copyright:

Journal keyword(s): stars: binaries: spectroscopic - stars: late-type - stars: individual: HR 1099 - stars: atmospheres - stars: activity - stars: flare

Simbad objects: 10

goto Full paper

goto View the reference in ADS

Number of rows : 10

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 V* UX Ari RS* 03 26 35.3764089427 +28 42 54.211100955 7.76 7.28 6.37     K0IV 664 0
2 HD 22468B SB* 03 36 46.8441091729 +00 35 15.932783696   10.11 8.90     K4 28 0
3 HD 22468 RS* 03 36 47.2911034958 +00 35 15.938962144 7.09 6.63   5.4   K2:Vnk 1124 0
4 * 12 Tau * 03 39 51.1214818739 +03 03 24.714360191   6.483 5.555     K0III 51 0
5 HD 22819 * 03 39 59.5693538535 -01 07 16.406971378   7.111 6.123     K0III 20 0
6 V* YY Gem BY* 07 34 37.4475372002 +31 52 10.181030942 11.60 10.56 9.27 7.69 6.67 M0.5VeFe-2 820 0
7 V* DM UMa RS* 10 55 43.5440100939 +60 28 09.722249634   10.31 9.29     K0III-IV 153 0
8 V* EV Lac Er* 22 46 49.7311740821 +44 20 02.372223230   11.85 10.26 9.89   M4.0V 804 2
9 V* SZ Psc RS* 23 13 23.7750023418 +02 40 31.587196900   8.19 7.44   6.390 G5Vp 302 1
10 HD 224085 RS* 23 55 04.0516465022 +28 38 01.248194500 8.88 8.20   6.9   K2+IVeFe-1 684 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2003A&A...397..285G and select 'bookmark this link' or equivalent in the popup menu


2020.10.19-18:55:03

© Université de Strasbourg/CNRS

    • Contact