2001A&A...373..966J


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.21CEST08:42:24

2001A&A...373..966J - Astronomy and Astrophysics, volume 373, 966-973 (2001/7-3)

The T Tauri star RX J1608.6-3922 - not an eclipsing binary but a spotted single star.

JOERGENS V., GUENTHER E., NEUHAEUSER R., FERNANDEZ M. and VIJAPURKAR J.

Abstract (from CDS):

High-resolution spectroscopy and photometric monitoring of the pre-main sequence star RX J1608.6-3922 shows that it is not an eclipsing binary, as previously claimed. Radial velocity measurements covering suitable time spans in order to detect a spectroscopic binary with the claimed period of about 7 days have been performed. The scatter of the radial velocity does not exceed 2.4km/s, defining an upper mass limit of 24MJupiter for any eclipsing companion orbiting this star with the claimed period. Photometric observations of RX J1608.6-3922 in 7 consecutive nights (i.e. as long as the claimed orbital period) reveal brightness variations of the order of 0.2mag with a period of 3.6days. The shape of the detected light curve differs from a light curve of the star recorded in 1996. The small variations of the radial velocity, the variable shape of the light curve, as well as (B-V) color variations suggest that the flux of RX J1608.6-3922 is modulated by spots on the stellar surface with a rotational period of 3.6days. The stellar activity of this star seems to be highly variable, taking into account the variable shape of the light curve, with an amplitude varying from 0.5 to 0.2mag in a few years, as well as hints for a variable Hα equivalent width.

Abstract Copyright:

Journal keyword(s): binaries: eclipsing - binaries: spectroscopic - stars: individual: RX J1608.6-3922 - pre-main-sequence - stars: rotation - stars: starspots

Simbad objects: 21

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Number of rows : 21

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 HD 22468 RS* 03 36 47.2911034958 +00 35 15.938962144 7.09 6.63   5.4   K2:Vnk 1117 0
2 V* V410 Tau TT* 04 18 31.1083261392 +28 27 16.155411536   12.13 10.75 8.45 9.408 K3Ve 416 0
3 V* V397 Aur TT* 04 56 02.0261376554 +30 21 03.635056925   13.07 11.72 11.25   K7e 147 0
4 V* V1642 Ori TT* 05 29 20.633592 +00 41 27.99600   13.31 12.31 12.03   K2 45 0
5 V* V1321 Ori Or* 05 35 04.3009468008 -05 08 12.736574621   11.94 10.538   9.117 K0III 89 0
6 * sig Gem RS* 07 43 18.7269793 +28 53 00.642191 6.38 5.41 4.29 3.37 2.79 K1IIIe 442 0
7 * 9 Cha Al* 08 43 12.1978606956 -79 04 12.366179858   6.28 6.07     A7V 203 0
8 V* DM UMa RS* 10 55 43.5440100939 +60 28 09.722249634   10.31 9.29     K0III-IV 152 0
9 V* RS CVn Al* 13 10 36.9078781154 +35 56 05.587686902 8.57 8.51 7.93 7.7   F6IV+G8IV 677 0
10 * 37 Lib PM* 15 34 10.7020905 -10 03 52.306353 6.48 5.63 4.62 3.85 3.33 K1III-IV 155 0
11 NAME Lupus I Cld 15 43 02.1 -34 09 06           ~ 214 0
12 NAME Lup II MoC 15 57 08 -37 47.1           ~ 90 1
13 NAME Lup Cloud SFR 16 03 -38.1           ~ 481 0
14 NAME Lupus IV MoC 16 03 12.4 -42 07 43           ~ 121 0
15 V* V1094 Sco TT* 16 08 36.1770068081 -39 23 02.462096497 16.01 15.00 13.48 12.47 11.45 ~ 45 1
16 NAME Lupus III SFR 16 09.6 -39 03           ~ 262 0
17 NAME Lupus V MoC 16 21 -37.5           ~ 52 0
18 V* BY Dra BY* 18 33 55.7719224141 +51 43 08.903033617 10.22 9.23   8.733   K4Ve+K7.5Ve 592 0
19 V* TY CrA Ae* 19 01 40.8312189956 -36 52 33.801844387 10.03 9.92 9.39     B9e 266 0
20 V* EK Cep Al* 21 41 21.5039950844 +69 41 34.108387051   7.95 7.89     A0V 197 0
21 V* HK Lac RS* 22 04 56.6089126762 +47 14 04.482220545   8.01 6.96     K0III 228 0

    Equat.    Gal    SGal    Ecl

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2019.10.21-08:42:24

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