2004A&A...428..953H


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.18CEST11:44:59

2004A&A...428..953H - Astronomy and Astrophysics, volume 428, 953-967 (2004/12-4)

Rotation periods of Post-T Tauri stars in Lindroos systems.

HUELAMO N., FERNANDEZ M., NEUHAEUSER R. and WOLK S.J.

Abstract (from CDS):

We present a rotational study of Post-T Tauri stars (PTTSs) in Lindroos systems, defined as binaries with early type primaries on the main-sequence (MS) and late-type secondaries on the pre-main-sequence (PMS) phase. The importance of this study in comparison with previous ones is that the Lindroos sample is not X-ray selected so we avoid a possible bias towards fast rotators. In this preliminary study we have monitored eleven stars in the UBVRI bands during two campaigns of ten consecutive nights each. Eight of the observed PTTSs show periodic modulations in their lightcurves and the derived periods range from 1.9d to 8.0d. The comparison of these results with theoretical rotational tracks based on disk-star locking theory shows that star-disk decoupling times of 1-20Myr could reproduce the rotational properties of the targets, assuming an initial rotation period of ∼8d and a mass of 1M. We have studied the rotation-activity relations of Lindroos PTTSs and compared them with those found in other groups of PMS and zero-age main-sequence (ZAMS) ∼1M stars. The Lindroos sample displays activity-rotation relations very similar to those found in TTSs. It contains a mixture of very active stars, with LX/Lbol ratios close to the saturation level of -3, and less active (unsaturated) stars. This could be the result of different star-disk decoupling times. Future monitoring of a larger and unbiased sample of PTTS will be important to confirm the significance of these results.

Abstract Copyright:

Journal keyword(s): stars: pre-main sequence - stars: late-type - stars: rotation - X-rays: stars - stars: binaries: visual

Simbad objects: 34

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Number of rows : 34

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 * 34 Psc * 00 10 02.2026446215 +11 08 44.925917994   5.456 5.530   5.58 B9Vn 129 0
2 * 34 Psc B * 00 10 02.3864682259 +11 08 37.818484938     10.37     G5Ve 100 0
3 * pi. Ari ** 02 49 17.55924 +17 27 51.5168 4.68         B6V 95 0
4 * pi. Ari B * 02 49 17.7625712549 +17 27 49.948583229   8.19 7.92     A0Vp 4 0
5 * e Tau V* 03 48 16.2652935060 +11 08 35.885447327 4.34 4.94 5.07     B3V 120 0
6 TYC 661-1404-1 * 03 48 16.81392 +11 08 40.4484           F3Vn 9 0
7 * chi Tau SB* 04 22 34.9435236779 +25 37 45.528896965   5.344 5.378     B9Vnn 101 0
8 * chi Tau B * 04 22 35.5495102568 +25 38 03.215942712   9.08 8.47     F8V 20 0
9 V* AM Lep BY* 05 12 17.5860382881 -11 51 58.034058642     9.92   9.32 G8Ve 17 0
10 * iot Lep ** 05 12 17.9019041 -11 52 09.186279 3.95 4.35 4.45     B7.5Vn 105 0
11 ** HJ 3279C * 05 47 42.7 +13 53 32     12.01     G2V 7 0
12 * 133 Tau V* 05 47 42.9080737232 +13 53 58.544154880 4.46 5.12 5.29     B2IV-V 87 0
13 * gam Col Pu* 05 57 32.2095768 -35 16 59.815276 3.52 4.18 4.36     B2.5IV 122 0
14 V* BD Col Ro* 05 57 34.7882288526 -35 17 11.398715064     12.66 12.57   ~ 7 0
15 V* V680 Car Ro* 07 00 14.7453528718 -60 51 54.874184475     11.75     G5V 6 0
16 HD 53191 * 07 00 16.7303392124 -60 51 45.829537207   7.65 7.90     A0V 23 0
17 V* BC Men BY* 07 11 27.3059147193 -84 28 12.579141143           G8V 5 0
18 HD 60102 * 07 11 38.4093776434 -84 28 09.759878802   7.55 7.54     B9/9.5V 20 0
19 HD 86388B PM* 09 55 04.6803248983 -69 11 28.109539977   9.22 8.82 9.22   ~ 5 0
20 HD 86388 PM* 09 55 05.6009163703 -69 11 20.280871555   6.79 6.86 8.09   B9V 17 0
21 V* BZ Ant TT* 10 29 34.77 -30 36 33.1     9.65     F9Ve 8 0
22 * del Ant * 10 29 35.3822401873 -30 36 25.422376542 5.34 5.52 5.56     B9/9.5V 53 0
23 * del Crv B PM* 12 29 50.8907908157 -16 31 15.206614589 10.13 9.38 8.43     K1 32 0
24 * del Crv PM* 12 29 51.8551642 -16 30 55.552542 2.80 2.89 2.94 2.99 3.03 A0IV(n)kB9 189 0
25 HD 109573 PM* 12 36 01.0317721349 -39 52 10.222698506   5.786 5.774 7.25 5.81 A0V 567 1
26 * f Cen * 13 06 16.7041134 -48 27 47.845997 4 4.552 4.691     B4V 104 0
27 V* V1155 Cen BY* 13 06 17.8394295863 -48 27 45.439479910   11.62 10.80     ~ 19 0
28 * ksi02 Cen SB* 13 06 54.6393973 -49 54 22.482324 3.29 4.08 4.27     B3V 130 0
29 V* V1261 Cen Ro* 13 06 57.1934171668 -49 54 26.519216840   10.7 10.80     ~ 10 0
30 TYC 2553-626-1 * 14 29 47.6900325690 +31 47 21.889601218   11.36 10.53 11.18   K0V 8 0
31 HD 127304 * 14 29 49.6704431538 +31 47 28.278888987   6.034 6.050     A0Vs(Si) 80 0
32 CD-44 9590B * 14 45 56.2 -44 52 32     12.93     ~ 11 0
33 CD-39 10298B * 16 04 43.9 -39 26 10     12.2     ~ 7 1
34 V* LM Lup a2* 16 04 44.4890499672 -39 26 04.780382706   6.86 6.94   6.968 ApSiCr 61 1

    Equat.    Gal    SGal    Ecl

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2021.04.18-11:44:59

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