1998A&AS..128..561B


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.28CET02:30:25

1998A&AS..128..561B - Astron. Astrophys., Suppl. Ser., 128, 561-571 (1998/March-2)

Photometric variability of southern T Tauri stars.

BATALHA C.C., QUAST G.R., TORRES C.A.O., PEREIRA P.C.R., TERRA M.A.O., JABLONSKI F., SCHIAVON R.P., DE LA REZA R. and SARTORI M.J.

Abstract (from CDS):

We present photometric light curves of T Tauri Stars (TTS) observed in the Southern hemisphere. Our list includes 26 TTS, half of which were discovered by the Pico dos Dias survey (PDS). The majority of the observed PDS stars are weak TTS and present, on average, the low range of variability typical of such stars. We monitored some of the stars for several seasons in order to detect possible changes in rotational modulation. In particular, we find that the classical TTS, AS 216, shows a stable period of 3.12d for three consecutive years (between 1985 and 1987) which then does not reveal itself during the observing season of 1989 and 1990. Coupled with this change during the last two observing seasons is an overall increase in the amplitude of the photometric variability in all colors. We derive photometric periods for 13 previously unmonitored objects, and confirm the previously published rotational period of SY Cha. In addition, we confirm that TW Cha and SZ 82 do not reveal any signs of periodic modulation.

Abstract Copyright:

Journal keyword(s): stars: pre-main sequence - stars: variable

VizieR on-line data: <Available at CDS (J/A+AS/128/561): fig1.ps fig2.ps fig3.ps fig4.ps fig5.ps fig6.ps fig7.ps fig8.ps>

Simbad objects: 27

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Number of rows : 27

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 V* ER Eri RS* 02 10 07.9121400736 -54 30 40.273518989   10.95 9.85 9.96 8.808 K1IIIe 21 1
2 V* SY Cha Or* 10 56 30.3882538728 -77 11 39.402450501         11.29 K5Ve 115 0
3 V* TW Cha Or* 10 59 01.0608276980 -77 22 40.946475900     13.40   11.68 K8Ve 117 0
4 V* CT Cha Or* 11 04 09.0989057683 -76 27 19.326914289   13.44 13.00   10.89 K7Ve 112 0
5 CD-29 8887 TT* 11 09 13.8074415397 -30 01 40.070212113   12.95 11.119 10.642 8.875 M2Ve 112 0
6 V* VZ Cha Or* 11 09 23.7736314968 -76 23 20.855918834   13.82 12.94   12.14 K7e 128 0
7 V* WY Cha Or* 11 10 07.0323174364 -76 29 37.640377806   15.29 13.87   11.62 K8Ve 80 1
8 TWA 3 ** 11 10 27.894072 -37 31 51.96612   13.53 12.05 11.61 9.29 M4Ve+M4Ve 201 0
9 TWA 3A TT* 11 10 27.9117558304 -37 31 51.529219753   14.04 12.57   9.10 M4Ve 193 0
10 Ass Cha T 1-32 Y*O 11 17 36.9756500866 -77 04 38.121286249   13.1 13.50   11.78 M0.5e 76 0
11 V* DZ Cha LM* 11 49 31.8520891363 -78 51 01.058647109     12.832   10.732 M0Ve 66 0
12 V* T Cha Or* 11 57 13.5268556629 -79 21 31.521755129   10.00 11.86     K0e 241 1
13 CPD-68 1894 TT* 13 22 07.5420267499 -69 38 12.216304202   11.38 10.393   9.117 K1Ve 133 0
14 CD-40 8434 TT* 14 08 10.1545137760 -41 23 52.576649494   13.42 12.18 11.71 10.506 K7IVe 145 0
15 Sz 77 TT* 15 51 46.9579216483 -35 56 44.112995611   12.0       K5.5 55 0
16 THA 15-12 Or* 15 56 09.2067120748 -37 56 06.126159332   13.12 11.93 11.45   M0e 275 0
17 V* MY Lup TT* 16 00 44.5199369001 -41 55 30.931594414   12.64 12.17 11.06   K0 69 0
18 Sz 108 TT* 16 08 42.7407765342 -39 06 18.300900350   14.68 11.78 11.72 11.16 ~ 35 0
19 V* V1098 Sco Or* 16 14 07.9265848818 -19 38 29.102453123   13.02 11.83     K1Ve 21 0
20 V* VV Sco Or* 16 15 34.56528 -22 42 42.1092     12.684   10.660 K5Ve+M0Ve 48 0
21 CD-25 11504 Or* 16 25 38.480136 -26 13 54.28524   12.56 11.40 11.16   K7Ve 35 0
22 IRAS 16443-1509 TT* 16 47 13.5690305662 -15 14 27.388937323   15.1 12.219 13.4 10.208 M0Ve 16 0
23 CD-27 11363 TT* 17 00 34.9770095008 -27 38 04.402752406   11.67 10.88     K2Ve 34 0
24 EM* AS 218 TT* 17 07 12.2356680307 -27 13 37.503749743   13.296 12.166     K4Ve 16 1
25 BD-10 4662 TT* 18 20 22.74972 -10 11 13.6263   12.00 10.62 10.24 8.884 K5Ve+K7Ve 78 0
26 V* V721 CrA Or* 19 09 45.9199022548 -37 04 26.179628570   14.92 13.30     K6IVe 24 0
27 V* BZ Sgr Mi* 19 58 38.4891086955 -13 56 53.859659482     12.30     K0Ve 12 0

    Equat.    Gal    SGal    Ecl

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