1998A&A...339..113M


Query : 1998A&A...339..113M

1998A&A...339..113M - Astronomy and Astrophysics, volume 339, 113-122 (1998/11-1)

Using polarimetry to check rotation alignment in PMS binary stars. Principles of the method and first results.

MONIN J.-L., MENARD F. and DUCHENE G.

Abstract (from CDS):

We present a new method to use polarimetric measurements to estimate the relative orientations of the star+disk system in each component of Pre Main Sequence (PMS) T Tauri binary stars. The principles of the method are presented, together with a review of polarimetric data available in the literature on wide systems (8-40") in Taurus. We show that this method can be subject to a bias introduced by the interstellar polarization, but we find that in four sources that are not affected by this bias, the rotation axes of both components are preferentially parallel. We also find one system where the axes are clearly not parallel. Because it concerns wide binaries, this alignment is thought to result from initial binary formation itself rather than via a posteriori tidal interactions. The method is promising but requires the use of more accurate polarimeters. In order to test the possibility to study tighter systems, we have also obtained imaging polarimetric measurements and spectra for each components of closer binaries (<3.2"). Our first polarimetric measurements lack S/N, but the spectra of individual components of these close binaries provide information on their respective spectral types and their accretion rate through Hα equivalent widths and fluxes. We use these spectra to confirm the nature and the pairing tendency of the TTS under study. Implications on the binary formation mechanism are discussed.

Abstract Copyright:

Journal keyword(s): techniques: polarimetric - techniques: spectroscopic - stars: pre-main sequence - stars: binaries: close - circumstellar matter

Simbad objects: 29

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Number of rows : 29
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 2MASS J03542950+3203013 TT* 03 54 29.5045395048 +32 03 01.408753080   12.71 11.85     G0 49 0
2 2MASS J03543017+3203043 TT* 03 54 30.1717556400 +32 03 04.330870164   13.25 12.31     G5 50 0
3 2MASS J04034930+2610520 TT* 04 03 49.308 +26 10 52.03   15.99 14.52     M3.9 63 0
4 2MASS J04035084+2610531 TT* 04 03 50.8384989360 +26 10 53.016897864   15.57 14.17     M2.8 52 0
5 HD 283447 Or* 04 14 12.9261150912 +28 12 12.359055168 13.17 12.07 10.68 9.45 8.67 K3Ve 395 0
6 V* FM Tau Or* 04 14 13.5841955640 +28 12 49.168982592 14.44   13.80 13.64   M0/2e 202 0
7 LDN 1521D DNe 04 27 46.5 +26 18 52           ~ 215 0
8 V* DH Tau Or* 04 29 41.5525353432 +26 32 58.126559604 15.14 14.62 13.10 13.01   M1Ve 282 0
9 V* DI Tau Or* 04 29 42.4723379736 +26 32 49.128692676 16.39 15.20 13.60     M0Ve 203 0
10 V* UX Tau B TT* 04 30 03.5780086776 +18 13 49.476723060     11.51 13.33   M1Ve 68 0
11 V* UX Tau A TT* 04 30 03.9932216088 +18 13 49.469925504   12.92 11.15     K2Ve 339 0
12 V* UX Tau Or* 04 30 03.99626 +18 13 49.4355 11.23 11.84 10.80 9.83 9.05 K2Ve+M1Ve 331 0
13 V* DK Tau A * 04 30 44.2408811328 +26 01 24.734232948           K5Ve 254 0
14 V* DK Tau Or* 04 30 44.243376 +26 01 24.65328 13.32 14.59 13.05 12.08   K7e+K7e 310 0
15 V* HK Tau TT* 04 31 50.5715875272 +24 24 17.775307548 16.81 16.689 15.292     M0.5 319 1
16 V* V710 Tau Y*O 04 31 57.79 +18 21 37.9           ~ 157 0
17 V* V710 Tau B TT* 04 31 57.7918661040 +18 21 37.947126420   15.07 13.55 13.98   M0.5/1e 55 0
18 V* V710 Tau A TT* 04 31 57.8028713880 +18 21 34.732161936       13.87   M2/3e 161 0
19 V* FY Tau Or* 04 32 30.5784243120 +24 19 57.359889192 17.83 18.05 13.49 14.17   M0.1 107 0
20 V* FZ Tau Or* 04 32 31.7627107344 +24 20 03.056011548 16.15     15.04   M0 130 0
21 V* GH Tau Or* 04 33 06.2186830512 +24 09 33.584489856     13.20 12.59   M3Ve 176 0
22 V* V807 Tau Or* 04 33 06.6358574736 +24 09 54.977968116   12.10 11.21 11.18   K7 139 2
23 V* GI Tau Or* 04 33 34.0609697160 +24 21 17.068989852 14.34   13.70 12.15 11.06 K5Ve 267 1
24 V* GK Tau Or* 04 33 34.5630097872 +24 21 05.855136732 15.50   13.00 12.02 10.62 K7:Ve 287 0
25 V* HN Tau Or* 04 33 39.3629421552 +17 51 52.289234280   14.76 13.40 13.05   K5e 238 0
26 V* HP Tau Or* 04 35 52.7819078592 +22 54 23.156947512 17.39 14.9 14.90     K2-5e 201 1
27 CoKu HP Tau G3 TT* 04 35 53.4988337112 +22 54 09.005027328 18.21   14.8     M0.6 66 0
28 CoKu HP Tau G2 Or* 04 35 54.1535049648 +22 54 13.426506072 13.63 12.31 11.158 10.14 9.172 G2e 120 0
29 Haro 6-37 Or* 04 46 58.97952 +17 02 38.1948           K7e+M1e 110 0

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2022.05.22-00:34:30

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