emamajek on 30-Nov-2011 03:52:43 GMT about [T64] 6
Concerning [MMG98] RX J1612.6-1859 "a" and "b" in Martin et al.
(1998;
1998MNRAS.300..733M
).
This study did not include finder charts, magnitudes for the
companions, nor useful cross-identifications, so disentangling which
component is which is not entirely straightforward. I will give you my
interpretation.
Martin et al. (1998) lists the following properties for this binary:
RX J1612.6-1859a: K6, EW(Halpha)=-0.2A, EW(Li)=0.48+-0.06A, WTTS
RX J1612.6-1859b: M0, EW(Halpha)=-15A, EW(Li)=0.78+-0.07A, CTTS
WTTS = Weak-lined T Tauri star, CTTS = Classical T Tauri star, EW(Li)
= Equivalent width of Li I 6707 feature.
So "a" is hotter, and is a young star lacking accretion signatures.
"b" is cooler, and is a young star showing accretion signatures.
"a" seems to correspond to the bright young star ScoPMS 52 = Wa Oph 3,
a known weak-lined T Tauri star. 18" away from "a" is a common proper motion
companion which shows strong Halpha emission (as discovered by
The 1964, and unambiguously identified in their finder charts). So
I believe [T64] 6 = "b".
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