Precise orbit solution of MML 53, a low-mass, pre-main sequence eclipsing binary in Upper Centaurus Lupus

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Table 2

Results of MML 53 orbit solution.

Parameter	Value

P [d]^a	2.097891(6) ± 0.000005
T₀ [HJD]^a	2454301.3252(7) ± 0.002
e	0 (fixed)
q ≡ M₂/M₁	0.863 ± 0.011^b ± 0.012^c
v_γ [km s^-1]	+1.4 ± 0.3^b ± 0.8^c
asini [R_⊙]	8.404 ± 0.057^b ± 0.066^c
M_totsin³i [M_⊙]	1.812 ± 0.033^b ± 0.040^c
M₁sin³i [M_⊙]	0.973 ± 0.019^b ± 0.022^c
M₂sin³i [M_⊙]	0.839 ± 0.016^b ± 0.019^c

Notes.

^(a)

Adopted from photometry;

^(b)

formal statistical error from the best-fit orbit solution;

^(c)

systematic uncertainty from spot-induced variations in the primary.

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