SIMBAD references

2012ApJ...753L..38B - Astrophys. J., 753, L38 (2012/July-2)

A likely close-in low-mass stellar companion to the transitional disk star HD 142527.

BILLER B., LACOUR S., JUHASZ A., BENISTY M., CHAUVIN G., OLOFSSON J., POTT J.-U., MULLER A., SICILIA-AGUILAR A., BONNEFOY M., TUTHILL P., THEBAULT P., HENNING T. and CRIDA A.

Abstract (from CDS):

With the uniquely high contrast within 0".1 (Δmag(L') = 5-6.5 mag) available using Sparse Aperture Masking with NACO at Very Large Telescope, we detected asymmetry in the flux from the Herbig Fe star HD 142527 with a barycenter emission situated at a projected separation of 88±5 mas (12.8 ±1.5 AU at 145 pc) and flux ratios in H, K, and L' of 0.016±0.007, 0.012 ±0.008, and 0.0086±0.0011, respectively (3σ errors), relative to the primary star and disk. After extensive closure-phase modeling, we interpret this detection as a close-in, low-mass stellar companion with an estimated mass of ∼0.1-0.4 M. HD 142527 has a complex disk structure, with an inner gap imaged in both the near and mid-IR as well as a spiral feature in the outer disk in the near-IR. This newly detected low-mass stellar companion may provide a critical explanation of the observed disk structure.

Abstract Copyright:

Journal keyword(s): brown dwarfs - circumstellar matter - planetary systems - stars: emission-line, Be - stars: low-mass

Simbad objects: 7

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2020.10.31-18:29:11

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