SIMBAD references

2015ApJ...806L...9H - Astrophys. J., 806, L9 (2015/June-2)

Discovery of seven companions to intermediate-mass stars with extreme mass ratios in the Scorpius-Centaurus association.

HINKLEY S., KRAUS A.L., IRELAND M.J., CHEETHAM A., CARPENTER J.M., TUTHILL P., LACOUR S., EVANS T.M. and HAUBOIS X.

Abstract (from CDS):

We report the detection of seven low-mass companions to intermediate-mass stars (SpT B/A/F; 1.5-4.5 M) in the Scorpius-Centaurus (Sco-Cen) Association using nonredundant aperture masking interferometry. Our newly detected objects have contrasts 4-6, corresponding to masses as low as Å20 MJup and mass ratios of 0.01-0.08, depending on the assumed age of the target stars. With projected separations ρ Å=Å= 10-30 AU, our aperture masking detections sample an orbital region previously unprobed by conventional adaptive optics imaging of intermediate-mass Sco-Cen stars covering much larger orbital radii (Å30-3000 AU). At such orbital separations, these objects resemble higher-mass versions of the directly imaged planetary mass companions to the 10-30 Myr, intermediate-mass stars HR 8799, β Pictoris, and HD 95086. These newly discovered companions span the brown dwarf desert, and their masses and orbital radii provide a new constraint on models of the formation of low-mass stellar and substellar companions to intermediate-mass stars.

Abstract Copyright:

Journal keyword(s): instrumentation: adaptive optics - instrumentation: interferometers - planets and satellites: detection - techniques: high angular resolution

Simbad objects: 14

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2019.09.15-10:35:05

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