SIMBAD references

2015ApJ...801....4W - Astrophys. J., 801, 4 (2015/March-1)

New extinction and mass estimates from optical photometry of the very low mass brown dwarf companion CT Chamaeleontis B with the Magellan AO system.

WU Y.-L., CLOSE L.M., MALES J.R., BARMAN T.S., MORZINSKI K.M., FOLLETTE K.B., BAILEY V., RODIGAS T.J., HINZ P., PUGLISI A., XOMPERO M. and BRIGUGLIO R.

Abstract (from CDS):

We used the Magellan adaptive optics system and its VisAO CCD camera to image the young low mass brown dwarf companion CT Chamaeleontis B for the first time at visible wavelengths. We detect it at r', i', z', and YS. With our new photometry and Teff∼ 2500 K derived from the shape of its K-band spectrum, we find that CT Cha B has AV= 3.4±1.1 mag, and a mass of 14-24 MJ according to the DUSTY evolutionary tracks and its 1-5 Myr age. The overluminosity of our r' detection indicates that the companion has significant Hα emission and a mass accretion rate ∼6x10–10 M/yr, similar to some substellar companions. Proper motion analysis shows that another point source within 2'' of CT Cha A is not physical. This paper demonstrates how visible wavelength adaptive optics photometry (r', i', z', YS) allows for a better estimate of extinction, luminosity, and mass accretion rate of young substellar companions.

Abstract Copyright:

Journal keyword(s): brown dwarfs - instrumentation: adaptive optics - planetary systems - planets and satellites: individual: CT Cha B - stars: individual: CT Cha - stars: pre-main sequence

Simbad objects: 13

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2021.03.01-09:16:56

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