Bibcode
Tapia, Mauricio; Persi, Paolo; Gómez, Mercedes; Roth, Miguel; Marenzi, Anna R.
Referencia bibliográfica
Memorie della Società Astronomica Italiana, v.76, p.422 (2005)
Fecha de publicación:
0
2005
Número de citas
0
Número de citas referidas
0
Descripción
We present deep IJHK_s and H_2 images of a region in the Chamaeleon I
dark cloud containing the very low-mass young object [KG2001]102, in an
attempt to search for multiplicity and molecular outflows in the
vicinity of this object. No low-velocity shocked structures were
detected on our H_2 image. The broad-band and narrow-band images show
that [KG2001]102 is composed of four objects within a radius of ˜
2 arcsec . The brightest component [KG2001]102 A shows near-IR excess
emission and its mass is estimated to be in the range 33 to 55 M_Jup.
Red spectra were obtained of the two fainter components B and C. The
spectrum of the former suggests a K7V spectral type while the spectrum
of component C is too noisy to allow a reliable classification but rules
out a late M-type. The three faint components (B, C and D) have IJHK
colors that suggest a much later spectral type, with extinctions similar
to other members of the cloud. The computed probability of finding
randomly a pair of field stars like [KG2001]102 AB is 1.5 ×
10-3 while for a triple optical system like [KG2001]102 ABC,
it would be 3.8 × 10-5 and more than an order of
magnitude lower for finding a quadruple system like this by chance
projection.