The near-infrared and ice-band variability of Haro 6-10

Details The near-infrared and ice-band variability of Haro 6-10 The near-infrared and ice-band variability of Haro 6-10

2001-02-02

arxiv.org/abs/astro-ph/0102042v1

Astronomy and Astrophysics

Astrophysics

8 pages, 6 Figures, Accepted for Publication in Astronomy & Astrophysics

Scientific paper

10.1051/0004-6361:20010111

We have monitored the angularly resolved near infrared and 3.1 micron ice-band flux of the components of the young binary Haro 6-10 on 23 occasions during the years 1988 to 2000. Our observations reveal that both the visible star Haro 6-10 (Haro 6-10S) and its infrared companion (Haro 6-10N) show significant variation in flux on time scales as short as a month. The substantial flux decrease of Haro 6-10S over the last four years carries the reddening signature of increased extinction. However, a comparable K-band flux increase observed in the IRC is associated with a dimming in the H-band and cannot be explained by lower extinction. Absorption in the 3.1 micron water-ice feature was always greater towards the IRC during our observations, indicating a larger amount of obscuring material along its line of sight. We detect variability in the ice-band absorption towards Haro 6-10S and Haro 6-10N, significant at the 3.5 sigma and 2.0 sigma levels, respectively.

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