Abstract
J H K L L′ & nbM photometry of B5 IRS1 in 1992 and 1993 shows that this low-mass YSO continues to fade in the near-infrared at an average rate of about 0.24 mag per year, and that by 1993 September the J to K luminosity had fallen to one-third of its 1988 December value. The change in luminosity continues to be virtually colour-independent between J and K, although the K –M colour is increasing with time. The changes are consistent with an increase in extinction by a dust population depleted of grains with radii smaller than ~0.4 μm, or with the short-wavelength emission (λ ≲ 3 µm) being dominated by light scattered in a changing circumstellar geometry.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callSimilar Papers
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
