Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...189.4903r&link_type=abstract
American Astronomical Society, 189th AAS Meeting, #49.03; Bulletin of the American Astronomical Society, Vol. 28, p.1338
Astronomy and Astrophysics
Astronomy
Scientific paper
Infrared companions to young stellar objects (YSOs) have been discovered in a number of sources. These companions are significantly redder than the "primary" component, but will often have a greater bolometric luminosity. Since one generally assumes that members of a binary system form at the same time, how is it that two objects separated by a projected distance of only a few hundred AU can have such strikingly different spectral energy distributions (SEDs)? In their review of infrared companions, Zinnecker & Wilking (1992, in Binaries as Tracers of Stellar Formation) offer three scenarios for the formation of such systems: 1) the members form coevally (within ~ 10(5) yr) but are of different masses, thus evolve at different rates; 2) the system is coeval, but the companion is viewed through the primary's circumstellar disk and thus suffers greater extinction; or 3) the members have similar evolutionary timescales but form at different times so that the younger component is still more deeply embedded. We have observed several of these systems with JPL's mid-infrared camera MIRLIN from 5-25 microns, including narrowband images through the 10 micron silicate feature. Two are high mass systems (S255-IRS1 and GL961), three are low mass Class I YSOs (Haro 6-10, HH43-IRS1, and SSV63), and two are T Tau stars (DK Tau and UZ Tau). The four brighter systems (S255, GL961, Haro 6-10, and SSV63) were detected over the whole wavelength range; in each case we find that the silicate feature is deeper in the companion, implying a higher line of sight optical depth. For all sources, we combine this new data with available near-infrared information in an effort to derive accurate SEDs and luminosities for all members of these systems. Finally, we discuss the implications of our observations for the three scenarios above.
Ressler Michael E.
Shure Mark A.
No associations
LandOfFree
Mid-Infrared Spectral Energy Distributions of YSO Infrared Companions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Mid-Infrared Spectral Energy Distributions of YSO Infrared Companions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mid-Infrared Spectral Energy Distributions of YSO Infrared Companions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-817135