==================================================================== ==> in this proposal, also more time is requested for cleinert.bittau ==================================================================== the current understanding is that the young t tauri stars are surrounded by circumstellar disks, the material of which coagulates into solid bodies within several ten million years as a first step for possible later planet formation. most young stars are binaries or multiple systems, and most binary t tauri stars have separations of the same order as the size assumed for the circumstellar disks of these stars (one hundred or several hundred au), which may interfere with the normal evolution of these disks. this proposal is to investigate a representative sample of t tauri binaries with separations ranging from less than one au to about 1000 au by means of multiband photometry from 3-200 micron. it is expected that interaction of the binary components with their circumstellar disks or their common circumbinary disk will reflect in the broad band energy distribution. by comparison with a sample of single stars (available in the isophot proposals by tom ray and steven beckwith on the evolution of disks around classical and weak-lined t tauri stars) we hope to see clear evidence for this interaction between the binary components and their disks and thus to provide necessary observational constraints for the interpretation of the dynamical evolution of these systems. the object list is taken from recent studies on the multiplicity of t tauri stars by simon et al.(1992), ghez et al.(1993), reipurth and zinnecker(1993) and leinert et al.(1993). our main selection criteria were to avoid confusion by neighboring t tauri stars and to avoid regions of strong cirrus emission. with this proposal we propose three additions to the guaranteed time proposal binary t tauri stars: 1. ask for additional time in order to measure all stars of the original proposal (photometry took quite more time than estimated before launch). 2. add objects from the spring list from the well studied taurus region 3. add spectrophotometry with phot-s for some of the brighter sources.
Instrument
PHT03 , PHT22 , PHT40
Temporal Coverage
1997-04-22T08:33:56Z/1997-09-25T05:03:48Z
Version
1.0
Mission Description
The Infrared Space Observatory (ISO) was the worlds first true orbiting infrared observatory. Equipped with four highly-sophisticated and versatile scientific instruments, it was launched by Ariane in November 1995 and provided astronomers world-wide with a facility of unprecedented sensitivity and capabilities for a detailed exploration of the Universe at infrared wavelengths.
European Space Agency, Leinert et al., 1998, 'SPECTRAL ENERGY DISTRIBUTION OF BINARY T TAURI STARS comma PART 1', 1.0, European Space Agency, https://doi.org/10.5270/esa-hgiwgqk
