A dataset provided by the European Space Agency

Name DISK_PTT
Title REMNANT DUSTY DISKS IN LINDROOS POST T TAURI (PTT) STARS
URL

http://nida.esac.esa.int/nida-sl-tap/data?RETRIEVAL_TYPE=OBSERVATION&PRODUCT_LEVEL=ALL&obsno=289013110

DOI https://doi.org/10.5270/esa-haa99yo
Author ZINNECKER, H F
Description the purpose of this proposal is to obtain isocam imaging observations of lindroos wide binary systems at two wavelengths (6.7mu and 15mu). lindroos binaries are physical systems consisting of an early-type main sequence primary and a late-type pre-main sequence(pms)secondary, typically a bright b-star with a faint k-star or g-star companion. these coeval pairs span a range of ages between 10 and 120 myr and a range of projected separations of 10 to 30 arcsec (1000-6000 au). the secondaries thus constitute a perfect sample of ptt stars, i.e. stars older than the weak-line t tauri stars but not yet on the zams. we have already used these systems to study the evolution of x-ray emission as a function of time (with the rosat hri) and now intend to use them in order to investigate how disk properties vary in the age gap between the t tauri phase and the zams. we have also tried to detect dust emission using ground-based facilities like the sest but could not detect it, since it is likely to be very weak. iso observations are of the order of 100 times more sensitive to to detect small amounts of micron-sized dust particles than ground-based observations and should thus allow us to probe the timescale for planet formation around solar-type stars near a more massive hot star, i.e. in a binary environment where additional dynamical and radiation effects may operate on the ptt star.s disk. we have 10/12 lindroos systems available for each launch window, some of which have been detected at 12 microns in the iras fsc. for these systems isocam imaging is especially rewarding, since we can resolve the iras emission and pinpoint its spatial distribution (is it dust emission from a remnant disk of the low-mass pms star, or is it photospheric emission from the brighter higher-mass star?) in these cases, additional 60 and 90 mu isophot photometry will be carried out (pht22_c100), in order to search for co...ld dust emission. we predict that some lindroos primaries will show the vega phenomenon.
Instrument CAM01 , PHT22
Temporal Coverage 1996-07-28T06:37:12Z/1996-12-06T23:33:20Z
Version 1.0
Mission Description The Infrared Space Observatory (ISO) was the world's 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.
Creator Contact https://support.cosmos.esa.int/iso/
Date Published 1999-04-08T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, ZINNECKER, H F, 1999, DISK_PTT, 1.0, European Space Agency, https://doi.org/10.5270/esa-haa99yo