Open AccessNICMOS Observations of the Pre–Main-Sequence Planetary Debris System HD 98800
Author(s) -
F. J. Low,
Dean C. Hines,
Glenn Schneider
Publication year - 1999
Publication title -
the astrophysical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.376
H-Index - 489
eISSN - 1538-4357
pISSN - 0004-637X
DOI - 10.1086/312145
Subject(s) - physics , astrophysics , luminosity , black body radiation , interplanetary dust cloud , debris , spectral energy distribution , astronomy , radius , albedo (alchemy) , planetary system , photometry (optics) , solar system , spectral line , stars , optics , galaxy , computer security , radiation , meteorology , computer science , art , performance art , art history
Spectral energy distributions (SEDs) from 0.4 to 4.7 microns are presentedfor the two principal stellar components of HD~98800, A and B. The third majorcomponent, an extensive planetary debris system (PDS), emits > 20% of theluminosity of star B in a blackbody SED at 164 +/- 5K extending from mid-IR tomillimeter-wavelengths. At 0.95 microns a preliminary upper limit of < 0.06 isobtained for the ratio of reflected light to the total from star B. This resultlimits the albedo of the PDS to < 0.3. Values are presented for thetemperature, luminosity, and radius of each major systemic component.Remarkable similarities are found between the PDS and the interplanetary debrissystem around the Sun as it could have appeared a few million years after itsformation.Comment: LaTeX, 9 pages with 1 encapsulated postscript figure and one specially formatted Table which is rendered as a postscript file and included as a figure. Accepted for publication in Astrophysical Journal Letter
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