منابع مشابه
IRAC Colors of Young Stellar Objects
We compare the infrared colors predicted by theoretical models of protostellar envelopes and protoplanetary disks with initial observations of young stellar objects made with the Infrared Array Camera (IRAC) on the Spitzer Space Telescope (Werner et al. 2004, Fazio et al. 2004). Disk and envelope models characterized by infall and/or accretion rates found in previous studies can quantitatively ...
متن کاملInfrared Colors at the Stellar / Substellar Boundary
We present new infrared JHK photometry for 61 halo and disk stars around the stellar/substellar boundary. We also present new L ′ photometry for 21 of these stars and for 40 low–mass stars taken from the Leggett 1992 photometry compilation. These data are combined with available optical photometry and astrometric data to produce color–color and absolute magnitude–color diagrams — the current sa...
متن کاملPotential colors for determining age and metallicity of stellar populations
Context. Colors are usually not used for constraining stellar populations because they are thought to have the well-known agemetallicity degeneracy. But some recent works show that colors can also be used. The simple stellar population (SSP) synthesis model of Bruzual & Charlot (2003) (BC03) is widely used but there is no analysis for its colors. Aims. We try to find colors which can potentiall...
متن کاملInfrared Array Camera (irac) Colors of Young Stellar Objects
We compare the infrared colors predicted by theoretical models of protostellar envelopes and protoplanetary disks with initial observations of young stellar objects made with the Infrared Array Camera ( IRAC) on the Spitzer Space Telescope. Disk and envelope models characterized by infall and/or accretion rates found in previous studies can quantitatively account for the range of IRAC colors fo...
متن کاملModeling the Appearance of Fluorescent Colors
The advent of improved durability pigments has resulted in the increased use of fluorescent colored materials in safety and warning applications (e.g., high-priority traffic signs; safety vests). Yet, little is known about the relationship between the visual effectiveness of fluorescent colored materials and their photometric properties. Archival data sets were reanalyzed to assess the appropri...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2009
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/200912205