The Mid‐Infrared–emitting Dust around AB Aurigae | Zendy

Christine Chen | Zendy; M. Jura | Zendy

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The Mid‐Infrared–emitting Dust around AB Aurigae

Author(s) -

Christine Chen,

M. Jura

Publication year - 2003

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 - 10.1086/375265

Subject(s) - physics , astrophysics , millimeter , circumstellar dust , wavelength , astronomy , circumstellar disk , brightness , debris disk , infrared , surface brightness , circumstellar envelope , angular diameter , cosmic dust , stars , optics , planetary system , galaxy

Using the Keck I telescope, we have obtained 11.7 micron and 18.7 micronimages of the circumstellar dust emission from AB Aur, a Herbig Ae star. Wefind that AB Aur is probably resolved at 18.7 micron with an angular diameterof 1.2" at a surface brightness of 3.5 Jy/arcsec^2. Most of the dust massdetected at millimeter wavelengths does not contribute to the 18.7 micronemission, which is plausibly explained if the system possesses a relativelycold, massive disk. We find that models with an optically thick, geometricallythin disk, surrounded by an optically thin spherical envelope fit the datasomewhat better than flared disk models.Comment: ApJ in press, 4 color figure

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