Trifid reflection nebulae

Journal Article · Sat Nov 01 04:00:00 EST 1986 · Astron. J.; (United States)

DOI:https://doi.org/10.1086/114242· OSTI ID:6689685

Lynds, B T; Oneil, Jr, E J

CCD frames of reflected starlight in the blue continuum, 4693 A, associated with the Trifid emission nebulae have been used to deduce the optical depth, albedo, and phase function of the dust grains. The northern component of the Trifid, centered on the supergiant HD 164514, apparently has grains of higher albedo than those associated with the southern O star HD 164492A. IRAS data add further arguments to the assumption that the northern reflection nebula is illuminated by the supergiant, and that the dust grains surrounding the O star have a higher grain temperature. The entire complex is probably part of the Sgr OB I association and the short lifetime of the association puts constraints on the manner in which the properties of the grains can be modified by associated young stars. 26 references.

• Research Organization: Kitt Peak National Observatory, Tucson, AZ
• OSTI ID: 6689685
• Journal Information: Astron. J.; (United States), Journal Name: Astron. J.; (United States) Vol. 92; ISSN ANJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC DUST
COSMIC GASES
DUSTS
FLUIDS
GASES
GIANT STARS
INTERSTELLAR GRAINS
NEBULAE
PARTICLES
STARS
SUPERGIANT STARS