Photometry of the central region of the Andromeda Nebula

Journal Article · Thu May 01 00:00:00 EDT 1980 · Sov. Astron. (Engl. Transl.); (United States)

OSTI ID:5652314

Sharov, A S; Liutyi, V M

The photoelectric U, B, V observations of the central region of M81 made in 166 fields at distances of 54-351 arcsec from the center are used to explain the structure of the central condensation of the galaxy. The surface-brightness isophotes can be fit by ellipses varying in axial ratio from 0.9 to 0.6 and in position angle from 70 to 45 deg. The central condensation may include a bar in the form of a triaxial ellipsoid the nucleus occupies an asymmetric position in this condensation, shifted by 22 arcsec northwest relative to the most distant U isophote at a 368 arcsec. The apparent eccentricity with respect to the outlying isophotes is caused by distribution of dust, as shown by the colorimetric B - V, U - B color-index profiles reflecting the dust in the central condensation of M31.

• Research Organization: Moskovskii Gosudarstvennyi Universitet, Moscow, USSR
• OSTI ID: 5652314
• Journal Information: Sov. Astron. (Engl. Transl.); (United States), Vol. 24; Other Information: Translated from Astron. Zh.; 57: 449-464(May 1980)
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
GALAXIES
PHOTOMETRY
BRIGHTNESS
COSMIC DUST
DISTRIBUTION
GALAXY NUCLEI
DUSTS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
640105* - Astrophysics & Cosmology- Galaxies