Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aj....109..164k&link_type=abstract
The Astronomical Journal (ISSN 0004-6256), vol. 109, no. 1669, p. 164-172
Astronomy and Astrophysics
Astronomy
50
Andromeda Galaxy, Brightness Distribution, Far Ultraviolet Radiation, Galactic Bulge, Satellite-Borne Photography, Ultraviolet Astronomy, Flux Density, Hubble Space Telescope, Luminosity
Scientific paper
Comparison of the Hubble Space Telescope (HST) far-UV and visible images of the nucleus of M31 deepens the mystery of the two brightness peaks recently discovered by Lauer et al. At 175 mm the brightest point is the optically fainter peak (P2) that is close to the dynamical center. The very center of P2 has a UV upturn that is much greater than that of the bulge light, while the UV upturn of the optically brighter but off-center P1 is very similar to that of its surroundings. The excess FUV radiation form P2 is closely confined to its center and has a total flux density of 3 micro-joules, a level that is less likely to come from stellar radiation than from a high-frequency extension of the radio source at the center of M31. A surrounding region of 1.8 pc radius has a somewhat smaller Uv upturn than the rest of the bulge, but there is some lingering possibility that this depression might be an artifact of our correction of the spherical aberration. Our improvement decomposition of the V image removes the need to postulate a dust lane near the center. We confirm that P1 is very compact, and we derive a luminosity for it similar to that found by Lauer et al. The implications of all of this are briefly discussed.
Crane Philippe
King Ivan R.
Stanford Spencer A.
No associations
LandOfFree
Far-UV properties of the nuclear region of M31 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Far-UV properties of the nuclear region of M31, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Far-UV properties of the nuclear region of M31 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1818324