A microdensitometer tracing of a new elliptical galaxy in Cepheus.
Abstract
Results are reported for a photometric study of photographic plates of the very red object XP1 in Cepheus (1950 coordinates: right ascension 21 h 54 m 34 s, declination +75 deg 14 min 26 sec). The apparent red magnitude of XP1 is estimated to be 14.2 + or - 0.10. Isophotal maps and luminosity profiles are obtained along the two axes of the object. The object is found to have an elliptical shape, an elongated halo, a major axis oriented in the direction NE-SW, and symmetry between the two sides of the luminosity profiles of both axes. A total diameter of about 30 arsec is determined along with a mean axial ratio of 0.5. It is concluded that XP1 has the shape, structure, and luminosity profile of a normal elliptical galaxy of type E5 to E6.
- Publication:
-
Akademia Athenon Praktika
- Pub Date:
- 1978
- Bibcode:
- 1978AkAtP..52..620X
- Keywords:
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- Astronomical Photometry;
- Cepheus Constellation;
- Elliptical Galaxies;
- Galactic Structure;
- Microdensitometers;
- Astronomical Maps;
- Isophotes;
- Luminosity;
- Photographic Recording;
- Astronomy;
- Elliptical Galaxies:Photometry