The Physical Nature of the Blue Objects in the Field of BD + 15° 2469 (Virgo Cluster) | Zendy

Abati L. E. | Zendy; Lorenz H. | Zendy

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The Physical Nature of the Blue Objects in the Field of BD + 15° 2469 (Virgo Cluster)

Author(s) -

Abati L. E.,

Lorenz H.

Publication year - 1984

Publication title -

astronomische nachrichten

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.394

H-Index - 63

eISSN - 1521-3994

pISSN - 0004-6337

DOI - 10.1002/asna.2113050302

Subject(s) - virgo cluster , astrophysics , physics , galaxy , quasar , stars , cluster (spacecraft) , field (mathematics) , astronomy , galaxy cluster , mathematics , computer science , pure mathematics , programming language

The physical nature of 277 ultraviolet excess objects of the third Asiago field (22 square degrees, 15 ≦ m pg ≦ 18, U–B ≦≦ ‐0.2) is investigated on the basis of objective prism plates. Most of them are stars, 8% are quasar candidates and 7% compact galaxies. The proportions of different kinds of objects changes with the magnitude and U–B colour index. The surface density of quasars is estimated to be between 0.5 Q/sq. deg. and 1.0 Q/sq. deg. for the UVX A 3 objects. The results of the A 3 field (located in the Virgo cluster of galaxies) statistically agree with the ones of the A 1 field, outside clusters of galaxies.

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