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Titolo:
THE VISIBLE ENVIRONMENT OF POLAR RING GALAXIES
Autore:
BROCCA C; BETTONI D; GALLETTA G;
Indirizzi:
OSSERV ASTRON PADOVA,VICOLO OSSERVATORIO 5 I-35122 PADUA ITALY OSSERV ASTRON PADOVA I-35122 PADUA ITALY UNIV PADUA,DIPARTIMENTO ASTRON I-35122 PADUA ITALY
Titolo Testata:
Astronomy and astrophysics
fascicolo: 3, volume: 326, anno: 1997,
pagine: 907 - 914
SICI:
0004-6361(1997)326:3<907:TVEOPR>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
NEUTRAL HYDROGEN SURVEY; SEYFERT-GALAXIES; COMPANIONS;
Keywords:
GALAXIES, EVOLUTION; GALAXIES, FORMATION; GALAXIES, INTERACTIONS; GALAXIES, PECULIAR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
23
Recensione:
Indirizzi per estratti:
Citazione:
C. Brocca et al., "THE VISIBLE ENVIRONMENT OF POLAR RING GALAXIES", Astronomy and astrophysics, 326(3), 1997, pp. 907-914

Abstract

A statistical study of the environment around Polar Ring Galaxies is presented. Two kinds of search are performed: 1) a study of the concentration and diameters of all the objects surrounding the Polar Rings, within a search field 5 times the ring diameter. New magnitudes for polar ring galaxies are presented. 2) a search, in a wider field, for galaxies of similar size that may have encountered the polar ring host galaxy in a time of the order of 1 Gyr. Differently from the results ofsimilar searches in the fields of active galaxies, the environment ofthe Polar Ring Galaxies seems to be similar to that of normal galaxies. This result may give support to the models suggesting long times for formation and evolution of the rings. If the rings are old (and stable or in equilibrium), no traces of the past interaction are expected in their surroundings. In addition, the formation of massive polar rings, too big to derive from the ingestion of a present-day dwarf galaxy, may be easily placed in epochs with a higher number of gas-rich galaxies.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/12/20 alle ore 21:35:16