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Titolo:
The fundamental plane of radio galaxies
Autore:
Bettoni, D; Falomo, R; Fasano, G; Govoni, F; Salvo, M; Scarpa, R;
Indirizzi:
Osserv Astron Padova, I-35122 Padua, Italy Osserv Astron Padova Padua Italy I-35122 on Padova, I-35122 Padua, Italy Ist Radioastron Bologna, Bologna, Italy Ist Radioastron Bologna Bologna Italy dioastron Bologna, Bologna, Italy Univ Bologna, Dipartimento Astron, I-40126 Bologna, Italy Univ Bologna Bologna Italy I-40126 imento Astron, I-40126 Bologna, Italy European So Observ, D-8046 Garching, Germany European So Observ GarchingGermany D-8046 erv, D-8046 Garching, Germany
Titolo Testata:
ASTRONOMY & ASTROPHYSICS
fascicolo: 2, volume: 380, anno: 2001,
pagine: 471 - 477
SICI:
1432-0746(200112)380:2<471:TFPORG>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
OPTICAL-SURFACE PHOTOMETRY; ELLIPTICAL GALAXIES; VELOCITY DISPERSIONS; KINEMATICS; STELLAR; SPECTROSCOPY; CLUSTERS; DATABASE; SAMPLE; SHAPE;
Keywords:
galaxies : general;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
42
Recensione:
Indirizzi per estratti:
Indirizzo: Bettoni, D Osserv Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy Osserv Astron Padova Vicolo Osservatorio 5 Padua Italy I-35122
Citazione:
D. Bettoni et al., "The fundamental plane of radio galaxies", ASTRON ASTR, 380(2), 2001, pp. 471-477

Abstract

We collected photometrical and dynamical data for 73 low red-shift (z <0.2) Radio Galaxies (LzRG) in order to study their Fundamental Plane (FP). For22 sources we also present new velocity dispersion data that complement the photometric data given in our previous study of LzRG (Govoni et al. 2000a). It is found that the FP of LzRG is similar to the one defined by non-active elliptical galaxies, with LzRG representing the brightest end of the population of early type galaxies. Since the FP mainly reflects the virial equilibrium condition, our result implies that the global properties of early{type galaxies (defining the FP) are not influenced by the presence of gas accretion in the central black hole. This is fully in agreement with the recent results in black hole demography, showing that virtually all luminous spheroidal galaxies host a massive black hole and therefore may potentiallybecome active. We confirm and extend to giant ellipticals the systematic increase of the mass-to-light ratio with galaxy luminosity.

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Documento generato il 04/12/20 alle ore 06:46:39