The Radio Properties of Composite LINER/H
                    <scp>ii</scp>
                    Galaxies

Filho, M.; Barthel, P. D.; Ho, Luis C.

doi:10.1086/341786

Cited by 39 publications

(11 citation statements)

References 56 publications

(149 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…LINER 2s have a lower detection rate than LINER 1s (38% versus 63%; see Table 1), but the same pattern is reflected almost exactly within the Seyfert population (detection rate 30% for type 2s versus 72% for type 1s). Transition objects, on the other hand, clearly differ, showing a markedly lower detection rate of only 16%, consistent with the 8.4 GHz survey of Filho, Barthel & Ho (2000, 2002a, 2006, where the detection rate is ∼ 25%. The statistical differences in the Hubble type distributions of the three AGN classes slightly complicate the interpretation of these results.…”

Section: Radio Coressupporting

confidence: 82%

“…To a sensitivity limit of P rad ≈ 10 18 − 10 20 W Hz −1 at 5 GHz, and a resolution of ∆θ = 1 ′′ , they found that none of the galaxies contains a compact radio core. The VLA study of Filho, Barthel & Ho (2000) also failed to detect radio cores in a more heterogeneous sample of 12 H II nuclei.…”

Section: Robustness and Completenessmentioning

confidence: 94%

“…′′ 15−2. ′′ 5) resolution (Filho, Barthel & Ho 2000, 2002a, 2006Nagar et al 2000Nagar et al , 2002Ho & Ulvestad 2001;Filho et al 2004;Krips et al 2007). Because the sensitivity, resolution, and observing frequency varied from study to study, each concentrating on different subclasses of objects, it is nontrivial to combine the literature results.…”

Section: Radio Coresmentioning

confidence: 99%

“…This extended component appears to be less prevalent in LINERs, although a definitive comparison must await a survey matched in resolution, sensitivity, and wavelength with that performed for the Seyferts (Ho & Ulvestad 2001). Higher resolution images on milliarcsecond scales do resolve elongated structures akin to subparsec-scale jets, but most of the power is concentrated in a compact, high-brightness temperature core (Bietenholz, Bartel & Rupen 2000;Ulvestad & Ho 2001b;Filho, Barthel & Ho 2002b; Anderson, Ulvestad & Ho 2004;Filho et al 2004;Krips et al 2007). The comprehensive summary presented in Nagar, indicates that the incidence of milliarcsecond-scale radio cores is similar for LINERs and Seyferts, but that subparsec-scale jets occur more frequently in LINERs.…”

Section: Radio Coresmentioning

confidence: 99%

“…Recall that this is a highly effective method to filter out weak AGNs ( § § 5.2, 5.3). Filho, Barthel & Ho (2000, 2002aFilho et al 2004) have systematically surveyed the full sample of Palomar transition objects using the VLA at 8.4 GHz. They find that ∼25% of the population contains arcsecond-scale radio cores.…”

Section: The Nature Of Transition Objects and A Unified View Of Llagnsmentioning

confidence: 99%

See 4 more Smart Citations

Nuclear Activity in Nearby Galaxies

2008

Annu. Rev. Astron. Astrophys.

Self Cite

1,123

104

1,195

View full text Add to dashboard Cite

A significant fraction of nearby galaxies show evidence of weak nuclear activity unrelated to normal stellar processes. Recent high-resolution, multiwavelength observations indicate that the bulk of this activity derives from black hole accretion with a wide range of accretion rates. The low accretion rates that typify most low-luminosity active galactic nuclei induce significant modifications to their central engine. The broad-line region and obscuring torus disappear in some of the faintest sources, and the optically thick accretion disk transforms into a three-component structure consisting of an inner radiatively inefficient accretion flow, a truncated outer thin disk, and a jet or outflow. The local census of nuclear activity supports the notion that most, perhaps all, bulges host a central supermassive black hole, although the existence of active nuclei in at least some late-type galaxies suggests that a classical bulge is not a prerequisite to seed a nuclear black hole.

show abstract

Section: Radio Coressupporting

confidence: 82%

Section: Robustness and Completenessmentioning

confidence: 94%

Section: Radio Coresmentioning

confidence: 99%

Section: Radio Coresmentioning

confidence: 99%

Section: The Nature Of Transition Objects and A Unified View Of Llagnsmentioning

confidence: 99%

See 3 more Smart Citations

Nuclear Activity in Nearby Galaxies

2008

Annu. Rev. Astron. Astrophys.

Self Cite

1,123

104

1,195

View full text Add to dashboard Cite

show abstract

A SAURON look at galaxy bulges

et al. 2004

View full text Add to dashboard Cite

Abstract.Kinematic and population studies show that bulges are generally rotationally flattened systems similar to lowluminosity ellipticals. However, observations with state-of-the-art integral field spectrographs, such as SAURON, indicate that the situation is much more complex, and allow us to investigate phenomena such as triaxiality, kinematic decoupling and population substructure, and to study their connection to current formation and evolution scenarios for bulges of early-type galaxies. We present the examples of two S0 bulges from galaxies in our sample of nearby galaxies: one that shows all the properties expected from classical bulges (NGC 5866), and another case that presents kinematic features appropriate for barred disk galaxies (NGC 7332).

show abstract

The nature of compact radio sources: the case of FR 0 radio galaxies

Baldi

2023

Astron Astrophys Rev

View full text Add to dashboard Cite

Radio-loud compact radio sources (CRSs) are characterised by morphological compactness of the jet structure centred on the active nucleus of the galaxy. Most of the local elliptical galaxies are found to host a CRS with nuclear luminosities lower than those of typical quasars, $$\lesssim 10^{42}\, \text{erg}\, \text{s}^{-1}$$ ≲ 10 42 erg s - 1 . Recently, low-luminosity CRSs with a LINER-like optical spectrum have been named Fanaroff–Riley (FR) type 0 to highlight their lack of substantially extended radio emission at kpc scales, in contrast with the other Fanaroff–Riley classes, full-fledged FR Is and FR II radio galaxies. FR 0s are the most abundant class of radio galaxies in the local Universe, and characterised by a higher core dominance, poorer Mpc-scale environment and smaller (sub-kpc scale, if resolved) jets than FR Is. However, FR 0s share similar host and nuclear properties with FR Is. A different accretion–ejection paradigm from that in place in FR Is is invoked to account for the parsec-scale FR 0 jets. This review revises the state-of-the-art knowledge about FR 0s, their nature, and which open issues the next generation of radio telescopes can solve in this context.

show abstract

The Radio Properties of Composite LINER/H ii Galaxies

Cited by 39 publications

References 56 publications

Nuclear Activity in Nearby Galaxies

Nuclear Activity in Nearby Galaxies

A SAURON look at galaxy bulges

The nature of compact radio sources: the case of FR 0 radio galaxies

Contact Info

Product

Resources

About