Evidence for a BL Lac nucleus in Centaurus A

R. Morganti; R. A.E. Fosbury; R. N. Hook; A. Robinson; Z. Tsvetanov

doi:10.1093/mnras/256.1.1

Evidence for a BL Lac nucleus in Centaurus A

R. Morganti, R. A.E. Fosbury, R. N. Hook, A. Robinson, Z. Tsvetanov

Research output: Contribution to journal › Article › peer-review

46 Citations (Scopus)

Abstract

We present a detailed ionization map ([O III]γ5007/Hα) of the prominent emission-line filaments in the nearby radio galaxy Centaurus A. The map reveals striking ionization structure which, we argue, is best explained by ionizing photons arriving from the direction of the nucleus. This new evidence adds direct support to the conclusion of a recent study that the filaments are photoionized by a powerful radiation beam originating in the nucleus. We suggest that Centaurus A may harbour a misdirected BL Lac object, as predicted by unified schemes relating these objects to a parent population of FRI radio galaxies.

Original language	English
Pages (from-to)	1-5
Number of pages	5
Journal	Monthly Notices of the Royal Astronomical Society
Volume	256
Issue number	1
DOIs	https://doi.org/10.1093/mnras/256.1.1
Publication status	Published - 1992
Externally published	Yes

Keywords

BLLacertae objects: general
Galaxies: active
Galaxies: individual: Cen A
Galaxies: jets
Galaxies: nuclei

Access to Document

10.1093/mnras/256.1.1

Cite this

@article{4012679141bf4ca8bfd9c53e1ca35de5,

title = "Evidence for a BL Lac nucleus in Centaurus A",

abstract = "We present a detailed ionization map ([O III]γ5007/Hα) of the prominent emission-line filaments in the nearby radio galaxy Centaurus A. The map reveals striking ionization structure which, we argue, is best explained by ionizing photons arriving from the direction of the nucleus. This new evidence adds direct support to the conclusion of a recent study that the filaments are photoionized by a powerful radiation beam originating in the nucleus. We suggest that Centaurus A may harbour a misdirected BL Lac object, as predicted by unified schemes relating these objects to a parent population of FRI radio galaxies.",

keywords = "BLLacertae objects: general, Galaxies: active, Galaxies: individual: Cen A, Galaxies: jets, Galaxies: nuclei",

author = "R. Morganti and Fosbury, {R. A.E.} and Hook, {R. N.} and A. Robinson and Z. Tsvetanov",

note = "Publisher Copyright: {\textcopyright} Royal Astronomical Society.",

year = "1992",

doi = "10.1093/mnras/256.1.1",

language = "English",

volume = "256",

pages = "1--5",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "1",

}

TY - JOUR

T1 - Evidence for a BL Lac nucleus in Centaurus A

AU - Morganti, R.

AU - Fosbury, R. A.E.

AU - Hook, R. N.

AU - Robinson, A.

AU - Tsvetanov, Z.

N1 - Publisher Copyright: © Royal Astronomical Society.

PY - 1992

Y1 - 1992

N2 - We present a detailed ionization map ([O III]γ5007/Hα) of the prominent emission-line filaments in the nearby radio galaxy Centaurus A. The map reveals striking ionization structure which, we argue, is best explained by ionizing photons arriving from the direction of the nucleus. This new evidence adds direct support to the conclusion of a recent study that the filaments are photoionized by a powerful radiation beam originating in the nucleus. We suggest that Centaurus A may harbour a misdirected BL Lac object, as predicted by unified schemes relating these objects to a parent population of FRI radio galaxies.

AB - We present a detailed ionization map ([O III]γ5007/Hα) of the prominent emission-line filaments in the nearby radio galaxy Centaurus A. The map reveals striking ionization structure which, we argue, is best explained by ionizing photons arriving from the direction of the nucleus. This new evidence adds direct support to the conclusion of a recent study that the filaments are photoionized by a powerful radiation beam originating in the nucleus. We suggest that Centaurus A may harbour a misdirected BL Lac object, as predicted by unified schemes relating these objects to a parent population of FRI radio galaxies.

KW - BLLacertae objects: general

KW - Galaxies: active

KW - Galaxies: individual: Cen A

KW - Galaxies: jets

KW - Galaxies: nuclei

UR - http://www.scopus.com/inward/record.url?scp=85040227523&partnerID=8YFLogxK

U2 - 10.1093/mnras/256.1.1

DO - 10.1093/mnras/256.1.1

M3 - Article

AN - SCOPUS:85040227523

SN - 0035-8711

VL - 256

SP - 1

EP - 5

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 1

ER -

Evidence for a BL Lac nucleus in Centaurus A

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this