Surprisingly Strong K-band Emission Found in Low-luminosity Active Galactic Nuclei
نویسندگان
چکیده
منابع مشابه
LINERs AS LOW-LUMINOSITY ACTIVE GALACTIC NUCLEI
Many nearby galaxies contain optical signatures of nuclear activity in the form of LINER nuclei. LINERs may be the weakest and most common manifestation of the quasar phenomenon. The physical origin of this class of objects, however, has been ambiguous. I draw upon a number of recent observations to argue that a significant fraction of LINERs are low-luminosity active galactic nuclei. AGN CENSU...
متن کاملLow Luminosity Radio Loud Active Galactic Nuclei
I review observational properties of low power radio loud AGN. High resolution VLBI observations allow the estimate of the jet velocity and orientation with respect to the line of sight and the determination of the Doppler factor. These data reveal rich structures, including two-sided jets and secondary components. New results on 1144+35, a giant radio source with superluminal motion are shown ...
متن کاملEvidence for Jet Domination of the Nuclear Radio Emission in Low-luminosity Active Galactic Nuclei
We present simultaneous, sub-arcsecond (≤ 50 pc) resolution 5 GHz, 8.4 GHz, and 15 GHz VLAa observations of a well-defined sample of sixteen low-luminosity active galactic nuclei (LLAGNs). The radio emission in most of these nuclei does not show the rising spectrum (0.2. s . 1.3, Lν ∝ νs) expected from thermal electrons in an advection dominated accretion flow (ADAF) with or without weak to mod...
متن کاملDo LINER 2 galaxies harbour low-luminosity Active Galactic Nuclei?
We use ROSAT HRI spatial data and ASCA spectral measurements for a sample of seven nearby, early type spiral galaxies, to address the question of whether a lowluminosity Active Galactic Nucleus (LLAGN) is present in galaxies that have a LINER 2 classification. The brightest discrete X-ray source in the ROSAT HRI observations is invariably found to be positionally coincident with the optical gal...
متن کاملThe Spectral Energy Distributions of Low-Luminosity Active Galactic Nuclei
As a step toward elucidating the physical conditions in nearby active galaxies, this paper presents spectral energy distributions (SEDs) of a sample of seven low-luminosity active galactic nuclei (AGNs). SEDs for four objects are presented for the first time (NGC 4261, NGC 4579, NGC 6251, and M84); the data for the remaining three (M81, M87, and NGC 4594) have been substantially updated compare...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2019
ISSN: 1538-4357
DOI: 10.3847/1538-4357/ab5798