MILLIMETER RADIO CONTINUUM EMISSIONS AS THE ACTIVITY OF SUPERMASSIVE BLACK HOLES IN NEARBY EARLY-TYPE GALAXIES AND LOW-LUMINOSITY ACTIVE GALACTIC NUCLEI

被引：35

作者：

Doi, Akihiro ^{[1
,2
]}

Nakanishi, Kouichiro ^{[3
]}

Nagai, Hiroshi ^{[3
]}

Kohno, Kotaro ^{[4
]}

Kameno, Seiji ^{[5
]}

机构：

[1] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Chuou Ku, Kanagawa 2525210, Japan

[2] Grad Univ Adv Studies, Dept Space & Astronaut Sci, Chuou Ku, Kanagawa 2525210, Japan

[3] Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan

[4] Univ Tokyo, Inst Astron, Tokyo 1810015, Japan

[5] Kagoshima Univ, Fac Sci, Dept Phys, Kagoshima 8900065, Japan

来源：

ASTRONOMICAL JOURNAL | 2011年 / 142卷 / 05期

关键词：

galaxies: active; galaxies: elliptical and lenticular; cD; galaxies: jets; radio continuum: galaxies; techniques: interferometric; SAGITTARIUS-A-ASTERISK; SPECTRAL ENERGY-DISTRIBUTIONS; REDSHIFT-DISTANCE SURVEY; DWARF SEYFERT NUCLEI; X-RAY-PROPERTIES; ELLIPTIC GALAXIES; FUNDAMENTAL PLANE; ACCRETION FLOWS; NGC; 4258; CHANDRA OBSERVATIONS;

D O I：

10.1088/0004-6256/142/5/167

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We conducted millimeter continuum observations for samples of nearby early-type galaxies (21 sources) and nearby low-luminosity active galactic nuclei (LLAGNs; 16 sources) at 100 GHz (lambda 3 mm) using the Nobeyama Millimeter Array (NMA). In addition, we performed quasi-simultaneous observations at 150 GHz (lambda 2 mm) and 100 GHz for five LLAGNs. Compact nuclear emissions showing flat or inverted spectra at centimeter-to-millimeter wavelengths were found in many LLAGNs and several early-type galaxies. Moreover, significant flux variability was detected in three LLAGNs. These radio properties are similar to Sgr A*. The observed radio luminosities are consistent with the fundamental plane of black hole activity that was suggested on the basis of samples with black hole masses ranging from 10 to 10(10) M-circle dot. This implies nuclear jets powered by radiatively inefficient accretion flows onto black holes.

引用

页数：11

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