Interferometer observations of subparsec-scale infrared emission in the nucleus of NGC 4151

被引：84

作者：

Swain, M

Vasisht, G

Akeson, R

Monnier, J

Millan-Gabet, R

Serabyn, E

Creech-Eakman, M

van Belle, G

Beletic, J

Beichman, C

Boden, A

Booth, A

Colavita, M

Gathright, J

Hrynevych, M

Koresko, C

Le Mignant, D

Ligon, R

Mennesson, B

Neyman, C

Sargent, A

Shao, M

Thompson, R

Unwin, S

Wizinowich, P

机构：

[1] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[2] CALTECH, Michelson Sci Ctr, Pasadena, CA 91125 USA

[3] Univ Michigan, Ann Arbor, MI 48109 USA

[4] Calif Assoc Res Astron, WM Keck Observ, Kamuela, HI 96743 USA

来源：

ASTROPHYSICAL JOURNAL | 2003年 / 596卷 / 02期

基金：

美国国家航空航天局;

关键词：

galaxies : individual (NGC 4151); galaxies : Seyfert; instrumentation : interferometers;

D O I：

10.1086/379235

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report novel, high angular resolution interferometric measurements that imply that the near-infrared nuclear emission in NGC 4151 is unexpectedly compact. We have observed the nucleus of NGC 4151 at 2.2 mum using the two 10 m Keck telescopes as an interferometer and find a marginally resolved source less than or equal to0.1 pc in diameter. Our measurements rule out models in which a majority of the K-band nuclear emission is produced on scales larger than this size. The interpretation of our measurement most consistent with other observations is that the emission mainly originates directly in the central accretion disk. This implies that active galactic nucleus unification models invoking hot, optically thick dust may not be applicable to NGC 4151.

引用

页码：L163 / L166

页数：4

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