2003ApJ...596L.163S

Query : 2003ApJ...596L.163S

2003ApJ...596L.163S - Astrophys. J., 596, L163-L166 (2003/October-3)

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

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 E.R., MENNESSON B., NEYMAN C., SARGENT A., SHAO M., THOMPSON R., UNWIN S. and WIZINOWICH P.

Abstract (from CDS):

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 µm using the two 10 m Keck telescopes as an interferometer and find a marginally resolved source ≤0.1 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.

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Journal keyword(s): Galaxies: Individual: NGC Number: NGC 4151 - Galaxies: Seyfert - Instrumentation: Interferometers

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 BD+35 2310 PM* 12 04 53.8530790704 +34 37 14.279318076       10.358   K4/5V 27 0
2 NGC 4151 Sy1 12 10 32.5759813872 +39 24 21.063527532   12.18 11.48     ~ 3938 2
3 HD 105925 PM* 12 11 25.0660223948 +43 33 39.776148783       9.5   G6 28 1
4 BD+40 2528 PM* 12 21 44.5364751024 +39 23 48.300623916       9.6   G8 23 0
5 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0

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