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Title:
Speckle observations of the central region of NGC 4151
Authors:
Ayers, G. R.; Benson, J.; Carels, K.; Dyck, H. M.; Spillar, E.
Affiliation:
AA(Wyoming Infrared Observatory, Laramie), AB(Wyoming Infrared Observatory, Laramie), AC(Wyoming Infrared Observatory, Laramie), AD(Wyoming Infrared Observatory, Laramie), AE(Wyoming Infrared Observatory, Laramie)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 360, Sept. 10, 1990, p. 471-473. (ApJ Homepage)
Publication Date:
09/1990
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
GALACTIC NUCLEI, INFRARED SOURCES (ASTRONOMY), SEYFERT GALAXIES, SPECKLE INTERFEROMETRY, K STARS, M STARS, NEAR INFRARED RADIATION, SPATIAL RESOLUTION
DOI:
10.1086/169137
Bibliographic Code:
1990ApJ...360..471A

Abstract

Broad-band, near-infrared (1.65 and 2.2 micron) observations of the central region of NGC 4151 have been made using the technique of one-dimensional speckle interferometry. The region is clearly separable into a spatially compact central component surrounded by an extended component of different spectral character. Extended component fluxes are found to be consistent with a stellar population of late-K and early-M giants. An upper limit of 174 milliarcsec is found for the angular spatial extent of the compact region.

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