1999AJ....117.2725S

Query : 1999AJ....117.2725S

1999AJ....117.2725S - Astron. J., 117, 2725-2735 (1999/June-0)

Young stellar nuclei in the lenticular galaxies. I. NGC 1023 and NGC 7332.

SIL'CHENKO O.K.

Abstract (from CDS):

As a result of bidimensional spectroscopy of the central parts of two nearby lenticular galaxies, NGC 1023 and NGC 7332, undertaken with the Multi-Pupil Field Spectrograph of the 6 m telescope of the Special Astrophysical Observatory, their chemically decoupled stellar nuclei are found to be substantially younger than the surrounding bulges: the mean age of the nuclear stellar populations is 7 Gyr in NGC 1023 and 2.5±0.5 Gyr in NGC 7332. The morphological analysis undertaken by Seifert & Scorza for NGC 7332 and by us for NGC 1023 has revealed a existence of separate circumnuclear stellar disks with the radius of 80 pc in NGC 1023 and of 400 pc in NGC 7332; probably, the intermediate-age stellar populations are related to these structures.

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Journal keyword(s): Galaxies: Nuclei - Galaxies: Individual: NGC Number: NGC 1023 - Galaxies: Individual: NGC Number: NGC 7332 - Galaxies: Evolution - Galaxies: Structure

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 NGC 1023 AG? 02 40 24.0133575864 +39 03 47.663392896 10.91 10.35 9.35 7.83   ~ 689 2
2 NGC 4216 AGN 12 15 54.444 +13 08 57.84 11.51 10.99 10.01     ~ 424 1
3 M 88 Sy2 12 31 59.1525062448 +14 25 13.148971824   14.33 13.18     ~ 843 1
4 NGC 4816 GiG 12 56 12.1508733240 +27 44 43.773192276 14.25 13.80 12.84     ~ 145 1
5 NGC 7332 GiP 22 37 24.5373044952 +23 47 53.830708800   12.0       ~ 391 0

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