2003A&A...410..803B


Query : 2003A&A...410..803B

2003A&A...410..803B - Astronomy and Astrophysics, volume 410, 803-812 (2003/11-2)

Stellar population gradient in lenticular galaxies: NGC 1023, NGC 3115 and NGC 4203.

BASSIN M. and BONATTO C.

Abstract (from CDS):

We investigate the stellar population content in the lenticular galaxies NGC 1023, NGC 3115 and NGC 4203 applying a population synthesis method based on a seven component spectral basis with different ages - 2.5x106, 10x106, 25x106, 75x106, 200x106, 1.2x109 and older than 1010years, and metallicity in the range -1.3≤[Z/Z]≤-0.2. This study employs two-dimensional STIS spectra in the range λλ2900-5700Å, obtained from the Hubble Space Telescope public archives. We extracted one-dimensional spectra in adjacent windows 100pc wide (projected distance) from the nuclear regions up to 300-400pc. The largest contribution, both in λ5870Å flux and mass fraction, comes from old stars (age>1010years). We verified the possible existence of circumnuclear bursts (CNBs) in NGC 3115 and NGC 4203.

Abstract Copyright:

Journal keyword(s): galaxies: elliptical and lenticular, cD - galaxies: stellar content - galaxies: nuclei

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 - 2022
#notes
1 NGC 1023 IG 02 40 24.0133575864 +39 03 47.663392896 10.91 10.35 9.35 7.83   ~ 634 2
2 2MASXI J0240377+390326 GiG 02 40 37.7 +39 03 29       14.52   ~ 43 1
3 NGC 3115 GiG 10 05 13.9270507008 -07 43 06.982712292   11   9.37   ~ 975 2
4 NGC 4203 LIN 12 15 05.0549203560 +33 11 50.383965120   12.98 11.99     ~ 475 2
5 NAME Leo Spur reg ~ ~           ~ 29 0

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2022.08.16-06:07:13

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