2002A&A...385....1S


Query : 2002A&A...385....1S

2002A&A...385....1S - Astronomy and Astrophysics, volume 385, 1-13 (2002/4-1)

Chemically distinct nuclei and circumnuclear rings in lenticular galaxies NGC 4429 and NGC 7013.

SIL'CHENKO O.K. and AFANASIEV V.L.

Abstract (from CDS):

The central regions of the regular lenticular galaxies NGC 4429 and NGC 7013 have been studied with the Multi-Pupil Field (Fiber) Spectrograph (MPFS) of the 6m telescope of the Special Astrophysical Observatory RAS (Nizhnij Arkhyz, Russia) in two spectral ranges, the blue one including the strong absorption lines MgI and FeI and the red one including the emission lines Hα and [NII]λ6583. We confirm the presence of the chemically distinct nucleus in NGC 7013 reported earlier. Besides this unresolved (in the magnesium index) structure, we have found a ring of younger stellar populations than those in the nucleus and in the bulge; the radius of this ring is about 6" (400pc). A similar ring, distinguished by high magnesium- and iron-index values and bordered by Hα emission at its inner edge, with a radius of 6" (500pc), is found in NGC 4429. We try to relate the ringed structure of the chemically decoupled cores in these galaxies with past, now dissolved, large-scale bars whose remnants are now seen in NGC 4429 and NGC 7013 as lenses between the bulges and global disks. An analysis of the gas and star kinematics in the centers of the galaxies has revealed the presence of an inclined circumnuclear disk in NGC 7013 and the existence of minibar in NGC 4429.

Abstract Copyright:

Journal keyword(s): galaxies: individual: NGC 4429 - galaxies: individual: NGC 7013 - galaxies: nuclei - galaxies: stellar content - galaxies: kinematics and dynamics - galaxies: evolution

Simbad objects: 14

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Number of rows : 14
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 615 GiG 01 35 05.6880367176 -07 20 24.841575348   12.8   11.43 12.2 ~ 133 0
2 NGC 1023 IG 02 40 24.0133575864 +39 03 47.663392896 10.91 10.35 9.35 7.83   ~ 634 2
3 NGC 2841 LIN 09 22 02.6778711696 +50 58 35.737082868 10.43 10.09 9.22     ~ 1030 1
4 * n Leo SB* 11 15 51.8801100552 +13 18 27.234958860 7.61 6.52 5.32     K2III 150 0
5 NGC 4138 Sy1 12 09 29.8011417048 +43 41 06.864140004 12.46 12.29 11.32 10.82   ~ 381 1
6 NGC 4429 GiG 12 27 26.5040002440 +11 06 27.588767616   11.4       ~ 298 0
7 M 64 SyG 12 56 43.696 +21 40 57.57   9.36 8.52     ~ 881 2
8 NGC 5533 Sy2 14 16 07.7507477232 +35 20 37.879981584   13.0       ~ 160 1
9 NGC 6340 GiP 17 10 24.8346254376 +72 18 15.919996608   11.87 11.01     ~ 182 1
10 NGC 7013 G 21 03 33.5698770000 +29 53 50.926694208   12.9       ~ 133 0
11 NGC 7217 LIN 22 07 52.3984675584 +31 21 33.632293572   12.94 11.92     ~ 476 0
12 NGC 7280 GiP 22 26 27.5758899936 +16 08 53.421593496   13.6       ~ 154 0
13 NGC 7331 LIN 22 37 04.0506038088 +34 24 56.800076508 10.65 10.35 9.48     ~ 1174 2
14 NGC 7332 GiP 22 37 24.5373044952 +23 47 53.830708800   12.0       ~ 363 0

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2022.08.09-04:18:02

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