Galaxy formation and evolution

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The nuclear stellar cluster in NGC 1068

ASTROPHYS SPACE SCI 248:1-2 (1997) 225-234

Authors:

N Thatte, R Genzel, H Kroker, A Krabbe, LE TacconiGarman, R Maiolino, M Tecza

Abstract:

We present new near-infrared integral field spectroscopy and adaptive optics imaging of the nucleus of NGC 1068. Using the stellar CO absorption features in the H and K bands, we have identified a moderately extincted stellar core centered on the nuclear position and of intrinsic size similar to 50 pc. We show that this nuclear stellar core is probably 5-16 x 10(8) years in age and contributes at least 7% of the total nuclear luminosity of similar to 1 x 10(11) L..
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The peculiar motions of early-type galaxies in two distant regions .4. The photometric fitting procedure

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 109:1 (1997) 79-102

Authors:

RP Saglia, E Bertschinger, G Baggley, D Burstein, M Colless, RL Davies, RK McMahan, G Wegner
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The peculiar motions of early-type galaxies in two distant regions - III. The photometric data

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 292:3 (1997) 499-572

Authors:

RP Saglia, D Burstein, G Baggley, E Bertschinger, MM Colless, RL Davies, RK McMahan, G Wegner
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The shapes and ages of elliptical galaxies

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 285:1 (1997) L1-L4

Authors:

RS deJong, RL Davies
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The variable UV central spike of NGC 4552

ASTR SOC P 117 (1997) 545-549

Authors:

M Cappellari, D Burstein, LM Buson, SD Alighieri, L Greggio, A Renzini, J Funes, F Bertola

Abstract:

The nature of the UV-bright spike at the center of the otherwise normal galaxy NGC 4552 is investigated by means of both Hubble Space Telescope (HST) imaging (FOC) and spectroscopy (FOS). This central feature-which underwent a recent dramatic UV flare-provides a potential new tool for revealing the presence of massive black holes in normal galaxies. In particular the sub-arcsec FOS spectra of the nucleus suggest that NGC 4552 does harbor an object with mass M > 4 x 10(8) M. within the central 2 pc.
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