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Galactic bulges from Hubble Space Telescope NICMOS observations:: ages and dust

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 310:3 (1999) 703-716

Authors:

RF Peletier, M Balcells, RL Davies, Y Andredakis, A Vazdekis, A Burkert, F Prada
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Ground-based detection of circumnuclear Keplerian disks of ionized gas in early-type disk galaxies

(1999) 232-236

Authors:

JG Funes, F Bertola, M Cappellari, EM Corsini, A Pizzella, JCV Beltran

Abstract:

We demonstrate the possibility of detecting mass concentrations (down to the level of 5 x 10(7) M.) in the center of galaxies with ground-based optical telescopes properly equipped, using Keplerian gaseous disks as probes. We predict that the high spatial resolution of HST equipped with STIS will allow to detect central mass concentrations down to the level of 5 x 10(6) M.. As a consequence, the detection of low mass concentrations in the range 10(6) - 10(7) M. will constitute a very appropriate use of HST.
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Integral field 3D spectroscopy: Techniques and prospects

ASTR SOC P 188 (1999) 303-313

Authors:

N Thatte, F Eisenhauer, M Tecza, S Mengel, R Genzel, G Monnet, D Bonaccini

Abstract:

The technique of integral field spectroscopy,: which provides simultaneous spectra for each pixel of a contiguous two-dimensional field of view, holds tremendous promise for improving our ability to study circumstellar environments. The technique becomes especially important at near infrared wavelengths, where rapid changes in the night sky background level limit the use of standard scanning techniques. In addition, combining the capabilities of adaptive optics systems with near infrared integral field spectrographs provides an unique way to enhance-spatial resolution for ground based observations. We present the technique of integral field spectroscopy, with special emphasis on the near infrared, and illustrate future developments by describing SINFONI, an adaptive optics assisted near infrared integral field spectrometer for the ESO VLT.
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Kinematically decoupled bulges in spirals: NGC 4698

ASTR SOC P 182 (1999) 241-242

Authors:

M Sarzi, EM Corsini, M Cappellari, JG Funes, F Bertola, JCV Beltran, A Pizzella
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LUCIFER - LBT NIR spectroscopic utility with camera and integral-field unit for extragalactic research

ASTR SOC P 188 (1999) 321-329

Authors:

H Mandel, I Appenzeller, W Seifert, W Xu, T Herbst, R Lenzen, N Thatte, R Lemke, D Bomans, H Nicklas, P Weiser

Abstract:

We propose to build a NIR imager/spectrograph for the LET which will support (1) seeing and diffraction limited direct imaging, (2) seeing and diffraction limited long-slit spectroscopy, (3) integral field spectroscopy and (4) tin small fields) OH-suppressed imaging of very faint objects. The instrument will cover the zJHK spectral bands with optimization for the K band. Therefore the optics will be cold (77 K). Whether the wavelength coverage can be extended to 5 mu without seriously compromising the K-band performance will be investigated during the design phase. At present a 2048 x 2048 HgCdTe array is foreseen as detector. Space will be reserved for the possibility of adding a (cold) multiple object spectroscopy unit. The feasibility of such a device will be investigated in parallel to the development of the main instrument. Six German institutes will cooperate to develop this LBT instrument.
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