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NICMOS observations of two classic AGNS
Thompson, Rodger I.; Corbin, Michael
High Resolution WFPC2 Imaging of IRAS 09104 + 4109
Armus, L.; Soifer, B. T.; Neugebauer, G.
With a infrared luminosity of nearly 10^13 Lsuns, IRAS 09104+4109 is the most luminous galaxy with z<0.5 in the IRAS All Sky Survey. A radio-loud Seyfert 2 type optical spectrum, a cD host galaxy in a rich cluster, and a massive cooling flow make IRAS 09104+4109 unique among ultraluminous infrared galaxies. Cannibalized cluster members and the …
Young and Old Galaxies at High Redshift
Windhorst, R.; Waddington, I.; Cohen, S. +2 more
We review the results from recent deep HST imaging on faint galaxies. Artificial Neural Networks (ANNs) were used to classify faint galaxies based on surface brightness and light profiles. We use available UV + ground-basedU-band images of nearby galaxies to address the effects from the uncertain red shifted UV-morphology on the classifications, r…
The Role of Nuclear Starbursts in Luminous Infrared Seyfert 2 Galaxies
Heckman, Timothy; González Delgado, Rosa M.
We present HST (WFPC2 and FOC) images and UV GHRS spectra plus ground-based optical spectra of four Luminous Infrared Galaxies (LIRGs) that have Seyfert 2 nuclei (Mrk 477, NGC 7130, NGC 5135 and IC 3639). The data provide direct evidence of the existence of a central nuclear starburst that dominates the UV and optical light and are dusty and compa…
Ultra-Luminous IR Galaxies at Low and High Redshift
Scoville, Nick
In the luminous infrared galaxies, nuclear starbursts and active nuclei are fueled by extraordinarily large masses of gas and dust concentrated at radii of a few hundred pc by galactic merging and viscous accretion. The nearby ULIRGS are probably excellent analogs of galaxies seen at high redshift during the epoch of galaxy formation and growth. W…
Hubble Space Telescope WFPC2 Color-Magnitude Diagram of NGC 6287
Stetson, P. B.; Kellar Fullton, L.; Carney, B. W.
Galaxies at High Redshift
Illingworth, Garth
Within just the last few years, we have advanced from knowing only a few galaxies at z>2 to having redshifts for nearly 1000 z ∼ 2–5objects. The majority of this sample has been detected through the photometric `drop-out' technique used so successfully by Steidel and his collaborators. In addition, a handful of objects have already been detecte…
The Origin of QSO Mg II λ 2796 Lines
Danks, A. C.
We have started a systematic spectroscopic survey of stars in the η Carina nebula using the echelle mode of the Space Telescope Imaging Spectrograph (STIS). The Mg II λ2796/λ2803 lines seen in our R ∼ 100000, spectra of the star CPD–59° 2603 show a remarkable similarity with the intervening Mg II system seen in QSO absorption spectra. S…
NICMOS observations of luminous & ultraluminous infrared galaxies
Evans, Aaron S.
HST NICMOS observations of a sample of 24 luminous (LIGs: LIR[8-1000 µm] = 1011.0-11.99 L⊙) and ultraluminous (ULIGs:LIR ≳ 1012.0 L⊙) infrared galaxies are presented.The observations provide, for the first time, high resolution HST imagingof the imbedded 1.1 - 2.2 µm nuc…
HST Observations of Abell 2125: Radio Emission and the Butcher-Oemler Effect
Owen, F. N.; Keel, W. C.; Ledlow, M. J. +1 more