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HST imaging of nearby CSOs: obscuration and nuclear structures
Stocke, J. T.; Conway, J. E.; Reynolds, C. +2 more
We present 3-band HST imaging of three nearby ( z<0.1) compact symmetric objects: 4C31.04, 1946+708 and 1146+596 (NGC 3894). These objects were chosen for HST observation on the basis of detected HI and molecular line absorption. The images show large amounts of obscuration in each source, well distributed throughout the host galaxies, but some…
Interactions between the Abell 2597 central radio source and dense gas in its host galaxy
Koekemoer, Anton M.; Baum, Stefi A.; O'Dea, Christopher P. +5 more
We present a detailed HST/WFPC2 study of the complex network of emission-line filaments and blue continuum emission associated with the lobes of the radio source at the center of the nearby strong cooling-flow cluster Abell 2597. This object is a prototypical "blue-lobed" cluster radio galaxy. We discuss ways in which the radio source is interacti…
HST NICMOS and WFPC2 observations of molecular hydrogen and dust in the central galaxies in cluster cooling flows
Mack, Jennifer; Donahue, Megan
We present preliminary results of HST imaging observations of three central galaxies in X-ray luminous clusters of galaxies with putative major cooling flows in their cores: NGC 1275 in the Perseus cluster, Abell 2597, and PKS 0745-19. Narrow-band NICMOS imaging at 2 microns reveals extended, warm ( T∼2000-3000 K) molecular hydrogen structures in …
The synchrotron spectrum of the M87 jet
Leahy, J. P.; Macchetto, F. D.; Sparks, W. B. +2 more
We present 1998 HST observations which yield the first single-epoch spectrum of the M87 jet from 0.3 to 2.0 microns. The flattest optical spectra ( αo∼0.6, where F ν ∝ ν -α; comparable to αro) are found in two inner jet knots which contain the fastest superluminal components. Other knots have somewhat st…