SDSS WSRT (Josza et al.)

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SDSS
WSRT (Josza
et al.)
WHT spectrum (Jarvis et al.)
WIYN (Keel/Manning)
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Westerbork (Josza et al, ASTRON) Orange neutral
hydrogen emission (8x109 solar masses) Contours
20 cm continuum core/outflow
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Edge brightening interaction with an outflow?
Star-forming regions
The Hole
No radial or ionization structure around hole
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Star formation in Hannys Voorwerp
Low-ionization Ha Far-red continuum
O III/Ha
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Jet direction
Hubble Legacy Archive VI (S. Baum et al.)
Contours Ha from SARA 0.6m
Pure jet-induced star formation in Minkowskis
Object Near NGC 541, z0.018 4x SFR, 6x radio
power of IC 2497/ Voorwerp
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Dust patches near line to nucleus
IR peak closely matches VLBI core
Warped dusty arms
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Expanding loop crosscut in STIS spectra at Ha
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Ha O III
Continuum (STIS acquisition)
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Merger (probably not involving with the small,
symmetric spiral companion) releases H I tail
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Accretion fuels luminous AGN, radiation ionizes
part of H I tail
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Change in accretion launches expanding gas ring
from nucleus. Broad radio outflow launched as
well, eventually interacting with H I tail to
trigger star formatipn in densest/closest parts
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Dramatic drop in ionizing radiation, nucleus
becomes LINER, we see ionization echo as Voorwerp
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Transient source
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Westerbork (Josza et al, ASTRON) Orange neutral
hydrogen emission Contours 20 cm continuum
core/outflow
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ESO 2.2m
SARA 0.6m
Garland in Centaurus A emission-line filaments
along jet