SDSS WSRT (Josza et al.) - PowerPoint PPT Presentation

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SDSS WSRT (Josza et al.)

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... radiation ionizes part of H I tail Change in accretion launches expanding gas ring from nucleus. ... parts Dramatic drop in ionizing radiation, nucleus ... – PowerPoint PPT presentation

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Title: SDSS WSRT (Josza et al.)


1
SDSS
WSRT (Josza
et al.)
WHT spectrum (Jarvis et al.)
WIYN (Keel/Manning)
2
Westerbork (Josza et al, ASTRON) Orange neutral
hydrogen emission (8x109 solar masses) Contours
20 cm continuum core/outflow
3
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4
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5
Edge brightening interaction with an outflow?
Star-forming regions
The Hole
No radial or ionization structure around hole
6
Star formation in Hannys Voorwerp
Low-ionization Ha Far-red continuum
O III/Ha
7
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
8
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9
Dust patches near line to nucleus
IR peak closely matches VLBI core
Warped dusty arms
10
Expanding loop crosscut in STIS spectra at Ha
11
Ha O III
Continuum (STIS acquisition)
12
Merger (probably not involving with the small,
symmetric spiral companion) releases H I tail
13
Accretion fuels luminous AGN, radiation ionizes
part of H I tail
14
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
15
Dramatic drop in ionizing radiation, nucleus
becomes LINER, we see ionization echo as Voorwerp
16
Transient source
17
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18
Westerbork (Josza et al, ASTRON) Orange neutral
hydrogen emission Contours 20 cm continuum
core/outflow
19
ESO 2.2m
SARA 0.6m
Garland in Centaurus A emission-line filaments
along jet
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