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Kinematics of Young SNRs P. Frank Winkler, Middlebury College Conference on SNe, YITP, Kyoto 30 October 2013 Collaborators: Knox Long Steve Reynolds Rob Petre William Blair Brian Williams Satoru Katsuda Dan Milisavljevic Undergraduate Students: Adele Plunkett Karl Twelker Claudine Reith Guarav Gupta Jillian Garber
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Tuesday, October 29, 2013 Last Update:11:04 PM ET Betelgeuse Explodes as Supernova Gravitational Waves Detected Worldwide First Exploding Star in Milky Way for 400 Years Spectacular Star in Orion Visible in Pre-dawn Skies NOT!
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Kinematics of Young SNRs P. Frank Winkler, Middlebury College Conference on SNe, YITP, Kyoto 30 October 2013 Collaborators: Knox Long Steve Reynolds Rob Petre William Blair Brian Williams Satoru Katsuda Dan Milisavljevic Undergraduate Students: Adele Plunkett Karl Twelker Claudine Reith Guarav Gupta Jillian Garber
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Kinematics of Young SNRs G292.0+1.8: Core-collapse SNR, ~ 3000 years old; “Cas A’s older cousin” Similarities to other young C-C SNRs SN 1006: Type Ia SN, 1007 years old F. Winkler Kyoto, 2013 4 “Young” = < few thousand years Composition and/or kinematics hold traces of the explosion
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O-rich SNR G292.0+1.8 (MSH 11-54) Optical knots: pure ejecta: O, Ne, no H, almost no S X-ray emission enriched by heavy elements, except along central belt (Park 2002, 2004, 2007 — see Poster 60) Active pulsar and associated PWN (Hughes 2001, Camillo 2002) Distance ~6 kpc (Gaensler & Wallace 2003); Diameter ~8' => 15 pc PSR Park (2007) F. Winkler Kyoto, 2013 5 [O III] 5007
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Kinematics I: Proper Motions Proper motions from 7 epochs: 1986 - 2008 F. Winkler Kyoto, 2013 6 Continuum-subtracted [O III] image shows expansion center and proper motions of 67 filaments projected forward 1000 years (Winkler et al. 2009) Trajectories are ballistic: proper motion well correlated with distance from center
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Kinematics I: Proper Motions Above: 2’ x 2’ section of unsubtracted [O III] image shows PSR J1124-5916 Backwards extrapolation gives expansion center and age ~3000 years PSR transverse velocity = 440 km/s to SE (at 6 kpc) F. Winkler Kyoto, 2013 7
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Longslit and multi-fiber spectra from 1.5m and 4m telescopes at CTIO Doppler velocities for 93 spectroscopically distinct knots –1500 km/ s < V r < + 1800 km/s Gives a high-resolution 3-D picture of O-rich ejecta in G292 Results qualitatively similar to F-P spectra of Ghavamian 2005, extending to outer knots, and with higher resolution CTIO image credit: T. Abbott and NOAO/AURA/NSFF. Winkler Kyoto, 2013 8 Kinematics II: Doppler Mapping V r < – 300km/s V r > + 300 km/s |V r | < 300 km/s
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Fastest knots are distributed along broad, bipolar jets, roughly N-S Brightest knots are along "eastern spur” CTIO image credit: T. Abbott and NOAO/AURA/NSFF. Winkler Kyoto, 2013 9 Kinematics II: Doppler Mapping V r = – 1500km/s V r = + 1800 km/s V r ≈ 0 km/s
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CTIO image credit: T. Abbott and NOAO/AURA/NSFF. Winkler Kyoto, 2013 10 Kinematics II: Doppler Mapping Fastest knots are distributed along broad, bipolar jets, roughly N-S Brightest knots are along "eastern spur” PSR
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Blue = 0.5-7 keV (Park 07) Red = 24 m (dust, Ghavamian 2012) Green = [O III] [O III] 0.5 - 7 keV (Park 2007) 24 μm (Ghavamian 2012) Multiwavelength Relationship Dense circumstellar belt gives brightest X-rays, IR from dust Encounter with belt on East drives reverse shock into ejecta to give bright spur
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3 more C-C SNRs with bipolar jets/cones Cas A (Age ~ 340 yr) (Milisavljevic & Fesen 2013) 3C58 = SN 1181? (Fesen+ 2008) 1E0102.2–7219 (SMC, age ~2000 yr) (Vogt & Dopita 2010) And one that's different: Puppis A (age ~ 4000 yr) (Winkler+ 1988; J. Garber thesis) NS recoil measured: at 700 km/s (Becker+ 2012) CTIO image credit: T. Abbott and NOAO/AURA/NSFF. Winkler Kyoto, 2013 12 Other Core-Collapse SNR Examples Chandra HRI
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SN 1006 SN Ia remnant Synchrotron limbs Shocked ISM (primarily) Shocked Ejecta
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Chandra ACIS 2012 (PFW+ ApJ, submitted) SN 1006 SN Ia remnant
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Chandra ACIS 2003 (Cassam-Chenai 2008) SN 1006 SN Ia remnant
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Deep Hα image Faint emission surrounding shell Intriguing interior features
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Ejecta Bullets + Balmer Bowshocks Ejecta reaching outer boundary of shell (neutral H) Green = X-ray Red = Hα
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Large Scale Ejecta Inhomogeneities: X-ray equivalent-width maps Si concentrated in SE O, Mg in SE and central region Ne is mainly interstellar Previously seen from Suzaku by Uchida+ (2013), with lower resolution UV absorption spectra toward a few UV “light bulbs” also show front-back asymmetries in cold ejecta (e.g. Hamilton+ 2007; Winkler & Long 2005)
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Summary Optically emitting ejecta in G292 is loosely organized along bi-polar cones; spectra show O, Ne almost exclusively—almost no S or other O-burning products Broad bipolar outflows (jets?) are a common—but not universal—feature of core-collapse SNe SN 1006: ejecta show clear asymmeties on large scale (NW- SE, front-back) SN 1006 ejecta also show small-scale clumpiness (scales ~ 0.1-0.3 pc); some have reached the shell edge and show Balmer bowshocks from encountering neutral H. Origin: instabilities in explosion? Or subsequently via R-T instabilities? F. Winkler Kyoto, 2013 19
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EXTRA SLIDES F. Winkler Kyoto, 2013 20
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2010
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Kinematics I: Proper Motions For all knots, distance traveled from the common expansion center is well correlated with proper motion—signature of ballistic trajectories. Assuming un-decelerated expansion, radial velocity is proportional to distance from center along the line of sight. F. WinklerKyoto, 201322
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(a) (b) (c) (d) (e) [O III] 4959 5007 (b) 29 km/s (a) -1267 km/s (c) 1211 km/s (d) 482 km/s 1109 km/s (e) -341 km/s 27 km/s 986 km/s FWHM ≈ 360 km/s F. WinklerKyoto, 201323
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For Cas A, most ejecta knots lie near a spherical shell, plus jets of much faster material (Reed et al. 1995) Three-Dimensional Structure Do similar patterns persist in G292 (~ 10 x older)? Systemic velocity ~ + 770 km/s Fesen et al. 2006 F. Winkler Kyoto, 2013 24
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Outer Fast-Moving Knots (mostly) lie near a spherical shell? (GHW 05) More distant (faster) knots lie far outside posited shell to the South Systemic radial velocity is small (~ +100 km/s, GHW05) Three-Dimensional Structure F. Winkler Kyoto, 2013 25
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