Three-Dimensional Kinematics of the Supernova Remnant Puppis A

Details Three-Dimensional Kinematics of the Supernova Remnant Puppis A Three-Dimensional Kinematics of the Supernova Remnant Puppis A

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21545410g&link_type=abstract

American Astronomical Society, AAS Meeting #215, #454.10; Bulletin of the American Astronomical Society, Vol. 42, p.469

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We present proper-motion and radial-velocity studies of ejecta-dominated filaments in the young core-collapse SNR Puppis A. Using CCD images from CTIO at seven epochs 1989-2008, we have measured proper motions for dozens of ejecta-dominated knots. While the results appear qualitatively similar to our 1988 proper-motion study based on photographic plates (Winkler et al., IAU Colloq. 101), the current study--the first to use CCD data--includes many more filaments and spans a longer baseline to give far more precise values. We find proper motions as large as 0.22 arcsec/yr, equivalent to a transverse velocity of 2100 km/s at the 2 kpc distance to Puppis A. Like the previous study, the current one shows almost all the ejecta knots are expanding from a central location into the NE quadrant of the SNR. The direction is generally opposite to that of the unresolved central X-ray source RX J0822-4300, whose motion to the SW at >1200 km/s has been interpreted as the recoil of a compact remnant from the explosion (Hui & Becker, 2006 A & A; Winkler & Petre, 2007 ApJ).
In addition, we have measured radial velocities for dozens of knots, based on spectra from the long-slit RC spectrograph on the CTIO 1.5m telescope and from the Hydra multi-object spectrograph on the Blanco 4m. This sample shows radial velocities from -1600 km/s to +1000 km/s. If we assume undecelerated expansion of all the knots from a common center, the radial velocities are equivalent to position along the line of sight, so we can construct a 3-dimensional model for the structure and kinematics of Puppis A's ejecta. We discuss the implications of the observed kinematics for core-collapse supernovae and the kicks they give to neutron stars they produce.
This work is supported by the NSF through grant AST-0908566.

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