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  The proper motion of the central compact object RX J0822-4300 in the supernova remnant Puppis A, Revisited

Mayer, M., Becker, W., Patnaude, D., Winkler, P. F., & Kraft, R. (2020). The proper motion of the central compact object RX J0822-4300 in the supernova remnant Puppis A, Revisited. The Astrophysical Journal, 899(2): 138. doi:10.3847/1538-4357/aba121.

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Mayer, Martin1, Author              
Becker, Werner1, Author              
Patnaude, Daniel, Author
Winkler, P. Frank, Author
Kraft, Ralph, Author
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1High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society, ou_159890              

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 Abstract: We present an improved proper motion measurement of the central compact object RX J0822-4300, located in the supernova remnant Puppis A. By employing a new data set taken in February 2019 by the High Resolution Camera aboard the Chandra X-ray Observatory, we approximately double the available temporal baseline for our analysis to slightly more than 19 years (7000 days). We correct for the astrometric inaccuracy of Chandra using calibrator stars with known optical positions that are detected in all observations. Thereby, we obtain absolute positions of RX J0822-4300 accurate to around 0.1'' and from these a new best estimate for its total proper motion of μtot=(80.4±7.7)masyr−1. For a remnant distance of 2 kpc, this corresponds to a projected kick velocity of (763±73)kms−1 at a position angle of ϕ0=(247.8±4.4)°. The proper motion measurement of RX J0822-4300 is used for discussing the kinematic age of Puppis A.

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 Dates: 2020-08-24
 Publication Status: Published online
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 Identifiers: DOI: 10.3847/1538-4357/aba121
Other: LOCALID: 3267013
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Title: The Astrophysical Journal
Source Genre: Journal
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Publ. Info: Bristol; Vienna : IOP Publishing; IAEA
Pages: - Volume / Issue: 899 (2) Sequence Number: 138 Start / End Page: - Identifier: ISSN: 0004-637X
CoNE: https://pure.mpg.de/cone/journals/resource/954922828215_3