Puppis A Explained

Puppis A (Pup A) is a supernova remnant (SNR) about 100 light-years in diameter and roughly 6500–7000 light-years distant.^[1] Its apparent angular diameter is about 1 degree.^[2] The light of the supernova explosion reached Earth approximately 3700 years ago. Although it overlaps the Vela Supernova Remnant, it is four times more distant.

A hypervelocity neutron star known as the Cosmic Cannonball has been found in this SNR.

Puppis X-1

Puppis X-1 (Puppis A) was discovered by a Skylark flight in October 1971, viewed for 1 min with an accuracy ≥ 2 arcsec,^[3] probably at 1M 0821-426, with Puppis A (RA 08^h 23^m 08.16^s Dec -42° 41′ 41.40″) as the likely visual counterpart.

Puppis A is one of the brightest X-ray sources in the X-ray sky. Its X-ray designation is 2U 0821-42.

References

• "Puppis A: Chandra Reveals Cloud Disrupted By Supernova Shock", Chandra: NASA/CXC/GSFC/U.Hwang et al.; ROSAT: NASA/GSFC/S.Snowden et al., https://chandra.harvard.edu/photo/2006/puppisa/
• Simbad

See also

• List of supernova remnants

Notes and References

1. Web site: Puppis A . . 9 Dec 2011 . WISE Multimedia Gallery . NASA . 21 Nov 2014.
2. Milne . D. K. . Radio observations of the supernova remnants IC443 and Puppis A . 1971 . Aust. J. Phys. . 24 . 429 . 1971AuJPh..24..429M . 10.1071/PH710429 . 31 January 2024 .
3. Web site: Wiggin M . The Dome on Ball Hill – The RAE Observatory . December 2000 . dead . https://web.archive.org/web/20120227153520/http://www.astro.cardiff.ac.uk/sas/2000_02.pdf . 2012-02-27 .