Cannabaceae

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G299.2-2.9
Shell structure of G299.2-2.9
Event typeSupernova
SN Ia
Datec. 9500 BC
(discovered 1996)
ConstellationMusca
EpochJ2000
Distancec. 16,000 ly
RemnantMixed Morphology
HostMilky Way
Notable featuresComplex outer shell structure
Other designationsSNR G299.2-02.9
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[edit on Wikidata]

G299.2-2.9 is a supernova remnant in the Milky Way, 16,000 light years from Earth.[1] It is the remains of a Type Ia supernova.[2] The observed radius of the remnant shell translates to approximately 4,500 years of expansion,[3] making it one of the oldest observed Type Ia supernova remnants.[4]

Description

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G299.2-2.9 gives astronomers an opportunity to study how supernova remnants evolve and warp over time. G299.2-2.9 also provides a glimpse of the explosion that produced it. G299.2-2.9 is split into several distinct and different regions: an almost complete bubble interrupted only by a blow-out, a bright center, a complex "knot" region on the northeastern edge of the bubble structure and a diffuse emission extending beyond the main structure.[5] It has been heavily documented by multiple satellites and in-orbit telescopes, including the Hubble Space Telescope, Spitzer Telescope,[6] and Chandra.[7]

The small X-ray emission from the deep portions of G299.2-2.9 shows large quantities of iron and silicon,[8] which indicates that it is a remnant of a Type Ia supernova. The outer "shell" is large and complex, with a multi-shell structure. Outer shells similar to G299.2-2.9 are usually not associated with exploded stars.[9] Since theories about Type Ia supernovae assume they go off in a specified environment, detailed studies of the outer "shell" of G299.2-2.9 have helped astronomers[10] improve their understanding of the areas and situations where thermonuclear explosions occur.[11]

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  • Composite image using X-ray light from Chandra (orange) that has been overlaid on an infrared image from 2MASS.[12]
    Composite image using X-ray light from Chandra (orange) that has been overlaid on an infrared image from 2MASS.[12]
  • Red, green and blue represent low, medium and high-energy X-rays – Chandra.[12]
    Red, green and blue represent low, medium and high-energy X-rays – Chandra.[12]
  • Chandra X-ray Observatory – NASA.[12]
    Chandra X-ray Observatory – NASA.[12]

References

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  1. ^ Park, Sangwook; Slane, Patrick O.; Hughes, John P.; Mori, Koji; Burrows, David N.; Garmire, Gordon P. (2007-08-20). "Chandra X-Ray Study of Galactic Supernova Remnant G299.2-2.9". The Astrophysical Journal. 665 (2): 1173–1181. arXiv:0706.0524. Bibcode:2007ApJ...665.1173P. doi:10.1086/520105. ISSN 0004-637X.
  2. ^ "INSPIRE". inspirehep.net. Retrieved 2024-03-21.
  3. ^ Park, Sangwook; Slane, Patrick O.; Hughes, John P.; Mori, Koji; Burrows, David N.; Garmire, Gordon P. (2007-08-20). "Chandra X-Ray Study of Galactic Supernova Remnant G299.2–2.9". The Astrophysical Journal. 665 (2): 1173. arXiv:0706.0524. Bibcode:2007ApJ...665.1173P. doi:10.1086/520105. ISSN 0004-637X.
  4. ^ "Supernovas & Supernova Remnants | ChandraBlog | Fresh Chandra News". chandra.harvard.edu. Retrieved 2024-04-18.
  5. ^ "European Association for Astronomy Education » G299.2-2.9: A Middle-Aged Supernova Remnant". Retrieved 2024-03-21.
  6. ^ JPL/NASA. "Telescopes help solve ancient supernova mystery". phys.org. Retrieved 2024-04-18.
  7. ^ Institution, Smithsonian. "A Tour of G299.2-2.9". Smithsonian Institution. Retrieved 2024-04-18.
  8. ^ "Chandra :: Photo Album :: G299.2-2.9 :: October 12, 2011". chandra.harvard.edu. Retrieved 2024-03-21.
  9. ^ Studio, NASA Scientific Visualization (2011-04-27). "NASA Scientific Visualization Studio | Tycho's Supernova Remnant: NASA'S Chandra Finds New Evidence on Origin of Supernovas". NASA Scientific Visualization Studio. Retrieved 2024-04-18.
  10. ^ "SNRcat - G299.2-02.9". snrcat.physics.umanitoba.ca. Retrieved 2024-03-21.
  11. ^ Slane, Patrick; Vancura, Olaf; Hughes, John P. (1996). "A study of the evolutionary state of the supernova remnant G299.2-2.9". Astrophysical Journal. 465 (2 PART I): 840–844. Bibcode:1996ApJ...465..840S. doi:10.1086/177467. ISSN 0004-637X.
  12. ^ a b c "Chandra :: Photo Album :: G299.2-2.9 :: February 12, 2015". chandra.harvard.edu. Retrieved 2024-03-21.
source: https://en.wikipedia.org/wiki/G299.2-2.9

One thought on “Cannabaceae”

  1. Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
    View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction

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