RX J0852.0-4622
| RX J0852.0-4622 or Vela Junior | |
|---|---|
| Observation data (Epoch J2000.0) | |
| Supernova type | SN |
| Remnant type | ? |
| Constellation | Vela |
| Right ascension | 08h 52m |
| Declination | -46° 22′ |
| Galactic coordinates | 286.9460 +42.4568 (34" W, 10" S) |
| Discovery date | 1998 |
| Peak magnitude (V) | ? |
| Distance | 700 ly |
| Physical characteristics | |
| Progenitor | ? |
| Progenitor type | ? |
| Colour (B-V) | ? |
| Notable features | Could be associated with PSR J0855-4644. central object in SNR RX J0852.0-4622 = AX J0851.9-4617. |
RX J0852.0-4622 (also known as G266.2−1.2) is a recently discovered supernova remnant. The remnant is located in the southern sky in the constellation Vela ("sail"), and sits (in projection) inside the much larger and older Vela Supernova Remnant. For this reason, RX J0852.0-4622 is often referred to as Vela Junior.
It was found in 1998[1] when gamma ray emissions from the decay of 44Ti nuclei were discovered using The Imaging Compton Telescope, (COMPTEL).
The distance to this object is controversial, but some scientists argue that the supernova remnant is only 650-700 light years away, and exploded comparatively recently (as seen from earth), perhaps within the last 800 years.
If the remnant is indeed young and nearby, its corresponding supernova should have been visible from the Earth in about the year 1250. One difficulty with this interpretation is that there are no contemporary written reports of any supernova at that time or in that part of the sky.
The central compact object (CCO) was discovered in 2001[2]. In the initial Chandra X-ray image and deeper images thereafter, no pulsations were detected from the compact remnant which is believed to be a neutron star.
[edit] References
- ^ Iyudin, A. F.; Schönfelder, V.; Bennett, K.; Bloemen, H.; Diehl, R.; Hermsen, W.; Lichti, G. G.; Van Der Meulen, R. D. et al. (1998). "Emission from 44Ti associated with a previously unknown Galactic supernova". Nature 396 (6707): 142. Bibcode 1998Natur.396..142I. doi:10.1038/24106.
- ^ Pavlov, G. G.; Sanwal, D.; Kızıltan, B. �L.; Garmire, G. P. (2001). "The Compact Central Object in the RX J0852.0−4622 Supernova Remnant". The Astrophysical Journal 559: L131. Bibcode 2001ApJ...559L.131P. doi:10.1086/323975.
- http://imagine.gsfc.nasa.gov/docs/ask_astro/answers/981112c.html Not seen in 1250 ?
- http://adsabs.harvard.edu/abs/2004astro.ph.10372I XMM-Newton observations of the supernova remnant RX J0852.0-4622/GRO J0852-4642
- Simbad
 |
This nebula-related article is a stub. You can help Wikipedia by expanding it. |
