SN 2008D

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SN 2008D
Sn2008hdani.gif
X-ray (left) and visible light (right) images of SN 2008D (1), and SN 2007uy (2).
Observation data (Epoch J2000)
Supernova type Ibc
Host galaxy NGC 2770
Constellation Lynx
Right ascension 09h 09m 30.55s
Declination +33° 08′ 20.81″
Galactic coordinates 191.5472 +42.1883
Discovery date January 9, 2008
Distance 27 Mpc (88 Mly)
Physical characteristics
Progenitor Unknown
Progenitor type Unknown
Colour (B-V) Unknown
Notable features First supernova detected by the X-rays released very early on in its formation.
SWIFT images galaxy NGC 2770 with SN 2007uy before SN 2008D, with X-ray view (left) and visible light (right).

SN 2008D is a supernova detected with NASA's Swift X-ray telescope. The explosion of the supernova precursor star, in the spiral galaxy NGC 2770 (88 million light years away (27 Mpc),[1] was detected on January 9, 2008, by Carnegie-Princeton fellows Alicia Soderberg and Edo Berger, and Albert Kong and Tom Maccarone independently using Swift.[1] They alerted eight other orbiting and ground-based observatories to record the event. This was the first time that astronomers have ever observed a supernova as it occurred.

The supernova was determined to be of Type Ibc. The velocities measured from SN2008D indicated expansion rates of more than 10,000 kilometers per second. The explosion was off-center, with gas on one side of the explosion moving outward faster than on the other. This was the first time the X-ray emission pattern of a supernova (which only lasted about five minutes) was captured at the moment of its birth. Now that it is known what X-ray pattern to look for, the next generation of X-ray satellites is expected to find hundreds of supernovae every year exactly when they explode, which will allow searches for neutrino and gravitational wave bursts that are predicted to accompany the collapse of stellar cores and the birth of neutron stars.

"Supernovae are the explosions of massive stars—stars more than 8 times the mass of the Sun—whose cores run out of nuclear fuel and collapse in on themselves to form a neutron star or a black hole. In the process they launch a powerful shock wave that blows up the star. Until now, observations of these objects have been of the aftermath, typically several days after the initial explosion." [2][3]

See also[edit]

References[edit]

  1. ^ a b Soderberg, Alicia; Berger, Edo; Page, K. L.; Schady, P.; Parrent, J.; Pooley, D.; Wang, X.-Y.; Ofek, E. O. et al. (2008), An extremely luminous X-ray outburst at the birth of a supernova, Nature 453 (7194): 469–474, arXiv:0802.1712, Bibcode:2008Natur.453..469S, doi:10.1038/nature06997, PMID 18497815 
  2. ^ Supernova birth seen for first time
  3. ^ Birth cry of a supernova

Coordinates: Sky map 09h 09m 30.55s, +33° 08′ 20.81″