SN 2005gl
Encyclopedia
SN 2005gl was a supernova
in the barred-spiral galaxy NGC 266. It was discovered using CCD frames taken October 5, 2005, from the 60 cm automated telescope at the Puckett Observatory in Georgia, and reported by Tim Puckett in collaboration with Peter Ceravolo. It was independently identified by Yasuo Sano in Japan.
The supernova was located 29.8″ east and
16.7″ north of the galactic core. Based upon its spectrum, this was classfied as a Type IIn
core-collapse supernova. It has a redshift
of z = 0.016, which is the same as the host galaxy.
Using archived images from the Hubble Space Telescope
, a candidate progenitor star was identified. This is believed to be a luminous blue variable
(LBV), similar to Eta Carinae, with an absolute magnitude
of −10.3 and a surface temperature of about 13,000 K. However, there is a small probability that the source was instead located in a compact cluster of stars
.
Supernova
A supernova is a stellar explosion that is more energetic than a nova. It is pronounced with the plural supernovae or supernovas. Supernovae are extremely luminous and cause a burst of radiation that often briefly outshines an entire galaxy, before fading from view over several weeks or months...
in the barred-spiral galaxy NGC 266. It was discovered using CCD frames taken October 5, 2005, from the 60 cm automated telescope at the Puckett Observatory in Georgia, and reported by Tim Puckett in collaboration with Peter Ceravolo. It was independently identified by Yasuo Sano in Japan.
The supernova was located 29.8″ east and
16.7″ north of the galactic core. Based upon its spectrum, this was classfied as a Type IIn
Type II supernova
A Type II supernova results from the rapid collapse and violent explosion of a massive star. A star must have at least 9 times, and no more than 40–50 times the mass of the Sun for this type of explosion. It is distinguished from other types of supernova by the presence of hydrogen in its spectrum...
core-collapse supernova. It has a redshift
Redshift
In physics , redshift happens when light seen coming from an object is proportionally increased in wavelength, or shifted to the red end of the spectrum...
of z = 0.016, which is the same as the host galaxy.
Using archived images from the Hubble Space Telescope
Hubble Space Telescope
The Hubble Space Telescope is a space telescope that was carried into orbit by a Space Shuttle in 1990 and remains in operation. A 2.4 meter aperture telescope in low Earth orbit, Hubble's four main instruments observe in the near ultraviolet, visible, and near infrared...
, a candidate progenitor star was identified. This is believed to be a luminous blue variable
Luminous blue variable
Luminous blue variables, also known as S Doradus variables, are very bright, blue, hypergiant variable stars named after S Doradus, the brightest star of the Large Magellanic Cloud. They exhibit long, slow changes in brightness, punctuated by occasional outbursts in brightness during substantial...
(LBV), similar to Eta Carinae, with an absolute magnitude
Absolute magnitude
Absolute magnitude is the measure of a celestial object's intrinsic brightness. it is also the apparent magnitude a star would have if it were 32.6 light years away from Earth...
of −10.3 and a surface temperature of about 13,000 K. However, there is a small probability that the source was instead located in a compact cluster of stars
Star cluster
Star clusters or star clouds are groups of stars. Two types of star clusters can be distinguished: globular clusters are tight groups of hundreds of thousands of very old stars which are gravitationally bound, while open clusters, more loosely clustered groups of stars, generally contain less than...
.