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SN 2005df

2005 supernova event in the constellation Reticulum

Field	Value
name	SN 2005df
image	File:Supernova 2005dh and Spiral Galaxy NGC 1559.jpg
image_size	300px
caption	SN 2005df is visible as the bright star just above the galaxy at center
event_type	Supernova
class	Type Ia
start_time	August 4, 2005 (UTC)
constellation	Reticulum
ra
dec
epoch	J2000
gal	l = 274.49°, b = −41.2°
distance	12.59 ±
redshift	0.0043
host	NGC 1559
progenitor_type	white dwarf
notes	First supernovae observed in NGC 1559 since 1986; brightest of 2005.
peak	12.3

| b-v = SN 2005df was a Type Ia supernova in the barred spiral galaxy NGC 1559, which is located in the southern constellation of Reticulum. The event was discovered in Australia by Robert Evans on the early morning of August 5, 2005 with a 13.8 magnitude, and was confirmed by A. Gilmore on August 6. The supernova was classified as Type Ia by M. Salvo and associates. It was positioned at an offset of east and north of the galaxy's nucleus, reaching a maximum brightness of 12.3 on August 18. The supernova luminosity appeared unreddened by dust from its host galaxy.

The progenitor was a carbon-oxygen white dwarf close to the Chandrasekhar limit, making a merger scenario unlikely. Modelling of the explosion shows a low central density for a hydrogen accretion scenario, suggesting the donating companion was a helium star or a tidally-disrupted white dwarf. Alternatively, the progenitor may have undergone some form of central mixing.

References

| display-authors=1 | date=2008

| access-date=2021-12-02 }}

| display-authors=1 | last1=Salvo | first1=M.

| display-authors=1 | last1=Gerardy | first1=Christopher L.

| display-authors=1 | last1=Diamond | first1=Tiara R.

| display-authors=1 | journal=The Astronomical Journal

Info: Wikipedia Source

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