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More Images of Type Ia
1
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Illustration of Merger Trigger for Supernova
These illustrations shows the main way that new Chandra results indicate Type Ia supernova are triggered in elliptical galaxies. Two white dwarf stars orbit each other and lose energy via gravitational radiation, eventually resulting in a merger between the two stars. Because the total mass of this merger exceeds the weight limit for a white dwarf, the merged star is unstable and explodes as a Type Ia supernova.
View Animation
(Illustration: NASA/CXC/M.Weiss)

2
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Illustration of Alternate Trigger Mechanism
The top panel shows an artist's illustration of gas being pulled from a Sun-like star onto a white dwarf via a red disk. When the amount of material accreted onto the white dwarf causes the weight limit for this star to be exceeded, it explodes as a Type Ia supernova, as shown in the bottom panel. The latest results show that this is not the dominant mechanism for Type Ia supernovas in the galaxies Chandra observed.
(Illustration: NASA/CXC/M.Weiss)

3
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X-ray, Optical & IR Images of M31
This composite image of M31 (Andromeda) shows Chandra X-ray data in gold, optical data from the Digitized Sky Survey in light blue and infrared data from the Spitzer Space Telescope in red. A zoom into the central region of M31 dissolves into the Chandra field of view. Scientists have calculated that the Chandra image would be about 40 times brighter than observed if Type Ia supernova in the bulge of this galaxy were triggered by accretion of material from a normal star onto a white dwarf star. This implies that the merger of two white dwarfs is the main trigger for Type Ia supernovas in this galaxy.
(Credit: X-ray (NASA/CXC/MPA/M.Gilfanov & A.Bogdan), Infrared (NASA/JPL-Caltech/SSC), Optical (DSS))

4
X-ray, Optical & Infrared Composite Image of M32
New findings from NASA's Chandra X-ray Observatory have provided a major advance in understanding a type of supernova that is critical for studying the dark energy that astronomers think pervades the universe. The results show that the merger of two dense stellar remnants are the likely cause of many of the Type Ia supernovas that have been used to measure the accelerated expansion of the universe.

Fast Facts for M32:
Credit  X-Ray (NASA/CXC/MPA/M.Gilfanov & A.Bogdan), Infrared (2MASS/UMass/IPAC-Caltech/NASA/NSF), Optical (DSS)
Scale  30 arcmin on a side (about 25,000 light years across)
Category  Normal Galaxies & Starburst Galaxies
Coordinates (J2000)  RA 00h 42m 41.80s | Dec +40 51' 52.00"
Constellation  Andromeda
Observation Date  07/24/01, 07/28/01, 05/27/05
Observation Time  2 days
Obs. ID  2071, 2494, 5690
Color Code  X-ray (gold); IR (red); Optical (cyan)
Instrument  ACIS
Reference  M.Gilfanov and A.Bogdan, 2010, Nature, in press. A.Bogdan and M.Gilfanov, 2010, A&A, in press.
Distance Estimate  2.9 million light years
5
X-ray, Optical & Infrared Composite Image of M105


Fast Facts for M105:
Credit  X-Ray (NASA/CXC/MPA/M.Gilfanov & A.Bogdan), Infrared (2MASS/UMass/IPAC-Caltech/NASA/NSF), Optical (DSS)
Scale  30 arcmin on a side (about 332,000 light years across)
Category  Normal Galaxies & Starburst Galaxies
Coordinates (J2000)  RA 10h 47m 50.00s | Dec +12 34' 57.00
Constellation  Leo
Observation Date  5 pointings between Nov 2005 and Jan 2007
Observation Time  3 days 15 hours
Obs. ID  1587, 7073-7076
Color Code  X-ray (gold); Infrared (red); Optical (cyan)
Instrument  ACIS
Reference  M.Gilfanov and A.Bogdan, 2010, Nature, in press. A.Bogdan and M.Gilfanov, 2010, A&A, in press.
Distance Estimate  38 million light years
6
X-ray, Optical & Infrared Composite Image of NGC 3377


Fast Facts for NGC 3377:
Credit  X-Ray (NASA/CXC/MPA/M.Gilfanov & A.Bogdan), Infrared (2MASS/UMass/IPAC-Caltech/NASA/NSF), Optical (DSS)
Scale  30 arcmin on a side (about 288,000 light years across)
Category  Normal Galaxies & Starburst Galaxies
Coordinates (J2000)  RA 10h 47m 41.80s | Dec +13 59' 00.00
Constellation  Leo
Observation Date  01/03/06
Observation Time  9 hours 30 min
Obs. ID  2934
Color Code  X-ray (gold); Infrared (red); Optical (cyan)
Instrument  ACIS
Reference  M.Gilfanov and A.Bogdan, 2010, Nature, in press. A.Bogdan and M.Gilfanov, 2010, A&A, in press.
Distance Estimate  33 million light years
7
X-ray, Optical & Infrared Composite Image of NGC 3585


Fast Facts for NGC 3585:
Credit  X-Ray (NASA/CXC/MPA/M.Gilfanov & A.Bogdan), Infrared (2MASS/UMass/IPAC-Caltech/NASA/NSF), Optical (DSS)
Scale  30 arcmin on a side (about 567,000 light years across)
Category  Normal Galaxies & Starburst Galaxies
Coordinates (J2000)  RA 11h 13m 17.00s | Dec -26 45' 19.40
Constellation  Hydra
Observation Date  06/03/01, 03/11/08
Observation Time  1 day
Obs. ID  2078, 9506
Color Code  X-ray (gold); Infrared (red); Optical (cyan)
Instrument  ACIS
Reference  M.Gilfanov and A.Bogdan, 2010, Nature, in press. A.Bogdan and M.Gilfanov, 2010, A&A, in press.
Distance Estimate  65 million light years
8
X-ray, Optical & Infrared Composite Image of NGC 4278


Fast Facts for NGC 4278:
Credit  X-Ray (NASA/CXC/MPA/M.Gilfanov & A.Bogdan), Infrared (2MASS/UMass/IPAC-Caltech/NASA/NSF), Optical (DSS)
Scale  30 arcmin on a side (about 358,000 light years across)
Category  Normal Galaxies & Starburst Galaxies
Coordinates (J2000)  RA 12h 20m 06.80s | Dec +29 16' 51.00
Constellation  Coma Berenices
Observation Date  6 pointings between Feb 2005 and Feb 2007
Observation Time  5 days 3 hours
Obs. ID  4741, 7077-7081
Color Code  X-ray (gold); Infrared (red); Optical (cyan)
Instrument  ACIS
Reference  M.Gilfanov and A.Bogdan, 2010, Nature, in press. A.Bogdan and M.Gilfanov, 2010, A&A, in press.
Distance Estimate  41 million light years

9
M31 with Scale Bar
(Credit: X-ray (NASA/CXC/MPA/M.Gilfanov & A.Bogdan), Infrared (NASA/JPL-Caltech/SSC), Optical (DSS)

10
M32 with Scale Bar
(Credit: X-Ray (NASA/CXC/MPA/M.Gilfanov & A.Bogdan), Infrared (2MASS/UMass/IPAC-Caltech/NASA/NSF), Optical (DSS)

11
M105 with Scale Bar
(Credit: X-Ray (NASA/CXC/MPA/M.Gilfanov & A.Bogdan), Infrared (2MASS/UMass/IPAC-Caltech/NASA/NSF), Optical (DSS)

12
NGC 3377 with Scale Bar
(Credit: X-Ray (NASA/CXC/MPA/M.Gilfanov & A.Bogdan), Infrared (2MASS/UMass/IPAC-Caltech/NASA/NSF), Optical (DSS)

13
NGC 3585 with Scale Bar
(Credit: X-Ray (NASA/CXC/MPA/M.Gilfanov & A.Bogdan), Infrared (2MASS/UMass/IPAC-Caltech/NASA/NSF), Optical (DSS)

14
NGC 4278 with Scale Bar
(Credit: X-Ray (NASA/CXC/MPA/M.Gilfanov & A.Bogdan), Infrared (2MASS/UMass/IPAC-Caltech/NASA/NSF), Optical (DSS)


Type Ia (February 17, 2010)