Type 1 supernovae

What are the progenitors of the supernova type 1A explosion?

References

BINAS, 1986, Wolters-Noordhoff Groningen, (a)table 33b, p 66, (b) table 104, p 228 (c) table 7, p 17
Domínguez I, Höflich P, Straniero O, Ap J, 557, 279
Hoyle F and Fowler WA, 1960, ApJ, 132, 565
Kaplan, The physics of Stars, ???????????
Mazurek, 1973, Ap & Space sc., 23, 365
Minkowski, 1940, Pub A.S.P., 52, 206
Petschek A.G., 1990, Supernovae, Springer-Verlag New York Inc., Ch 1, 2, 3
Truran and Cameron, 1971, Ap and Sp. Sc, 14, 179
Wheeler, J.C. and Hansen, 1973, C., Ap & Space sc., 11, 373
Whelan John and Iben Icko Jr., 1973, ApJ, 186, 1007-1014

Illustrations

Introduction, planetary nebula; www.howstuffworks.com

Spectra, Figure 1..... Petschek, page 4

Figure 2..... Petschek, page 7

Figure 3..... Petschek, page 47

Figure 4..... Petschek, page 12

Spectra,	Figure 1.....	Petschek, page 4
	Figure 2.....	Petschek, page 7
	Figure 3.....	Petschek, page 47
	Figure 4.....	Petschek, page 12