Deceleration in the Expansion of SN 1993J | Zendy

J. M. Marcaide | Zendy; A. Alberdi | Zendy; E. Ros | Zendy; P. J. Diamond | Zendy; I. I. Shapiro | Zendy; J. C. Guirado | Zendy; Dayton L. Jones | Zendy; F. Mantovani | Zendy; M. Á. Pérez-Torres | Zendy; R. A. Preston | Zendy; R. T. Schilizzi | Zendy; R. A. Sramek | Zendy; C. Trigilio | Zendy; Schuyler D. Van Dyk | Zendy; K. W. Weiler | Zendy; A. R. Whitney | Zendy

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Deceleration in the Expansion of SN 1993J

Author(s) -

J. M. Marcaide,

A. Alberdi,

E. Ros,

P. J. Diamond,

I. I. Shapiro,

J. C. Guirado,

Dayton L. Jones,

F. Mantovani,

M. Á. Pérez-Torres,

R. A. Preston,

R. T. Schilizzi,

R. A. Sramek,

C. Trigilio,

Schuyler D. Van Dyk,

K. W. Weiler,

A. R. Whitney

Publication year - 1997

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/310830

Subject(s) - very long baseline interferometry , ejecta , supernova , physics , astrophysics , wavelength , astronomy , angular resolution (graph drawing) , optics , mathematics , combinatorics

A rarity among supernova, SN 1993J in M81 can be studied with high spatialresolution. Its radio power and distance permit VLBI observations to monitorthe expansion of its angular structure. This radio structure was previouslyrevealed to be shell-like and to be undergoing a self-similar expansion at aconstant rate. From VLBI observations at the wavelengths of 3.6 and 6 cm in theperiod 6 to 42 months after explosion, we have discovered that the expansion isdecelerating. Our measurement of this deceleration yields estimates of thedensity profiles of the supernova ejecta and circumstellar material in standardsupernova explosion models.Comment: to appear in Astrophysical Journal Letters 10 pages of text, three figures (two of them in postscript format, one in gif format

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