Optical Studies of Cassiopeia a. I. Proper Motions in the Optical Remnant
1970; IOP Publishing; Volume: 162; Linguagem: Inglês
10.1086/150681
ISSN1538-4357
AutoresSidney van den Bergh, William W. Dodd,
Tópico(s)Solar and Space Plasma Dynamics
Resumoview Abstract Citations (103) References (17) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Optical Studies of Cassiopeia a. I. Proper Motions in the Optical Remnant van den Bergh, Sidney ; Dodd, W. W. Abstract Sixteen 200-inch plates taken between 1951 and 1968 have been used to study the expansion of the optical remnant of Cas A. If it is assumed that no deceleration occurred, the explosion of this supernova took place in A.D. 1667 + 8 (m.e.). The position of the center of expansion is found to be ai = l 0.2, = +58032i18.9 + 3'.'1. No star brighter than V = 22.5 is visible within 8 standard deviations of this position. If values of A = 6.8 and D = 2.8 kpc are assumed, it follows that any remaining stellar remnant must be fainter than Al7 = +3.5. The optical remnant of Cas A is undergoing rapid changes. The average decay time scale for moving knots is found to be about 10 years. Publication: The Astrophysical Journal Pub Date: November 1970 DOI: 10.1086/150681 Bibcode: 1970ApJ...162..485V full text sources ADS | data products SIMBAD (1) Related Materials (7) Part 2: 1971ApJ...165..259V Part 3: 1971ApJ...165..457V Part 4: 1971ApJ...167..223P Part 5: 1976ApJS...32..351K Part 6: 1983ApJ...268..129V Part 7: 1985ApJ...293..537V Part 8: 1986ApJ...307..723V
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