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Record Details

Record 7 of 8
Copernicus observations of Nova Cygni 1975
External Online Source: doi:10.1086/155035
Author and Affiliation:
Jenkins, E. B.(Johns Hopkins Univ., Baltimore, MD, United States)
Snow, T. P.(Johns Hopkins Univ., Baltimore, MD, United States)
Upson, W. L.(Princeton University, New Observatory, Princeton, N.J., United States)
Anderson, R.(Johns Hopkins University, Baltimore, Md., United States)
Starrfield, S. G.(Johns Hopkins Univ., Baltimore, MD, United States)
Gallagher, J. S.(Johns Hopkins Univ., Baltimore, MD, United States)
Friedjung, M.(Johns Hopkins Univ., Baltimore, MD, United States)
Linsky, J. L.(Johns Hopkins Univ., Baltimore, MD, United States)
Henry, R. C.(Johns Hopkins Univ., Baltimore, MD, United States)
Moos, H. W.(Johns Hopkins Univ., Baltimore, MD, United States)
Abstract: Near-ultraviolet radiation from Nova Cygni 1975 was detected by the Copernicus satellite on five occasions from 1975 September 1 to 1975 September 9. The nova was not seen in the UV after this date. The principal result was the observation of a broad emission feature from the Mg II doublet at 2800 A. The absence of strong UV radiation at shorter wavelengths suggests that these lines are produced by collisional excitation in the outer layers of an expanding shell with electron temperature of approximately 4000 K. The absence of observed emission lines from highly ionized species indicates that the amount of material with log T between 4.4 and 5.7 is less than 0.001 times that which produces the Mg II emission. The continuum flux in the near-UV decreased as the nova evolved, showing that the total luminosity decreased as the nova faded in the visible.
Publication Date: Feb 15, 1977
Document ID:
19770041396
(Acquired Dec 01, 1995)
Accession Number: 77A24248
Subject Category: ASTROPHYSICS
Document Type: Journal Article
Publication Information: Astrophysical Journal; vol. 212
Publisher Information: United States
Contract/Grant/Task Num: NAS5-1810; NAS5-23274; NSF MPS-75-12845; NSF AST-73-05271-A01; NGR-06-003-057
Financial Sponsor: NASA; United States
Organization Source: Johns Hopkins Univ.; Baltimore, MD, United States
Princeton Univ. Observatory; NJ, United States
Description: 5p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: NOVAE; OAO 3; STELLAR SPECTROPHOTOMETRY; ULTRAVIOLET SPECTRA; ASTROPHYSICS; SATELLITE OBSERVATION; STELLAR ENVELOPES
Imprint And Other Notes: Astrophysical Journal, Part 1, vol. 212, Feb. 15, 1977, p. 198-202.
Miscellaneous Notes: Feb. 15, 1977, p. 198-202
Availability Source: Other Sources
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