Spectral energy distribution of NGC 1275
Journal Article
·
· Publ. Astron. Soc. Pac., v. 87, no. 520, pp. 879-883
An analysis of absolute spectral energy distributions for NGC 1275 (Per A) covering the wavelength interval lambda lambda 3300--10,800 is presented. The data are consistent with the heavy reddening discovered by Wampler. The H $alpha$ intensity varied by less than 10 percent between the times of Wampler's earlier measurements and the two occasions of our observations. The line- emitting region has a characteristic density approximately 10$sup 4$$.$$sup 5$ cm$sup -3$, a mass approximately 10$sup 5$$.$$sup 5$M/sub solar mass/, and a volume filling factor approximately 10$sup -6$. The gas may be ionized by shock waves or by nonthermal or stellar radiation. It is again suggested, in the vein of Minkowski's original proposal, that the high-velocity, emission-line knots described by Minkowski are H II regions in a Perseus cluster galaxy or intergalactic gas cloud seen in projection against NGC 1275. (auth)
- Research Organization:
- Univ. of Texas, Austin
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-33-027067
- OSTI ID:
- 4008633
- Journal Information:
- Publ. Astron. Soc. Pac., v. 87, no. 520, pp. 879-883, Journal Name: Publ. Astron. Soc. Pac., v. 87, no. 520, pp. 879-883; ISSN PASPA
- Country of Publication:
- United States
- Language:
- English
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