The spectrum and luminosity of the low-redshift QSO 0241+622

Abstract

view Abstract Citations (26) References (30) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The spectrum and luminosity of the low-redshift QSO 0241+622. Margon, B. ; Kwitter, K. B. Abstract Spectrophotometry of 0241+622, the stellar low-redshift emission-line object associated with the faint X-ray source 4U 0241+61, is presented. It is found that the spectrum of this object is similar to those of numerous QSOs and Seyfert galaxies, that the forbidden lines yield a redshift of approximately 0.0438, and that the Balmer emission lines are extraordinarily broad, implying a full-width zero intensity of 24,000 km/s in the rest frame. A distinguishing feature of the spectrum is the presence of very prominent unredshifted interstellar absorption lines and bands, indicating that interstellar extinction in the Galaxy is very important for 0241+622. The extinction is estimated quantitatively on the basis of the equivalent widths of interstellar features, the continuum spectral index, the Balmer decrement, the luminosity in H-beta, and 21-cm emission measurements. An absolute visual magnitude of -25.3 is derived which lies well within the luminosity range normally attributed to QSOs. Publication: The Astrophysical Journal Pub Date: September 1978 DOI: 10.1086/182755 Bibcode: 1978ApJ...224L..43M Keywords: Emission Spectra; Quasars; Red Shift; Stellar Spectrophotometry; X Ray Sources; Balmer Series; Decimeter Waves; H Beta Line; H Lines; Microwave Emission; Spectral Line Width; Astrophysics; Emission-Line Objects:Spectrophotometry; Luminosities:Quasars; Quasars:Spectra full text sources ADS | data products SIMBAD (5) NED (4)