1E 0104.2 + 3153 - A broad absorption-line QSO viewed through a giant elliptical galaxy

Details 1E 0104.2 + 3153 - A broad absorption-line QSO viewed through a giant elliptical galaxy 1E 0104.2 + 3153 - A broad absorption-line QSO viewed through a giant elliptical galaxy

Feb 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...277...43s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 277, Feb. 1, 1984, p. 43-50. Resarch supported by the Piano Spaziale Nazion

Astronomy and Astrophysics

Astrophysics

28

Absorption Spectra, Astronomical Photometry, Elliptical Galaxies, Interstellar Gas, Quasars, X Ray Sources, Charge Coupled Devices, Galaxies, Gravitational Lenses, H Lines, K Lines, Light (Visible Radiation), Monte Carlo Method, Stellar Spectrophotometry

Scientific paper

The optical identification of the X-ray source 1E 0104.2 + 3153 is complicated by the close projection of a broad absorption-line (BAL) QSO (z = 2.027) 10 arcsec from a giant elliptical galaxy (z = 0.111) at the center of a compact group of galaxies. At only 1.2 de Vaucouleur radii (16 kpc for H0 = 100 km/s Mpc) this QSO-galaxy projection is the closest yet discovered. Based upon current observations, the source of the X-ray emission cannot be conclusively determined. Present in the BAL QSO spectrum are extremely strong Ca II H and K absorption lines due to the intervening galaxy, the first optical detection of the cold interstellar medium in an elliptical galaxy. The strength of these lines (EW = 2 and 1 A) requires observation through several interstellar clouds in the line of sight to the QSO. By its proximity to the central regions of the elliptical galaxy and the relative distances of the galaxy and QSO, this QSO is a particularly good candidate for observing dramatic transient gravitational lensing phenomena due to halo stars in the foreground galaxy.

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