Title of article :
Supersolar Metallicity in the NLS1 Galaxy Markarian 1044
Author/Authors :
Smita-Mathur، نويسنده , , Dale L. Fields، نويسنده , , Richard W. Pogge، نويسنده , , Fabrizio Nicastro، نويسنده , , Stefanie Komossa، نويسنده , , Yair Krongold، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی 2 سال 2005
Abstract :
We present measurements of the metallicity of the circumnuclear gas in the narrow-line Seyfert 1 (NLS1) galaxy Markarian 1044 using O VI column density measurements from the Far Ultraviolet Spectroscopic Explorer (FUSE) together with C IV, N V, and H I measurements from the Hubble Space Telescope (HST). From the absorption lines we find that the circumnuclear gas in Mrk 1044 has a metallicity of at least 5 times solar, consistent with the expectation from previous emission-line studies that NLS1s have a high metallicity, similar to that found in high-redshift quasars. More surprisingly, we find that the absorbing material requires a near-solar mixture of elements in which the N/C ratio is consistent with the solar ratio and does not scale with the metallicity. This suggests that the chemical enrichment scenario for this active galactic nucleus (and thus possibly others) may be different from the traditional model of galactic metal enrichment, at least in the high-metallicity regime.
Keywords :
Abundances , galaxies , Seyfert , emission lines , quasars , absorption lines , individual (Markarian 1044) , Ultraviolet
Journal title :
Astrophysical Journal
Journal title :
Astrophysical Journal