SDSS galaxies with double-peaked emission lines: double starbursts or active galactic nuclei?
نویسندگان
چکیده
منابع مشابه
Black hole mass and accretion rate of active galactic nuclei with double-peaked broad emission lines
Using an empirical relation between the broad line region size and optical continuum luminosity, we estimated the black hole mass and accretion rate for 135 AGNs with double-peaked broad emission lines in two samples, one from the SDSS and the other from a survey of radio-loud broad emission line AGNs. With black hole masses in a range from 3×10M⊙ to 5×10 M⊙, these AGNs have the dimensionless a...
متن کاملLong-term Profile Variability of Double Peaked Emission Lines in Active Galactic Nuclei
We present up to two decades of spectroscopic monitoring of the double-peaked broad Hα emission lines of seven broad-line radio galaxies. These extremely broad, double-peaked lines are successfully modeled by emission from gas in the outer accretion disk, and their profiles vary on timescales of months to years. This variability is a valuable probe for understanding the structure and dynamics o...
متن کاملActive Galactic Nuclei with Double-peaked Narrow Lines: Are They Dual Agns?
Double-peaked [O III] profiles in active galactic nuclei (AGNs) may provide evidence for the existence of dual AGNs, but a good diagnostic for selecting them is currently lacking. Starting from ∼ 7000 active galaxies in SDSS DR7, we assemble a sample of 87 type 2 AGNs with double-peaked [O III] profiles. The nuclear obscuration in the type 2 AGNs allows us to determine redshifts of host galaxie...
متن کاملActive Galactic Nuclei with Double-peaked Balmer Lines: I. Black Hole Masses and the Eddington Ratios
Using the stellar population synthesis, we model the stellar contribution for a sample of 110 doublepeaked broad-lines AGNs from the Sloan Digital Sky Survey (SDSS). The stellar velocity dispersions (σ∗) are obtained for 52 double-peaked AGNs with obvious stellar absorption features, ranging from 106 to 284 km s . We also use multi-component profiles to fit [O III]λλ4959, 5007 and Hβ emission l...
متن کاملThe Ultraviolet Spectra of Active Galaxies With Double-Peaked Emission Lines
We present the results of UV spectroscopy of AGNs with double-peaked Balmer emission lines. In 2/3 of the objects, the far-UV resonance lines are strong, with single-peaked profiles resembling those of Seyfert galaxies. The Mg ii line is the only UV line with a doublepeaked profile. In the remaining objects, the far-UV resonance lines are relatively weak but still single-peaked. The latter grou...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2011
ISSN: 0035-8711
DOI: 10.1111/j.1365-2966.2011.19714.x