Two extreme double-peaked line emitters in the Sloan Digital Sky Survey

Abstract

Double-peaked Balmer lines have been observed in about 150 AGNs and were interpreted preferably as emission from relativistic accretion disks. In this paper, we report the discovery of extreme double-peaked lines in SDSS J0942+0900 and SDSS J1417+6141. The FWHM of the Halpha line ~40,600 km/s in the first object is almost twice as large as the broadest one previously known. By comparing the line profile with accretion disk models, we find that most of the line flux is emitted from a narrow annulus around 100Rg in SDSS J0942+0900, and from a disk of radii between 100 and 400Rg in SDSS J1417+6141. This is the first time that an accretion disk at radii below 100Rg can be directly probed through optical emission lines. A certain asymmetry in the disk is required for both objects. Another much weaker broad Halpha component (EW~20A, and FWHM 4000km/s) is also detected in both objects. Both objects show weak radio emission and strong high-ionization narrow lines.

arXiv commentApJ Letters accepted

References in corpus (14)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• The Sloan Digital Sky Survey: Technical Summary
• The Demography of Massive Dark Objects in Galaxy Centres
• Reverberation Measurements for 17 Quasars and the Size-Mass-Luminosity Relations in Active Galactic Nuclei
• The Third Data Release of the Sloan Digital Sky Survey
• Broad iron lines in Active Galactic Nuclei
• Optical and Radio Properties of Extragalactic Sources Observed by the FIRST and SDSS Surveys
• Completion of a Survey and Detailed Study of Double-Peaked Emission Lines in Radio-Loud AGNs
• Double-Peaked Low-Ionization Emission Lines in Active Galactic Nuclei
• Black Hole Mass, Velocity Dispersion and the Radio Source in AGN
• Possible Evidence for Truncated Thin Disks in the Low-Luminosity Active Galactic Nuclei M81 and NGC 4579
• Evidence for a Black Hole and Accretion Disk in the LINER NGC 4203
• Partially obscured quasars in the Sloan Digital Sky Survey Early Data Release
• Possible Evidence for a Truncated Thin Disk in Seyfert 1 Galaxy NGC4593

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