Possible Evidence for a Truncated Thin Disk in Seyfert 1 Galaxy NGC4593

Abstract

We compile the multi-band spectral energy distribution (SED) of Seyfert 1 galaxy NGC4593, and investigate its optical-to-ultraviolet (OUV) continuum and iron Kαline profile. No strong ``big blue bump'' is found in OUV band. The iron Kαline profile is not as broad as expected from a disk which extends down to the last stable orbit. Both of them can be modeled by a truncated thin disk, and support the existence of a truncated thin disk in the system. It is of much interest that NGC4593 may be a typical object with an accretion rate \dot{m}=\dot{M}/M_{Edd} \sim 0.01-0.1 and harbors a two component accretion flow: an outer thin disk and an inner hot flow--possibly ADAF, analogous to the low and intermediate state of low mass X-ray binaries (LMXB).

5 pages, including 3 figures, accepted for publication in ApJL

References in corpus (9)

• Keplerian Motion of Broad-Line Region Gas as Evidence for Supermassive Black Holes in Active Galactic Nuclei
• Jet directions in Seyfert galaxies
• Low radiative efficiency accretion in the nuclei of elliptical galaxies
• Possible Evidence for Truncated Thin Disks in the Low-Luminosity Active Galactic Nuclei M81 and NGC 4579
• Simultaneous EUVE/ASCA/RXTE Observations of NGC 5548
• The relativistic iron line profile in the Seyfert 1 Galaxy IC4329a
• Two Different Accretion Classes in Seyfert 1 Galaxies and QSOs
• High Resolution Infrared Imaging of the Compact Nuclear Source in NGC4258
• The Ultraviolet Peak of the Energy Distribution in 3C~273: Evidence for an Accretion Disk and Hot Corona Around a Massive Black Hole

Cited by in corpus (9)

• The large scale magnetic fields of advection dominated accretion flows
• The Dependence of Spectral State Transition and Disk Truncation on Viscosity Parameter $α
• Two extreme double-peaked line emitters in the Sloan Digital Sky Survey
• Iron Kalpha emission from the low-luminosity Active Galaxies M81 and NGC 4579
• A Suzaku Observation of NGC 4593: Illuminating the Truncated Disk
• The effects of relativistic bulk motion of X-ray flares in the corona on the iron Kalpha line in Seyfert 1 galaxies
• Energy Dependent time lags in the Seyfert 1 galaxy NGC 4593
• Warm absorber and truncated accretion disc in IRAS 05078+1626
• Constraints on radiatively inefficient accretion history from Eddington ratio distribution of active galactic nuclei