Subaru Spectropolarimetry of Mrk 573: The Hidden High-Ionization Nuclear Emission-Line Region inside the Dusty Torus

Abstract

We report on the result of our high quality spectropolarimetric observation for the narrow-line region in a nearby Seyfert 2 galaxy, Mrk 573, by the Subaru Telescope. The polarized flux spectrum of Mrk 573 shows not only prominent scattered broad H$\alpha$ emission but also various narrow forbidden emission lines. We find that the measured polarization degree of the observed forbidden emission lines is positively correlated with the ionization potential of the corresponding ions and the critical density of the corresponding transitions. We discuss some possible origins of these correlations, and then we point out that the correlations are caused due to the obscuration of the stratified narrow-line region in Mrk 573 by the optically and geometrically thick dusty torus, just similar to the previous study on NGC 4258.

arXiv comment10 pages including 8 figures, to appear in The Astronomical Journal

References in corpus (28)

• Stellar population synthesis at the resolution of 2003
• The Nuclear and Circum-nuclear Stellar Population in Seyfert 2 Galaxies: Implications for the Starburst-AGN Connection
• Hidden Broad Line Seyfert 2 Galaxies in the CfA and 12micron Samples
• HST and VLA Observations of Seyfert 2 Galaxies: The Relationship between Radio Ejecta and the Narrow Line Region
• A Hubble Space Telescope Survey of Extended [OIII]5007A Emission in a Far-Infrared Selected Sample of Seyfert Galaxies: Observations
• Empirical diagnostics of the starburst-AGN connection
• Current Performance and On-Going Improvements of the 8.2 m Subaru Telescope
• Inner Size of a Dust Torus in the Seyfert 1 Galaxy NGC 4151
• Locally Optimally-emitting Clouds and the Narrow Emission Lines in Seyfert Galaxies
• Spectral Synthesis of the Nuclear Region of Seyfert 2 and Radio Galaxies
• Polarized Broad-Line Emission from Low-Luminosity Active Galactic Nuclei
• The High-Ionization Nuclear Emission-Line Region of Seyfert Galaxies
• Where is the coronal line region in active galactic nuclei?
• Polarized Broad H-alpha Emission from the LINER Nucleus of NGC 1052
• Where is the [O III]4363 emitting region in active galactic nuclei?
• Keck Observations of the Hidden Quasar IRAS P09104+4109
• IMAGING SPECTROPHOTOMETRY OF MARKARIAN 573
• Stellar population gradients in Seyfert 2 galaxies. Northern sample
• Seyfert-Type Dependences of Narrow Emission-Line Ratios and Physical Properties of High-Ionization Nuclear Emission-Line Regions in Seyfert Galaxies
• UV Spectropolarimetry of Narrow-line Radio Galaxies
• Polarized Narrow-Line Emission from the Nucleus of NGC 4258
• The difference between the narrow line region of Seyfert 1 and Seyfert 2 galaxies
• A New Dual-Component Photoionization Model for the Narrow Emission-Line Regions in Active Galactic Nuclei
• Detection of Polarized Broad Emission in the Seyfert 2 Galaxy Mrk 573
• Far-Infrared Census of Starburst-Seyfert Connection
• Extended Gas in Seyfert Galaxies: Near-Infrared Observations of 15 Active Nuclei
• A Hidden Broad-Line Region in the Weak Seyfert 2 Galaxy NGC 788
• Dusty Tori of Seyfert Nuclei Probed by the Water Vapor Maser Emission: How Large are the Dusty Tori ?

Cited by in corpus (8)

• A 0.8-2.4 microns spectral atlas of Active Galactic Nuclei
• Probing the near infrared stellar population of Seyfert galaxies
• Quantifying Feedback from Narrow Line Region Outflows in Nearby Active Galaxies. I. Spatially Resolved Mass Outflow Rates for the Seyfert 2 Galaxy Markarian 573
• Near-Infrared Spectroscopy of Seyfert Galaxies. Nuclear Activity and Stellar Population
• Demystifying the coronal line region of active galactic nuclei: spatially resolved spectroscopy with HST
• Physical Conditions in the Inner Narrow Line Region of the Seyfert 2 Galaxy Markarian 573
• Spectropolarimetric Evidence for Radiatively Inefficient Accretion in an Optically Dull Active Galaxy
• The study of Seyfert 2 galaxies with and without infrared broad lines