The Discovery of a Giant Hα Filament in NGC 7213 | Zendy

Salman Hameed | Zendy; D. L. Blank | Zendy; Lisa M. Young | Zendy; Nick Devereux | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

The Discovery of a Giant Hα Filament in NGC 7213

Author(s) -

Salman Hameed,

D. L. Blank,

Lisa M. Young,

Nick Devereux

Publication year - 2001

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/318865

Subject(s) - physics , protein filament , astrophysics , galaxy , telescope , hubble sequence , observatory , astronomy , nucleus , jet (fluid) , ionization , luminous infrared galaxy , ion , chemistry , biology , microbiology and biotechnology , thermodynamics , biochemistry , quantum mechanics

The nearby Seyfert galaxy NGC 7213 has been imaged in H-alpha and HI with theCTIO 1.5 m telescope and with the Australia Telescope Compact Array (ATCA),respectively. Optically NGC 7213 looks undisturbed and relatively featurelessbut the continuum-subtracted H-alpha image shows a 19 kpc long filament locatedapproximately 18.6 kpc from the nucleus. The H-alpha filament could be neutralgas photo-ionized by the active nucleus, as has been suggested for the Seyfertgalaxy NGC 5252, or shock-ionized by a jet interacting with the surrounding HI,as has been suggested for the radio galaxy PKS 2240-41. The HI map reveals NGC7213 to be a highly disturbed system suggesting a past merging event.Comment: 14 pages including 4 figures and 1 table. Figures 1-4 are in jpeg format; Better quality images can be retrieved in postscript format at ftp://charon.nmsu.edu/pub/shameed/ ; Accepted for publication in ApJ Letter

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research