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AGN SIG Seminar

Active Galactic Nuclei Science Interest Group

DATE

Nov 08, 2022

TIME

12:00 pm EST

COMMUNITY

AGN SIG

TYPE

Seminar

AGN or starburst? An off-nuclear deeply embedded compact source in IIZw096

Hanae Inami

Local luminous infrared galaxies (LIRGs) provide an ideal laboratory for detailed investigations of extreme phenomena such as active galactic nuclei (AGN) and starbursts induced by mergers. IIZw096 is one such system with infrared emission that peaks outside of the two merging nuclei. This region is completely embedded by dust and no emission is detected in the UV and optical with HST. Previous observations with Spitzer have hinted that most of the mid- and far-infrared emission of the whole system is from a single source in the region. However, its exact location could not be nailed down due to the limited spatial resolution, and its energy source has also been unknown. In this talk, I will present some results from new JWST imaging observations of the dust embedded region in IIZw096. Thanks to the superb resolution and sensitivity of JWST, we have finally pinpointed the exact source that is responsible for the bulk of the infrared emission and constrained its infrared luminosity density. At the current time, it is not clear whether this source is powered by an AGN or a starburst. I’ll discuss the intriguing nature of this red compact source.

Find the schedule and list of speakers on our website.

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An illustration of Sun-like star HD 181327 and its surrounding debris disk. The star is at top right. It is surrounded by a far larger debris disk that forms an incomplete ellpitical path and is cut off at right. There’s a huge cavity between the star and the disk. The debris disk is shown in shades of light gray. Toward the top and left, there are finer, more discrete points in a range of sizes. The disk appears hazier and smokier at the bottom. The star is bright white at center, with a hazy blue region around it. The background of space is black. The label Artist's Concept appears at lower left.