Positive and Negative Feedback of AGN Outflows in NGC 5728

Jaejin Shin, Jong Hak Woo, Aeree Chung, Junhyun Baek, Kyuhyoun Cho, Daeun Kang, Hyun Jin Bae

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44 Citations (Scopus)


We present a spatially resolved analysis of ionized and molecular gas in a nearby Seyfert 2 galaxy, NGC 5728, using the Very Large Telescope/MUSE and Atacama Large Millimeter/submillimeter Array data. We find ionized gas outflows out to ∼2 kpc scales, which encounter the star formation ring at 1 kpc radius. The star formation rate of the encountering region is significantly high (∼1.8 M o yr kpc-2) compared to other regions in the ring. In contrast, the CO (2-1) emission is significantly weaker by a factor of ∼3.5, indicating very high star formation efficiency. These results support the positive feedback scenario that the active galactic nucleus (AGN)-driven outflows compress the ISM in the ring, enhancing the star formation activity. In addition, we detect outflow regions outside of spiral arms, in which gas is likely to be removed from the spiral arms and no clear sign of star formation is detected. The overall impact of AGN outflows on the global star formation in NGC 5728 is limited, suggesting the feedback of the low-luminosity AGNs is insignificant.

Original languageEnglish
Article number147
JournalAstrophysical Journal
Issue number2
Publication statusPublished - 2019 Aug 20

Bibliographical note

Publisher Copyright:
© 2019. The American Astronomical Society. All rights reserved..

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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