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  The multiphase gas structure and kinematics in the circumnuclear region of NGC 5728

Shimizu, T. T., Davies, R. I., Lutz, D., Burtscher, L., Lin, M., Baron, D., et al. (2019). The multiphase gas structure and kinematics in the circumnuclear region of NGC 5728. Monthly Notices of the Royal Astronomical Society, 490(4), 5860-5887. doi:10.1093/mnras/stz2802.

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Shimizu, T. Taro1, Author           
Davies, R. I.1, Author           
Lutz, D.1, Author           
Burtscher, L., Author
Lin, M., Author
Baron, D., Author
Davies, R. L.1, Author           
Genzel, R.1, Author           
Hicks, E.K.S., Author
Koss, M., Author
Maciejewski, W., Author
ller-Sanchez, F. Mu, Author
de Xivry, G. Orban, Author
Price, S. H.1, Author           
Ricci, C., Author
Riffel, R., Author
Riffel, R.A., Author
Rosario, D., Author
Schartmann, M.2, Author           
Schnorr-Muller, A., Author
Sternberg, A., AuthorSturm, E.1, Author           Storchi-Bergmann, T., AuthorTacconi, L.1, Author           Veilleux, S., Author more..
Affiliations:
1Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society, ou_159889              
2Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society, ou_159895              

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 Abstract: We report on our combined analysis of HST, VLT/MUSE, VLT/SINFONI, and ALMA observations of the local Seyfert 2 galaxy, NGC 5728 to investigate in detail the feeding and feedback of the active galactic nucleus (AGN). The data sets simultaneously probe the morphology, excitation, and kinematics of the stars, ionized gas, and molecular gas over a large range of spatial scales (10 pc to 10 kpc). NGC 5728 contains a large stellar bar that is driving gas along prominent dust lanes to the inner 1 kpc where the gas settles into a circumnuclear ring. The ring is strongly star forming and contains a substantial population of young stars as indicated by the lowered stellar velocity dispersion and gas excitation consistent with H ii regions. We model the kinematics of the ring using the velocity field of the CO (2–1) emission and stars and find it is consistent with a rotating disc. The outer regions of the disc, where the dust lanes meet the ring, show signatures of inflow at a rate of 1 M<sub>⊙</sub> yr<sup>−1</sup>. Inside the ring, we observe three molecular gas components corresponding to the circular rotation of the outer ring, a warped disc, and the nuclear stellar bar. The AGN is driving an ionized gas outflow that reaches a radius of 250 pc with a mass outflow rate of 0.08 M<sub>⊙ yr</sup>−1 consistent with its luminosity and scaling relations from previous studies. While we observe distinct holes in CO emission which could be signs of molecular gas removal, we find that largely the AGN is not disrupting the structure of the circumnuclear region.

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 Dates: 2019-10-12
 Publication Status: Published online
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 Rev. Type: Peer
 Identifiers: DOI: 10.1093/mnras/stz2802
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Title: Monthly Notices of the Royal Astronomical Society
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Source Genre: Journal
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Publ. Info: OXFORD : OXFORD UNIV PRESS
Pages: - Volume / Issue: 490 (4) Sequence Number: - Start / End Page: 5860 - 5887 Identifier: ISSN: 0035-8711
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000021470