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  The central parsec of NGC 3783: a rotating broad emission line region, asymmetric hot dust structure, and compact coronal line region

Amorim, A., Bauböck, M., Brandner, W., Bolzer, M., Clénet, Y., Davies, R., et al. (2021). The central parsec of NGC 3783: a rotating broad emission line region, asymmetric hot dust structure, and compact coronal line region. Astronomy and Astrophysics, 648: A117. doi:10.1051/0004-6361/202040061.

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Amorim, A., Author
Bauböck, M.1, Author           
Brandner, W., Author
Bolzer, M., Author
Clénet, Y., Author
Davies, R.1, Author           
de Zeeuw, P. T.1, Author           
Dexter, J.1, Author           
Drescher, A.1, Author           
Eckart, A.1, Author           
Eisenhauer, F.1, Author           
Förster Schreiber, N. M.1, Author           
Gao, F.1, Author           
Garcia, P. J. V., Author
Genzel, R.1, Author           
Gillessen, S.1, Author           
Gratadour, D., Author
Hönig, S., Author
Kaltenbrunner, D.2, Author           
Kishimoto, M., Author
Lacour, S., AuthorLutz, D.1, Author           Millour, F., AuthorNetzer, H., AuthorOtt, T.1, Author           Paumard, T., AuthorPerraut, K., AuthorPerrin, G., AuthorPeterson, B. M., AuthorPetrucci, P. O., AuthorPfuhl, O., AuthorPrieto, M. A., AuthorRouan, D., AuthorSanchez-Bermudez, J., AuthorShangguan, J.1, Author           Shimizu, T.1, Author           Schartmann, M.3, Author           Stadler, J.1, Author           Sternberg, A., AuthorStraub, O.1, Author           Straubmeier, C., AuthorSturm, E.1, Author           Tacconi, L. J.1, Author           Tristram, K. R. W., AuthorVermot, P., AuthorFellenberg, S. von1, Author           Waisberg, I., AuthorWidmann, F.1, Author           Woillez, J., Author more..
Affiliations:
1Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society, ou_159889              
2MPI for Extraterrestrial Physics, Max Planck Society, ou_159888              
3Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society, ou_159895              

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 Abstract: Using VLTI/GRAVITY and SINFONI data, we investigate the subparsec gas and dust structure around the nearby type 1 active galactic nucleus (AGN) hosted by NGC 3783. The K-band coverage of GRAVITY uniquely allows simultaneous analysis of the size and kinematics of the broad line region (BLR), the size and structure of the near-infrared(near-IR)-continuum-emitting hot dust, and the size of the coronal line region (CLR). We find the BLR, probed through broad Brγ emission, to be well described by a rotating, thick disc with a radial distribution of clouds peaking in the inner region. In our BLR model, the physical mean radius of 16 light-days is nearly twice the ten-day time-lag that would be measured, which closely matches the ten-day time-lag that has been measured by reverberation mapping. We measure a hot dust full-width at half-maximum (FWHM) size of 0.74 mas (0.14 pc) and further reconstruct an image of the hot dust, which reveals a faint (5% of the total flux) offset cloud that we interpret as an accreting or outflowing cloud heated by the central AGN. Finally, we directly measure the FWHM size of the nuclear CLR as traced by the [Ca VIII] and narrow Brγ line. We find a FWHM size of 2.2 mas (0.4 pc), fully in line with the expectation of the CLR located between the BLR and narrow line region. Combining all of these measurements together with larger scale near-IR integral field unit and mid-IR interferometry data, we are able to comprehensively map the structure and dynamics of gas and dust from 0.01 to 100 pc.

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Language(s): eng - English
 Dates: 2021-04-28
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1051/0004-6361/202040061
 Degree: -

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Title: Astronomy and Astrophysics
  Other : Astron. Astrophys.
Source Genre: Journal
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Publ. Info: France : EDP Sciences S A
Pages: - Volume / Issue: 648 Sequence Number: A117 Start / End Page: - Identifier: ISSN: 1432-0746
CoNE: https://pure.mpg.de/cone/journals/resource/954922828219_1