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Resolving the hot dust disk of ESO323-G77

Resolving the hot dust disk of ESO323-G77
Resolving the hot dust disk of ESO323-G77
Infrared interferometry has led to a paradigm shift in our understanding of the dusty structure in the central parsecs of active galactic nuclei (AGNs). The dust is now thought to comprise a hot (~1000 K) equatorial disk, some of which is blown into a cooler (~300 K) polar dusty wind by radiation pressure. In this paper, we utilize the new near-IR interferometer GRAVITY on the Very Large Telescope Interferometer (VLTI) to study a Type 1.2 AGNs hosted in the nearby Seyfert galaxy ESO 323-G77. By modeling the squared visibility and closure phase, we find that the hot dust is equatorially extended, consistent with the idea of a disk, and shows signs of asymmetry in the same direction. Furthermore, the data is fully consistent with the hot dust size determined by K-band reverberation mapping as well as the predicted size from a CAT3D-WIND model created in previous work using the spectral energy distribution of ESO 323-G77 and observations in the mid-IR from VLTI/MID-infrared Interferometric instrument).
0004-637X
Leftley, James H.
ac8e41f0-6869-4f74-933b-4c438dd55f26
Tristram, Konrad R.W.
8fb09666-1abd-411c-841e-398bdfac90e3
Hönig, Sebastian F.
a753bd28-49b8-4324-8ca6-9486f0d4957d
Asmus, Daniel
dfee6276-a441-41ff-a0e9-06ae5670cd19
Kishimoto, Makoto
db533038-0886-40af-9f61-2b009b86be34
Gandhi, Poshak
5bc3b5af-42b0-4dd8-8f1f-f74048d4d4a9
Leftley, James H.
ac8e41f0-6869-4f74-933b-4c438dd55f26
Tristram, Konrad R.W.
8fb09666-1abd-411c-841e-398bdfac90e3
Hönig, Sebastian F.
a753bd28-49b8-4324-8ca6-9486f0d4957d
Asmus, Daniel
dfee6276-a441-41ff-a0e9-06ae5670cd19
Kishimoto, Makoto
db533038-0886-40af-9f61-2b009b86be34
Gandhi, Poshak
5bc3b5af-42b0-4dd8-8f1f-f74048d4d4a9

Leftley, James H., Tristram, Konrad R.W., Hönig, Sebastian F., Asmus, Daniel, Kishimoto, Makoto and Gandhi, Poshak (2021) Resolving the hot dust disk of ESO323-G77. Astrophysical Journal, 912 (2). (doi:10.3847/1538-4357/abee80/meta).

Record type: Article

Abstract

Infrared interferometry has led to a paradigm shift in our understanding of the dusty structure in the central parsecs of active galactic nuclei (AGNs). The dust is now thought to comprise a hot (~1000 K) equatorial disk, some of which is blown into a cooler (~300 K) polar dusty wind by radiation pressure. In this paper, we utilize the new near-IR interferometer GRAVITY on the Very Large Telescope Interferometer (VLTI) to study a Type 1.2 AGNs hosted in the nearby Seyfert galaxy ESO 323-G77. By modeling the squared visibility and closure phase, we find that the hot dust is equatorially extended, consistent with the idea of a disk, and shows signs of asymmetry in the same direction. Furthermore, the data is fully consistent with the hot dust size determined by K-band reverberation mapping as well as the predicted size from a CAT3D-WIND model created in previous work using the spectral energy distribution of ESO 323-G77 and observations in the mid-IR from VLTI/MID-infrared Interferometric instrument).

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Resolving the Hot Dust Disk of ESO323-G77 - Accepted Manuscript
Restricted to Repository staff only until 10 May 2022.
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More information

Accepted/In Press date: 12 March 2021
e-pub ahead of print date: 10 May 2021
Additional Information: arxiv is am

Identifiers

Local EPrints ID: 449650
URI: http://eprints.soton.ac.uk/id/eprint/449650
ISSN: 0004-637X
PURE UUID: 4fe813d6-5dae-4021-8986-9b18f32ac31e
ORCID for Poshak Gandhi: ORCID iD orcid.org/0000-0003-3105-2615

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Date deposited: 10 Jun 2021 16:31
Last modified: 11 Jun 2021 01:45

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Contributors

Author: James H. Leftley
Author: Konrad R.W. Tristram
Author: Sebastian F. Hönig
Author: Daniel Asmus
Author: Makoto Kishimoto
Author: Poshak Gandhi ORCID iD

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