Dexter, J., Shangguan, J., Honig, S., Kishimoto, M., Lutz, D., Netzer, H., Davies, R., Sturm, E., Pfuhl, O., Amorim, A., Bauboeck, M., Brandner, W., Clenet, Y., de Zeeuw, P. T., Eckart, A., Eisenhauer, F., Schreiber, N. M. Foerster, Gao, F., Garcia, P. J., V, Genzel, R., Gillessen, S., Gratadour, D., Jimenez-Rosales, A., Lacour, S., Millour, F., Ott, T., Paumard, T., Perraut, K., Perrin, G., Peterson, B. M., Petrucci, P. O., Prieto, M. A., Rouan, D., Schartmann, M., Shimizu, T., Sternberg, A., Straub, O., Straubmeier, C., Tacconi, L. J., Tristram, K., Vermot, P., Waisberg, I, Widmann, F. and Woillez, J. (2020). The resolved size and structure of hot dust in the immediate vicinity of AGN. Astron. Astrophys., 635. LES ULIS CEDEX A: EDP SCIENCES S A. ISSN 1432-0746

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Abstract

We use VLTI/GRAVITY near-infrared interferometry measurements of eight bright type 1 AGN to study the size and structure of hot dust that is heated by the central engine. We partially resolve each source, and report Gaussian full width at half-maximum sizes in the range 0.3-0.8 mas. In all but one object, we find no evidence for significant elongation or asymmetry (closure phases less than or similar to 1 degrees). The narrow range of measured angular sizes is expected given the similar optical flux of our targets, and implies an increasing effective physical radius with bolometric luminosity, as found from previous reverberation and interferometry measurements. The measured sizes for Seyfert galaxies are systematically larger than for the two quasars in our sample when measured relative to the previously reported R similar to L-1/2 relationship, which is explained by emission at the sublimation radius. This could be evidence of an evolving near-infrared emission region structure as a function of central luminosity.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Dexter, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Shangguan, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Honig, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kishimoto, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lutz, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Netzer, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Davies, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sturm, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pfuhl, O.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Amorim, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bauboeck, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Brandner, W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Clenet, Y.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
de Zeeuw, P. T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Eckart, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Eisenhauer, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schreiber, N. M. FoersterUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gao, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Garcia, P. J., VUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Genzel, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gillessen, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gratadour, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jimenez-Rosales, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lacour, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Millour, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ott, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Paumard, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Perraut, K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Perrin, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Peterson, B. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Petrucci, P. O.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Prieto, M. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rouan, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schartmann, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Shimizu, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sternberg, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Straub, O.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Straubmeier, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tacconi, L. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tristram, K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vermot, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Waisberg, IUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Widmann, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Woillez, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-341039
DOI: 10.1051/0004-6361/201936767
Journal or Publication Title: Astron. Astrophys.
Volume: 635
Date: 2020
Publisher: EDP SCIENCES S A
Place of Publication: LES ULIS CEDEX A
ISSN: 1432-0746
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
ACTIVE GALACTIC NUCLEI; BLACK-HOLE MASSES; X-RAY; REVERBERATION MEASUREMENTS; INFRARED-EMISSION; QUASAR; VARIABILITY; GALAXIES; REGION; SPECTROPOLARIMETRYMultiple languages
Astronomy & AstrophysicsMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/34103

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