2020A&A...643A.154G


Query : 2020A&A...643A.154G

2020A&A...643A.154G - Astronomy and Astrophysics, volume 643A, 154-154 (2020/11-1)

The spatially resolved broad line region of IRAS 09149-6206.

GRAVITY COLLABORATION, AMORIM A., BAUBOCK M., BRANDNER W., CLENET Y., DAVIES R., DE ZEEUW P.T., DEXTER J., ECKART A., EISENHAUER F., FORSTER SCHREIBER N.M., GAO F., GARCIA P.J.V., GENZEL R., GILLESSEN S., GRATADOUR D., HONIG S., KISHIMOTO M., LACOUR S., LUTZ D., MILLOUR F., NETZER H., OTT T., PAUMARD T., PERRAUT K., PERRIN G., PETERSON B.M., PETRUCCI P.O., PFUHL O., PRIETO M.A., ROUAN D., SHANGGUAN J., SHIMIZU T., SCHARTMANN M., STADLER J., STERNBERG A., STRAUB O., STRAUBMEIER C., STURM E., TACCONI L.J., TRISTRAM K.R.W., VERMOT P., VON FELLENBERG S., WAISBERG I., WIDMANN F. and WOILLEZ J.

Abstract (from CDS):

We present new near-infrared VLTI/GRAVITY interferometric spectra that spatially resolve the broad Brγ emission line in the nucleus of the active galaxy IRAS 09149-6206. We use these data to measure the size of the broad line region (BLR) and estimate the mass of the central black hole. Using an improved phase calibration method that reduces the differential phase uncertainty to 0.05° per baseline across the spectrum, we detect a differential phase signal that reaches a maximum of ∼0.5° between the line and continuum. This represents an offset of ∼120µas (0.14pc) between the BLR and the centroid of the hot dust distribution traced by the 2.3µm continuum. The offset is well within the dust sublimation region, which matches the measured ∼0.6mas (0.7pc) diameter of the continuum. A clear velocity gradient, almost perpendicular to the offset, is traced by the reconstructed photocentres of the spectral channels of the Brγ line. We infer the radius of the BLR to be ∼65µas (0.075pc), which is consistent with the radius-luminosity relation of nearby active galactic nuclei derived based on the time lag of the Hβ line from reverberation mapping campaigns. Our dynamical modelling indicates the black hole mass is ∼1x108M, which is a little below, but consistent with, the standard MBH* relation.

Abstract Copyright: © GRAVITY Collaboration 2020

Journal keyword(s): galaxies: active - galaxies: nuclei - galaxies: Seyfert - quasars: supermassive black holes - techniques: interferometric

Simbad objects: 8

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Number of rows : 8
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 M 77 GiP 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4324 2
2 [VV96] J091609.5-621929 Sy1 09 16 09.3662148312 -62 19 29.562130128   12.51 12.26 11.5   ~ 122 0
3 Mrk 142 Sy1 10 25 31.2786898344 +51 40 34.867889004   16.33 16.12     ~ 256 0
4 Mrk 40 Sy1 11 25 36.1539761184 +54 22 57.113791824   17.06 16.47     ~ 241 0
5 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 5559 1
6 IRAS 17002+5153 Sy1 17 01 24.8265469104 +51 49 20.447878836   15.49 15.12     ~ 367 0
7 QSO B1725-142 QSO 17 28 19.7893499760 -14 15 55.854918288   14.69 14.03 13.7   ~ 269 0
8 Z 229-15 Sy1 19 05 25.9385931648 +42 27 39.759455520   15.4       ~ 94 0

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2022.05.26-21:47:02

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