The central parsec of NGC 3783: a rotating broad emission line region, asymmetric hot dust structure, and compact coronal line region
The central parsec of NGC 3783: a rotating broad emission line region, asymmetric hot dust structure, and compact coronal line region
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DOI：
10.1051/0004-6361/202040061
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发表时间：
2021-01
影响因子：
6.5
通讯作者：
G. Collaboration;A. Amorim;M. Baubock;W. Brandner;M. Bolzer;Y. Cl'enet;R. Davies;P. D. Zeeuw;J. Dexter;A. Drescher;A. Eckart;F. Eisenhauer;N. F. Schreiber;F. Gao;P. Garcia;R. Genzel;S. Gillessen;D. Gratadour;S. Honig;D. Kaltenbrunner;M. Kishimoto;S. Lacour;D. Lutz;F. Millour;H. Netzer;T. Ott;T. Paumard;K. Perraut;G. Perrin;B. Peterson;P. Petrucci;O. Pfuhl;M. Prieto;D. Rouan;J. Sanchez-Bermudez;J. Shangguan;T. Shimizu;M. Schartmann;J. Stadler;A. Sternberg;O. Straub;C. Straubmeier;E. Sturm;L. Tacconi;K. Tristram;P. Vermot;S. Fellenberg;I. Waisberg;F. Widmann;J. Woillez
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文献类型：
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作者：
G. Collaboration;A. Amorim;M. Baubock;W. Brandner;M. Bolzer;Y. Cl'enet;R. Davies;P. D. Zeeuw;J. Dexter;A. Drescher;A. Eckart;F. Eisenhauer;N. F. Schreiber;F. Gao;P. Garcia;R. Genzel;S. Gillessen;D. Gratadour;S. Honig;D. Kaltenbrunner;M. Kishimoto;S. Lacour;D. Lutz;F. Millour;H. Netzer;T. Ott;T. Paumard;K. Perraut;G. Perrin;B. Peterson;P. Petrucci;O. Pfuhl;M. Prieto;D. Rouan;J. Sanchez-Bermudez;J. Shangguan;T. Shimizu;M. Schartmann;J. Stadler;A. Sternberg;O. Straub;C. Straubmeier;E. Sturm;L. Tacconi;K. Tristram;P. Vermot;S. Fellenberg;I. Waisberg;F. Widmann;J. Woillez
使用 VLTI/GRAVITY 和 SINFONI 数据，我们研究了 NGC 3783 托管的附近 1 型活动星系核 (AGN) 周围的亚秒差距气体和尘埃结构。GRAVITY 的 K 波段覆盖范围独特地允许同时分析宽线区域 (BLR) 的尺寸和运动学、近红外 (近红外) 连续发射热尘埃的尺寸和结构、 以及冠状线区域 (CLR) 的大小。我们发现，通过广泛的 Brγ 发射探测的 BLR 可以通过一个旋转的厚圆盘很好地描述，该圆盘的云径向分布在内部区域达到峰值。在我们的 BLR 模型中，16 光天的物理平均半径几乎是测量的 10 天时滞的两倍，这与混响映射测量的 10 天时滞非常匹配。我们测量了热尘埃的半高全宽 (FWHM) 大小为 0.74 mas (0.14 pc)，并进一步重建了热尘埃的图像，该图像揭示了微弱的（总通量的 5%）偏移云，我们将其解释为由中央 AGN 加热的吸积或流出云。最后，我们直接测量核 CLR 的 FWHM 大小，如 [Ca VIII] 和窄 Brγ 线所示。我们发现 FWHM 大小为 2.2 mas (0.4 pc)，完全符合位于 BLR 和窄线区域之间的 CLR 的预期。将所有这些测量结果与更大规模的近红外积分场单元和中红外干涉测量数据相结合，我们能够全面绘制 0.01 到 100 pc 的气体和灰尘的结构和动力学。
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.