Search Results - "Baan, Willem A."

THE DYNAMIC EVOLUTION OF YOUNG EXTRAGALACTIC RADIO SOURCES by AN, Tao, BAAN, Willem A

“…The evolution of symmetric extragalactic radio sources can be characterized by four distinct growth stages of the radio luminosity versus size of the source…”
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Magnetic Field of Molecular Gas Measured with the Velocity Gradient Technique. II. Curved Magnetic Field in kpc-scale Bubble of NGC 628 by Zhao, Mengke, Zhou, Jianjun, Baan, Willem A., Hu, Yue, Lazarian, A., Tang, Xindi, Esimbek, Jarken, He, Yuxin, Li, Dalei, Ji, Weiguang, Chang, Zhengxue, Tursun, Kadirya

“…We report the detection of the ordered alignment between the magnetic field and kpc-scale bubbles in the nearby spiral galaxy, NGC 628. Applying the Velocity…”
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Interactions between the Jet and Disk Wind in Nearby Radio-intermediate Quasar III Zw 2 by Wang, Ailing, An, Tao, Guo, Shaoguang, Mohan, Prashanth, Chamani, Wara, Baan, Willem A., Hovatta, Talvikki, Falcke, Heino, Galvin, Tim J., Hurley-Walker, Natasha, Jaiswal, Sumit, Lahteenmaki, Anne, Lao, Baoqiang, Lv, Weijia, Tornikoski, Merja, Zhang, Yingkang

“…Disk winds and jets are ubiquitous in active galactic nuclei (AGN), and how these two components interact remains an open question. We study the radio…”
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Unveiling the Small-scale Jets in the Rapidly Growing Supermassive Black Hole IZw1 by Yang, Xiaolong, Yao, Su, Gallo, Luigi C., Yang, Jun, Ho, Luis C., Gu, Minfeng, Baan, Willem A., Svoboda, Jiri, Wang, Ran, Liu, Xiang, Hong, Xiaoyu, Wu, Xue-Bing, Zhao, Wei

“…Accretion of black holes at near-Eddington or super-Eddington rates represents the most powerful episode driving black hole growth, potentially occurring…”
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Off-nuclear H2O maser and dense molecular gas in NGC 1068 by Hagiwara, Yoshiaki, Baan, Willem A, Imanishi, Masatoshi, Diamond, Philip

“…ABSTRACT The results of high-resolution spectral-line observations of dense molecular gas are presented towards the nuclear region of the type 2 Seyfert galaxy…”
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The obstructed jet in Mrk 231 by Wang, Ailing, An, Tao, Jaiswal, Sumit, Mohan, Prashanth, Wang, Yuchan, Baan, Willem A, Zhang, Yingkang, Yang, Xiaolong

“…ABSTRACT Mrk 231 is the closest radio-quiet quasar known and one of the most luminous infrared galaxies in the local Universe. It is characterized by the…”
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The nearby extreme accretion and feedback system PDS 456: finding a complex radio-emitting nucleus by Yang, Jun, Paragi, Zsolt, Nardini, Emanuele, Baan, Willem A, Fan, Lulu, Mohan, Prashanth, Varenius, Eskil, An, Tao

“…ABSTRACT When a black hole accretes close to the Eddington limit, the astrophysical jet is often accompanied by radiatively driven, wide-aperture and mildly…”
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Radio Activity of Supermassive Black Holes with Extremely High Accretion Rates by Yang, Xiaolong, Yao, Su, Yang, Jun, Ho, Luis C., An, Tao, Wang, Ran, Baan, Willem A., Gu, Minfeng, Liu, Xiang, Yang, Xiaofeng, Joshi, Ravi

“…Radio emission from the high- and super-Eddington accreting active galactic nuclei (AGNs) has various origins: a persistent jet, the magnetized corona, and the…”
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VLBI observations of a sample of Palomar–Green quasars – I. Parsec-scale morphology by Wang, Ailing, An, Tao, Cheng, Xiaopeng, Ho, Luis C, Kellermann, Kenneth I, Baan, Willem A, Yang, Jun, Zhang, Yingkang

“…We observed 20 Palomar–Green quasars at low redshift (z < 0.5) with total flux density >1 mJy, including four radio-loud quasars (RLQs) and 16 radio-quiet…”
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VLBI Observations of a sample of Palomar-Green quasars II: characterizing the parsec-scale radio emission by Wang, Ailing, An, Tao, Zhang, Yingkang, Cheng, Xiaopeng, Ho, Luis C, Kellermann, Kenneth I, Baan, Willem A

“…ABSTRACT This study uses multifrequency very long baseline interferometry (VLBI) to study the radio emission from 10 radio-quiet quasars (RQQs) and four…”
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A two-sided but significantly beamed jet in the supercritical accretion quasar IRAS F11119+3257 by Yang, Jun, Paragi, Zsolt, An, Tao, Baan, Willem A, Mohan, Prashanth, Liu, Xiang

“…ABSTRACT Highly accreting quasars are quite luminous in the X-ray and optical regimes; while, they tend to become radio quiet and have optically thin radio…”
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Magnetic Field of Molecular Gas Measured with the Velocity Gradient Technique I. Orion A by Zhao, Mengke, Zhou, Jianjun, Hu, Yue, Lazarian, A., Tang, Xindi, Baan, Willem A., Esimbek, Jarken, He, Yuxin, Li, Dalei, Ji, Weiguang, Tursun, Kadirya

“…Magnetic fields play an important role in the evolution of molecular clouds and star formation. Using the velocity gradient technique (VGT) model, we measured…”
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Mildly relativistic motion in the radio-quiet quasar PG 1351+640 by Wang, Ailing, An, Tao, Guo, Shaoguang, Ho, Luis C, Baan, Willem A, Braun, Robert, Chen, Sina, Cheng, Xiaopeng, Hartley, Philippa, Yang, Jun, Zhang, Yingkang

“…ABSTRACT Measuring the proper motion of the emission component in radio-quiet quasars (RQQs) could help to distinguish between the origins of the radio…”
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The OH Megamaser emission in Arp 220: the rest of the story by Baan, Willem A, Aditya, J N H S, An, Tao, Klöckner, Hans-Rainer

“…ABSTRACT The OH Megamaser emission in the merging galaxy Arp 220 has been re-observed with the Multi-Element Radio Linked Interferometer Network (MERLIN) and…”
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H2O MegaMaser emission in NGC 4258 indicative of a periodic disc instability by Baan, Willem A., An, Tao, Henkel, Christian, Imai, Hiroshi, Kostenko, Vladimir, Sobolev, Andrej

“…H 2 O MegaMaser emission may arise from thin gas discs surrounding the massive nuclei of galaxies such as NGC 4258, but the physical conditions responsible for…”
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Periodic radio variabilities in NRAO 530: a jet-disc connection? by An, Tao, Baan, Willem A., Wang, Jun-Yi, Wang, Yu, Hong, Xiao-Yu

“…Time series analysis techniques, Lomb-Scargle periodogram and weighted wavelet Z-transform, have been employed to search for year-time-scale periodicities from…”
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A radio structure resolved at the deca-parsec scale in the radio-quiet quasar PDS 456 with an extremely powerful X-ray outflow by Yang, Jun, An, Tao, Zheng, Fang, Baan, Willem A, Paragi, Zsolt, Mohan, Prashanth, Zhang, Zhongli, Liu, Xiang

“…Active galactic nuclei (AGNs) accreting at rates close to the Eddington limit can host radiatively driven mildly relativistic outflows. Some of these X-ray…”
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Periodic radio variabilities of the blazar 1156+295: harmonic oscillations by Wang, Jun-Yi, An, Tao, Baan, Willem A., Lu, Xiang-Long

“…(Quasi)-periodic oscillations of the radio luminosity of a typical blazar 1156+295 were analysed to investigate the dynamic processes associated with the…”
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The PARADIGM project I: a multiscale radio morphological analysis of local U/LIRGS by Lucatelli, Geferson, Beswick, Robert J, Moldón, Javier, Pérez-Torres, Miguel A, Conway, John E, Alberdi, Antxon, Romero-Cañizales, Cristina, Varenius, Eskil, Klöckner, Hans-Rainer, Barcos-Muñoz, Loreto, Bondi, Marco, Garrington, Simon T, Aalto, Susanne, Baan, Willem A, Pihlström, Ylva M

“…ABSTRACT Disentangling the radio flux contribution from star formation (SF) and active-galactic-nuclei (AGNs) activity is a long-standing problem in…”
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The comparison between H2CO and OH in the Milky Way by Guo, Wei Hua, Esimbek, Jarken, Di Tang, Xin, Zhou, Jian Jun, Baan, Willem A., Yuan, Ye, Wu, Gang, Zhang, Yan Jun, Komesh, Toktarkhan

“…A catalog of 4231 Galactic H 2 CO absorption lines ( ∼ 2241 sources) at 6 cm has been collected from the literature published up to 2014. The distribution of…”
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