Zobrazeno 1 - 10
of 136
pro vyhledávání: '"Willem A. Baan"'
Autor:
Mengke Zhao, Jianjun Zhou, Willem A. Baan, Yue Hu, A. Lazarian, Xindi Tang, Jarken Esimbek, Yuxin He, Dalei Li, Weiguang Ji, Zhengxue Chang, Kadirya Tursun
Publikováno v:
The Astrophysical Journal, Vol 967, Iss 1, p 18 (2024)
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 Gradient Technique on CO spectroscopic data from the ALMA-PHANGS, the magnetic field of NGC
Externí odkaz:
https://doaj.org/article/b8c2f9e280314bcf87b0aa764dc610cd
Autor:
Xiaolong Yang, Su Yao, Luigi C. Gallo, Jun Yang, Luis C. Ho, Minfeng Gu, Willem A. Baan, Jiri Svoboda, Ran Wang, Xiang Liu, Xiaoyu Hong, Xue-Bing Wu, Wei Zhao
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 2, p 151 (2024)
Accretion of black holes at near-Eddington or super-Eddington rates represents the most powerful episode driving black hole growth, potentially occurring across various types of objects. However, the physics governing accretion and jet–disk couplin
Externí odkaz:
https://doaj.org/article/c82bc30421594cc19eb56d0bcb0abf55
Autor:
Ailing Wang, Tao An, Shaoguang Guo, Prashanth Mohan, Wara Chamani, Willem A. Baan, Talvikki Hovatta, Heino Falcke, Tim J. Galvin, Natasha Hurley-Walker, Sumit Jaiswal, Anne Lahteenmaki, Baoqiang Lao, Weijia Lv, Merja Tornikoski, Yingkang Zhang
Publikováno v:
The Astrophysical Journal, Vol 944, Iss 2, p 187 (2023)
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 properties of the radio-intermediate quasar III Zw 2. We detect two jet knots, J1 and J2, on parsec
Externí odkaz:
https://doaj.org/article/6684ecacbdbc40d5a2eaa14eb1c02f17
Autor:
Ailing Wang, Tao An, Shaoguang Guo, Luis C Ho, Willem A Baan, Robert Braun, Sina Chen, Xiaopeng Cheng, Philippa Hartley, Jun Yang, Yingkang Zhang
Publikováno v:
Monthly Notices of the Royal Astronomical Society: Letters. 523:L30-L34
Measuring the proper motion of the emission component in radio-quiet quasars (RQQs) could help to distinguish between the origins of the radio emission and to understand whether the jet production mechanism is the same in radio-loud quasars (RLQs) an
Publikováno v:
Nature Astronomy. 6:976-983
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 the amplified emission are unclear. A detailed view of these regions is possible using t
Autor:
Willem A. Baan
This paper presents an overview of methods for mitigating radio frequency interference (RFI) in radio science data. The primary purpose of mitigation is to assist observatories to take useful data outside frequency bands allocated to the Science Serv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7e46274e76ed57565c7306f143daf973
Autor:
M. Olech, B. Stecklum, A. M. Sobolev, Ross A. Burns, Todd R. Hunter, James O. Chibueze, Willem A. Baan, B. Kramer, Gabor Orosz, G. C. MacLeod, G. Surcis, S. P. van den Heever, Yoshinori Yonekura, Tomoya Hirota, Lucas J. Hyland, Crystal L. Brogan, H. Linz, Chris Phillips, Kee-Tae Kim, J. Eislöffel, Simon Ellingsen, A. Caratti o Garatti, Koichiro Sugiyama
High-mass stars are thought to accumulate much of their mass via short, infrequent bursts of disk-aided accretion. Such accretion events are rare and difficult to observe directly but are known to drive enhanced maser emission. In this Letter we repo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::40beb0a4bb39e530416c91a7c5c81952
Autor:
Ailing Wang, Tao An, Xiaopeng Cheng, Luis C Ho, Kenneth I Kellermann, Willem A Baan, Jun Yang, Yingkang Zhang
We observed 20 Palomar-Green (PG) quasars at low redshift ($z 1 mJy, including 4 radio-loud quasars (RLQs) and 16 radio-quiet quasars (RQQs), using the Very Long Baseline Array (VLBA) at 5 GHz. Ten RQQs are clearly detected in the VLBA images, and a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b8a30d427177b952a99bcc32c6d8d3df
http://arxiv.org/abs/2210.16764
http://arxiv.org/abs/2210.16764
Autor:
Tao An, Xiaolong Yang, Yingkang Zhang, Yuchan Wang, Ailing Wang, Sumit Jaiswal, Prashanth Mohan, Willem A. Baan
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 504:3823-3830
Mrk~231 is the closest radio-quiet quasar known and one of the most luminous infrared galaxies in the local Universe. It is characterised by the co-existence of a radio jet and powerful multi-phase multi-scale outflows, making it an ideal laboratory
Autor:
David A. Green, Elmar Körding, Susanne Aalto, David R. Williams, Bililign T. Dullo, Alison B. Peck, Ranieri D. Baldi, C. Romero-Cañizales, Willem A. Baan, I. M. McHardy, Megan Argo, Eskil Varenius, Antxon Alberdi, Miguel A. Pérez-Torres, Payaswini Saikia, Francesca Panessa, Stephane Corbel, John S. Gallagher, Martin Ward, R. C. Kennicutt, George J. Bendo, Jeremy Yates, Francesco Shankar, P. Uttley, Hans-Rainer Klöckner, Ralph Spencer, T. J. Maccarone, Johan H. Knapen, Ian R. Stevens, Danielle Fenech, T. W. B. Muxlow, C. G. Mundell, Robert Beswick, Elias Brinks
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, 2020, 500 (4), pp.4749-4767. ⟨10.1093/mnras/staa3519⟩
Digital.CSIC: Repositorio Institucional del CSIC
Consejo Superior de Investigaciones Científicas (CSIC)
Monthly Notices of the Royal Astronomical Society, 500, 4, pp. 4749-4767
E-Prints Complutense. Archivo Institucional de la UCM
instname
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2020, 500 (4), pp.4749-4767. ⟨10.1093/mnras/staa3519⟩
Digital.CSIC. Repositorio Institucional del CSIC
E-Prints Complutense: Archivo Institucional de la UCM
Universidad Complutense de Madrid
Monthly Notices of the Royal Astronomical Society, 500, 4749-4767
Monthly Notices of the Royal Astronomical Society, 2020, 500 (4), pp.4749-4767. ⟨10.1093/mnras/staa3519⟩
Digital.CSIC: Repositorio Institucional del CSIC
Consejo Superior de Investigaciones Científicas (CSIC)
Monthly Notices of the Royal Astronomical Society, 500, 4, pp. 4749-4767
E-Prints Complutense. Archivo Institucional de la UCM
instname
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2020, 500 (4), pp.4749-4767. ⟨10.1093/mnras/staa3519⟩
Digital.CSIC. Repositorio Institucional del CSIC
E-Prints Complutense: Archivo Institucional de la UCM
Universidad Complutense de Madrid
Monthly Notices of the Royal Astronomical Society, 500, 4749-4767
Full list of authors: Baldi, R. D.; Williams, D. R. A.; McHardy, I. M.; Beswick, R. J.; Brinks, E.; Dullo, B. T.; Knapen, J. H.; Argo, M. K.; Aalto, S.; Alberdi, A.; Baan, W. A.; Bendo, G. J.; Corbel, S.; Fenech, D. M.; Gallagher, J. S.; Green, D. A.