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High-resolution observations with the Swedish 1-m Solar Telescope (SST) and the Solar Dynamics Observatory (SDO) reveal rotating magnetic field structures that extend from the solar surface into the chromosphere and the corona. These…

Solar and Stellar Astrophysics · Physics 2015-06-22 Sven Wedemeyer , Oskar Steiner

We find in a detailed morphological study (at 15 pc resolution) that the extended massive star formation process, shows: (i) extended triple asymmetrical spiral arms structure (r = 5 kpc); and (ii) the spiral arms emanate from three…

Astrophysics · Physics 2009-10-31 S. Lipari , R. Diaz , Y. Taniguchi , R. Terlevich , H. Dottori , G. Carranza

We explore the amplification of magnetic fields in the high-redshift Universe. For this purpose, we perform high-resolution cosmological simulations following the formation of primordial halos with \sim10^7 M_solar, revealing the presence…

High resolution spectropolarimetric observations of the strongly magnetic, super-slowly rotating rapidly oscillating Ap star HD166473 are used to investigate the implications of the presence of a variable strong magnetic field on the…

Solar and Stellar Astrophysics · Physics 2020-10-07 S. P. Järvinen , S. Hubrig , G. Mathys , V. Khalack , I. Ilyin , H. Adigozalzade

We investigate the possibility for the SKA to detect and study the magnetic fields in galaxy clusters and in the less dense environments surrounding them using Faraday Rotation Measures. To this end, we produce 3-dimensional magnetic field…

We consider strongly stratified forced turbulence in a plane-parallel layer with helicity and corresponding large-scale dynamo action in the lower part and non-helical turbulence in the upper. The magnetic field is found to develop strongly…

Solar and Stellar Astrophysics · Physics 2016-05-23 Sarah Jabbari , Axel Brandenburg , Dhrubaditya Mitra , Nathan Kleeorin , Igor Rogachevskii

This paper presents a detailed analysis of two-armed spiral structure in a sample of galax- ies from the Spitzer Infrared Nearby Galaxies Survey (SINGS), with particular focus on the relationships between the properties of the spiral…

Astrophysics of Galaxies · Physics 2015-06-23 S. Kendall , C. Clarke , R. C. Kennicutt

We present Rotation Measures (RM) of the diffuse Galactic synchrotron emission from the Canadian Galactic Plane Survey (CGPS) and compare them to RMs of extragalactic sources in order to study the large-scale reversal in the Galactic…

Astrophysics of Galaxies · Physics 2017-07-07 A. Ordog , J. C. Brown , R. Kothes , T. L. Landecker

We present MUSE integral field spectroscopic data of the S0 galaxy NGC 3115 obtained during the instrument commissioning at the ESO Very Large Telescope (VLT). We analyse the galaxy stellar kinematics and stellar populations and present two…

Astrophysics of Galaxies · Physics 2016-07-06 Adrien Guérou , Eric Emsellem , Davor Krajnović , Richard M. McDermid , Thierry Contini , Peter M. Weilbacher

NGC 1624-2 is the most strongly magnetized O-type star known. Previous spectroscopic observations of this object in the ultraviolet provided evidence that it hosts a large and dense circumstellar magnetosphere. Follow-up observations…

Solar and Stellar Astrophysics · Physics 2021-01-12 A. David-Uraz , V. Petit , M. E. Shultz , A. W. Fullerton , C. Erba , Z. Keszthelyi , S. Seadrow , G. A. Wade

In this review we discuss self-consistent methods to calculate the global structure of strongly magnetised neutron stars within the general-relativistic framework. We outline why solutions in spherical symmetry cannot be applied to strongly…

Nuclear Theory · Physics 2021-09-01 Debarati Chatterjee , Jerome Novak , Micaela Oertel

We report 850 $\mu$m continuum polarization observations toward the filamentary high-mass star-forming region NGC 2264, taken as part of the B-fields In STar forming Regions Observations (BISTRO) large program on the James Clerk Maxwell…

Solar and Stellar Astrophysics · Physics 2024-01-24 Jia-Wei Wang , Patrick M. Koch , Seamus D. Clarke , Gary Fuller , Nicolas Peretto , Ya-Wen Tang , Hsi-Wei Yen , Shih-Ping Lai , Nagayoshi Ohashi , Doris Arzoumanian , Doug Johnstone , Ray Furuya , Shu-ichiro Inutsuka , Chang Won Lee , Derek Ward-Thompson , Valentin J. M. Le Gouellec , Hong-Li Liu , Lapo Fanciullo , Jihye Hwang , Kate Pattle , Frédérick Poidevin , Mehrnoosh Tahani , Takashi Onaka , Mark G. Rawlings , Eun Jung Chung , Junhao Liu , A-Ran Lyo , Felix Priestley , Thiem Hoang , Motohide Tamura , David Berry , Pierre Bastien , Tao-Chung Ching , Simon Coudé , Woojin Kwon , Mike Chen , Chakali Eswaraiah , Archana Soam , Tetsuo Hasegawa , Keping Qiu , Tyler L. Bourke , Do-Young Byun , Zhiwei Chen , Huei-Ru Vivien Chen , Wen Ping Chen , Jungyeon Cho , Minho Choi , Yunhee Choi , Youngwoo Choi , Antonio Chrysostomou , Sophia Dai , James Di Francesco , Pham Ngoc Diep , Yasuo Doi , Yan Duan , Hao-Yuan Duan , David Eden , Jason Fiege , Laura M. Fissel , Erica Franzmann , Per Friberg , Rachel Friesen , Tim Gledhill , Sarah Graves , Jane Greaves , Matt Griffin , Qilao Gu , Ilseung Han , Saeko Hayashi , Martin Houde , Tsuyoshi Inoue , Kazunari Iwasaki , Il-Gyo Jeong , Vera Könyves , Ji-hyun Kang , Miju Kang , Janik Karoly , Akimasa Kataoka , Koji Kawabata , Zacariyya Khan , Mi-Ryang Kim , Kee-Tae Kim , Kyoung Hee Kim , Shinyoung Kim , Jongsoo Kim , Hyosung Kim , Gwanjeong Kim , Florian Kirchschlager , Jason Kirk , Masato I. N. Kobayashi , Takayoshi Kusune , Jungmi Kwon , Kevin Lacaille , Chi-Yan Law , Sang-Sung Lee , Hyeseung Lee , Jeong-Eun Lee , Chin-Fei Lee , Dalei Li , Hua-bai Li , Guangxing Li , Di Li , Sheng-Jun Lin , Tie Liu , Sheng-Yuan Liu , Xing Lu , Steve Mairs , Masafumi Matsumura , Brenda Matthews , Gerald Moriarty-Schieven , Tetsuya Nagata , Fumitaka Nakamura , Hiroyuki Nakanishi , Nguyen Bich Ngoc , Geumsook Park , Harriet Parsons , Tae-Soo Pyo , Lei Qian , Ramprasad Rao , Jonathan Rawlings , Brendan Retter , John Richer , Andrew Rigby , Sarah Sadavoy , Hiro Saito , Giorgio Savini , Masumichi Seta , Ekta Sharma , Yoshito Shimajiri , Hiroko Shinnaga , Xindi Tang , Hoang Duc Thuong , Kohji Tomisaka , Le Ngoc Tram , Yusuke Tsukamoto , Serena Viti , Hongchi Wang , Anthony Whitworth , Jintai Wu , Jinjin Xie , Meng-Zhe Yang , Hyunju Yoo , Jinghua Yuan , Hyeong-Sik Yun , Tetsuya Zenko , Chuan-Peng Zhang , Yapeng Zhang , Guoyin Zhang , Jianjun Zhou , Lei Zhu , Ilse de Looze , Philippe André , C. Darren Dowell , Stewart Eyres , Sam Falle , Jean-François Robitaille , Sven van Loo

We observed NGC 1624-2, the O-type star with the largest known magnetic field Bp~20 kG), in X-rays with the ACIS-S camera onboard the Chandra X-ray Observatory. Our two observations were obtained at the minimum and maximum of the periodic…

Solar and Stellar Astrophysics · Physics 2020-12-09 V. Petit , D. H. Cohen , G. A. Wade , Y. Nazé , S. P. Owocki , J. O. Sundqvist , A. ud-Doula , A. Fullerton , M. Leutenegger , M. Gagné

In theoretical investigations, various mechanisms have been put forward to explain the emergence of spiral patterns in galaxies. One of the few ways to find out the nature of spirals in a particular galaxy is to consider the so-called…

Astrophysics of Galaxies · Physics 2025-03-26 V. Kostiuk , A. Marchuk , A. Gusev , I. Chugunov

[Abridged] Filaments and hubs have received special attention recently thanks to studies showing their role in star formation. While the column density and velocity structures of both filaments and hubs have been studied, their magnetic…

Astrophysics of Galaxies · Physics 2021-03-17 D. Arzoumanian , R. Furuya , T. Hasegawa , M. Tahani , S. Sadavoy , C. L. H. Hull , D. Johnstone , P. M. Koch , S. -i. Inutsuka , Y. Doi , T. Hoang , T. Onaka , K. Iwasaki , Y. Shimajiri , T. Inoue , N. Peretto , P. André , P. Bastien , D. Berry , H. -R. V. Chen , J. Di Francesco , C. Eswaraiah , L. Fanciullo , L. M. Fissel , J. Hwang , J. -h. Kang , G. Kim , K. -T. Kim , F. Kirchschlager , W. Kwon , C. W. Lee , H. -L. Liu , A. -R. Lyo , K. Pattle , A. Soam , X. Tang , A. Whitworth , T. -C. Ching , S. Coudé , J. -W. Wang , D. Ward-Thompson , S. -P. Lai , K. Qiu , T. L. Bourke , D. -Y. Byun , M. Chen , Z. Chen , W. P. Chen , J. Cho , Y. Choi , M. Choi , A. Chrysostomou , E. J. Chung , S. Dai , P. N. Diep , H. -Y. Duan , Y. Duan , D. Eden , J. Fiege , E. Franzmann , P. Friberg , G. Fuller , T. Gledhill , S. Graves , J. Greaves , M. Griffin , Q. Gu , I. Han , J. Hatchell , S. Hayashi , M. Houde , I. -G. Jeong , M. Kang , S. -j. Kang , A. Kataoka , K. Kawabata , F. Kemper , M. -R. Kim , K. H. Kim , J. Kim , S. Kim , J. Kirk , M. I. N. Kobayashi , V. Konyves , T. Kusune , J. Kwon , K. Lacaille , C. -Y. Law , C. -F. Lee , Y. -H. Lee , S. -S. Lee , H. Lee , J. -E. Lee , H. -b. Li , D. Li , J. Liu , T. Liu , S. -Y. Liu , X. Lu , S. Mairs , M. Matsumura , B. Matthews , G. Moriarty-Schieven , T. Nagata , F. Nakamura , H. Nakanishi , N. B. Ngoc , N. Ohashi , G. Park , H. Parsons , T. -S. Pyo , L. Qian , R. Rao , J. Rawlings , M. Rawlings , B. Retter , J. Richer , A. Rigby , H. Saito , G. Savini , A. Scaife , M. Seta , H. Shinnaga , M. Tamura , Y. -W. Tang , K. Tomisaka , L. N. Tram , Y. Tsukamoto , S. Viti , H. Wang , J. Xie , H. -W. Yen , H. Yoo , J. Yuan , H. -S. Yun , T. Zenko , G. Zhang , C. -P. Zhang , Y. Zhang , J. Zhou , L. Zhu , I. de Looze , C. D. Dowell , S. Eyres , S. Falle , R. Friesen , J. -F. Robitaille , S. van Loo

We search for observational signatures of magnetic helicity in data from all-sky radio polarization surveys of the Milky Way Galaxy. Such a detection would help confirm the dynamo origin of the field and may provide new observational…

Astrophysics of Galaxies · Physics 2020-10-14 J. L. West , R. N. Henriksen , K. Ferrière , A. Woodfinden , T. Jaffe , B. M. Gaensler , J. A. Irwin

Theories on the origin of magnetic fields in massive stars remain poorly developed, because the properties of their magnetic field as function of stellar parameters could not yet be investigated. To investigate whether magnetic fields in…

Magnetic fields in the intracluster medium (ICM) affect the structure and the evolution of galaxy clusters. However, their properties are largely unknown, and measuring magnetic fields in galaxy clusters is challenging, especially on…

Astrophysics of Galaxies · Physics 2020-10-14 Yue Hu , A. Lazarian , Yuan Li , Irina Zhuravleva , Marie-Lou Gendron-Marsolais

Magnetic fields pervade in the interstellar medium (ISM) and are believed to be important in the process of star formation, yet probing magnetic fields in star formation regions is challenging. We propose a new method to use Faraday…

Astrophysics of Galaxies · Physics 2018-06-27 M. Tahani , R. Plume , J. C. Brown , J. Kainulainen

SOFIA/HAWC+ 154 $\mu$m Far-Infrared polarimetry observations of the well-studied edge-on galaxy NGC 891 are analyzed and compared to simple disk models with ordered (planar) and turbulent magnetic fields. The overall low magnitude and the…

Astrophysics of Galaxies · Physics 2023-05-10 Jin-Ah Kim , Terry Jay Jones , C. Darren Dowell
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