Article
Astronomy & Astrophysics
Stella Koch Ocker, James M. Cordes, Shami Chatterjee, Chen-Hui Niu, Di Li, James W. McKee, Casey J. Law, Chao-Wei Tsai, Reshma Anna-Thomas, Ju-Mei Yao, Marilyn Cruces
Summary: The repeating fast radio burst FRB 20190520B is localized to a nearby galaxy. The observed dispersion measure and scattering phenomena provide support for a novel technique for estimating FRB redshifts and are consistent with previous findings.
ASTROPHYSICAL JOURNAL
(2022)
Article
Multidisciplinary Sciences
Dongzi Li, Anna Bilous, Scott Ransom, Robert Main, Yuan-Pei Yang
Summary: Spider pulsars are millisecond pulsars with short-period orbits and low-mass companion stars. The magnetic field of the companion strongly influences the evolution of the binary system and the pulsar emission properties. The magnetic field in the spider system increases near the eclipse, as evidenced by changes in rotation measure.
Review
Physics, Multidisciplinary
Di Xiao, FaYin Wang, ZiGao Dai
Summary: FRB, as a new branch in astrophysics, has seen significant progress with the discovery of hundreds of new events through improved instruments. Understanding of FRB has been rapidly increasing as new observational data accumulate.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2021)
Review
Astronomy & Astrophysics
Manisha Caleb, Evan Keane
Summary: Fast radio bursts (FRBs) have been a subject of excitement and controversy since their discovery in 2007, with various theories proposed for their origin. Recent observations of FRB-like pulses from Galactic magnetars have led to magnetar engine models emerging as the leading theory in understanding these mysterious phenomena. Overall, FRB pulses offer unique characteristics for probing magnetic field strengths, interstellar media inhomogeneities, and plasma turbulence, making them important tools for studying the Universe.
Article
Astronomy & Astrophysics
S. Purkayastha, N. Kanekar, J. N. Chengalur, S. Malhotra, J. Rhoads, T. Ghosh
Summary: Green Pea galaxies are low-redshift starburst dwarf galaxies with properties similar to those of high-redshift galaxies, and they have a high leakage of Lyman-continuum radiation. The mapping of the spatial distribution of atomic hydrogen (Hi) in and around a Green Pea galaxy, GP J0213+0056, reveals an extended broken-ring structure and little Hi emission from the Green Pea itself. The merger between GP J0213+0056 and its companion likely triggered the starburst and caused the disturbed Hi distribution, allowing Lyman-continuum emission to escape.
ASTROPHYSICAL JOURNAL LETTERS
(2022)
Article
Astronomy & Astrophysics
Vikram Ravi, Morgan Catha, Ge Chen, Liam T. Connor, Jakob T. W. Faber, James W. Lamb, Gregg Hallinan, Charlie Harnach, Greg Hellbourg, Rick Hobbs, David Hodge, Mark Hodges, Casey Law, Paul Rasmussen, Kritti B. Sharma, Myles B. Sherman, Jun Shi, Dana Simard, Reynier Squillace, Sander P. Weinreb, David P. Woody, Nitika Yadlapalli, Dillon Deep Synoptic Array team, Tomas Ahumada, Dillon Dong, Christoffer Fremling, Yuping M. Huang, Viraj Karambelkar, Jessie M. Miller
Summary: We detected and localized the repeating FRB source FRB 20220912A using the DSA-110. Two bursts were observed on October 18 and October 25, 2022. The best-fit position is (R.A. J2000, decl. J2000) = (23:09:04.9, +48:42:25.4), with a 90% confidence error ellipse. The source is likely viewed through a tenuous plasma column in the host galaxy PSO J347.2702+48.7066.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Astronomy & Astrophysics
M. Caleb, L. N. Driessen, A. C. Gordon, N. Tejos, L. Bernales, H. Qiu, J. O. Chibueze, B. W. Stappers, K. M. Rajwade, F. Cavallaro, Y. Wang, P. Kumar, W. A. Majid, R. S. Wharton, C. J. Naudet, M. C. Bezuidenhout, F. Jankowski, M. Malenta, V Morello, S. Sanidas, M. P. Surnis, E. D. Barr, W. Chen, M. Kramer, W. Fong, C. D. Kilpatrick, J. Xavier Prochaska, S. Simha, C. Venter, I Heywood, A. Kundu, F. Schussler
Summary: We discovered FRB 20210410D using the MeerKAT radio interferometer in South Africa within the MeerTRAP commensal project. The FRB has a dispersion measure of DM = 578.78 +/- 2 pc cm(-3) and was localized accurately in the 2 s images. It was found to be associated with an optical galaxy at z = 0.1415, indicating a significant DM contribution from the host galaxy.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Arpita Misra, Marek Jamrozy, Marek Wezgowiec
Summary: This study investigates the unique radio galaxy J1159+5820, which displays an X-shaped radio morphology accompanied by a distinct tidal tail feature in its host CGCG 292-057, indicating a post-merger system. The radio spectra of lobes and wings are fitted with particle injection models, and spectral ageing analysis suggests a fast jet realignment model with a reorientation time-scale of a few million years. The possible mechanisms for the formation of the radio morphology are discussed.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Physics, Multidisciplinary
Bo-Jun Wang, Heng Xu, Jin-Chen Jiang, Jiang-Wei Xu, Jia-Rui Niu, Ping Chen, Ke-Jia Lee, Bing Zhang, Wei-Wei Zhu, Su-Bo Dong, Chun-Feng Zhang, Hai Fu, De-Jiang Zhou, Yong-Kun Zhang, Pei Wang, Yi Feng, Ye Li, Dong-Zi Li, Wen-Bin Lu, Yuan-Pei Yang, R. N. Caballero, Ce Cai, Mao-Zheng Chen, Zi-Gao Dai, A. Esamdin, Heng-Qian Gan, Jin-Lin Han, Long-Fei Hao, Yu-Xiang Huang, Peng Jiang, Cheng-Kui Li, Di Li, Hui Li, Xin-Qiao Li, Zhi-Xuan Li, Zhi-Yong Liu, Rui Luo, Yun-Peng Men, Chen-Hui Niu, Wen-Xi Peng, Lei Qian, Li-Ming Song, Jing-Hai Sun, Fa-Yin Wang, Min Wang, Na Wang, Wei-Yang Wang, Xue-Feng Wu, Shuo Xiao, Shao-Lin Xiong, Yong-Hua Xu, Ren-Xin Xu, Jun Yang, Xuan Yang, Rui Yao, Qi-Bin Yi, You-Ling Yue, Dong-Jun Yu, Wen-Fei Yu, Jian-Ping Yuan, Bin-Bin Zhang, Song-Bo Zhang, Shuang-Nan Zhang, Yi Zhao, Wei-Kang Zheng, Yan Zhu, Jin-Hang Zou
Summary: In this paper, a collection of 1863 burst dynamic spectra of FRB 20201124A measured with the FAST telescope is presented. This dataset represents the largest sample of pulses detected for any FRB so far.
Review
Astronomy & Astrophysics
E. Petroff, J. W. T. Hessels, D. R. Lorimer
Summary: Since the discovery of the first fast radio burst (FRB) in 2007, the study of FRBs has expanded rapidly. Recent observations have provided a wealth of information about FRBs, including their abundance, repeaters, host galaxies, and source activity. Surprising discoveries, such as the connection between FRBs and magnetars and the localization of FRBs to specific clusters, have also been made.
ASTRONOMY AND ASTROPHYSICS REVIEW
(2022)
Article
Astronomy & Astrophysics
Erin Kimbro, Amy E. Reines, Mallory Molina, Adam T. Deller, Daniel Stern
Summary: The study provides a detailed investigation of star formation and BH activity in the low-metallicity dwarf-dwarf galaxy merger Mrk 709, revealing that the two dwarf galaxies are likely in the early stages of a merger and the southern galaxy is undergoing clumpy star formation resembling that seen in high-redshift galaxies. Additionally, evidence for a low-luminosity AGN in Mrk 709 S is presented, including the detection of the coronal [Fe x] optical emission line.
ASTROPHYSICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
Huimei Wang, Xueli Miao, Lijing Shao
Summary: The study analyzes time delays to measure or constrain the photon mass using Fast Radio Bursts as an astrophysical laboratory. Utilizing a Bayesian framework with a catalog of 129 FRBs, a new bound on photon mass is obtained, providing the best limit purely from kinematic analysis of light propagation. This constraint is expected to tighten further in the future with advancements in FRBs research.
Article
Multidisciplinary Sciences
Yu-Ching Chen, Xin Liu, Adi Foord, Yue Shen, Masamune Oguri, Nianyi Chen, Tiziana Di Matteo, Miguel Holgado, Hsiang-Chih Hwang, Nadia Zakamska
Summary: The study reports a kiloparsec-scale dual-quasar system hosted by a galaxy merger at cosmic noon, which is hosted by massive compact disk-dominated galaxies, suggesting the possibility of SMBH formation before their host stellar bulges.
Article
Physics, Multidisciplinary
Wei-Yang Wang, Jin-Chen Jiang, Jiguang Lu, Heng Xu, Jiangwei Xu, Kejia Lee, Jifeng Liu, Renxin Xu
Summary: This study revisits the polarized FRB emission and investigates the production mechanisms of highly circular polarization. By deriving the intrinsic mechanism and propagative effect, it is found that the coherent summation of waves generated or scattered by bunches can naturally explain highly circular polarization. This has important implications for future observations.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2022)
Article
Astronomy & Astrophysics
David Alonsa
Summary: We study the impact of linear order cosmological perturbations on the dispersion measure (DM) of electromagnetic pulses and calculate the power spectrum of DM-based cosmological observables. Most relativistic effects have limited impact on large angular scales and are negligible for ongoing and planned observational programs targeting fast radio bursts.