Probing magnetic fields in the circumgalactic medium using polarization data from MIGHTEE

Astronomy and Astrophysics EDP Sciences 678 (2023) A56

Authors:

Kathrin Böckmann, Marcus Brüggen, Volker Heesen, Aritra Basu, Shane P O’Sullivan, Ian Heywood, M Jarvis, Anna Scaife, Jeroen Stil, R Taylor, Nj Adams, Raa Bowler, Madalina N Tudorache

Abstract:

Context. The properties and evolution of magnetic fields surrounding galaxies are observationally largely unconstrained. The detection and study of these magnetic fields is important to understand galaxy evolution since magnetic fields are tracers for dynamical processes in the circumgalactic medium (CGM) and can have a significant impact on the evolution of the CGM.
Aims. The Faraday rotation measure (RM) of the polarized light of background radio sources passing through the magnetized CGM of intervening galaxies can be used as a tracer for the strength and extent of magnetic fields around galaxies.
Methods. We used rotation measures observed by the MIGHTEE-POL (MeerKAT International GHz Tiered Extragalactic Exploration polarization) survey by MeerKAT in the XMM-LSS and COSMOS fields to investigate the RM around foreground star-forming galaxies. We used spectroscopic catalogs of star-forming and blue cloud galaxies to measure the RM of MIGHTEE-POL sources as a function of the impact parameter from the intervening galaxy. In addition, we examined the dependence of the RM on redshift. We then repeated this procedure using a deeper galaxy catalog with photometric redshifts.
Results. For the spectroscopic star-forming sample, we find a redshift-corrected |RM| excess of 5.6 ± 2.3 rad m−2 which corresponds to a 2.5σ significance around galaxies with a median redshift of z = 0.46 for impact parameters below 130 kpc only selecting the intervenor with the smallest impact parameter. Making use of a photometric galaxy catalog and taking into account all intervenors with Mg < −13.6 mag, the signal disappears. We find no indication for a correlation between redshift and RM, nor do we find a connection between the total number of intervenors to the total |RM|.
Conclusions. We have presented tentative evidence that the CGM of star-forming galaxies is permeated by coherent magnetic fields within the virial radius. We conclude that mostly bright, star-forming galaxies with impact parameters less than 130 kpc significantly contribute to the RM of the background radio source.

X-ray and Radio Monitoring of the Neutron Star Low Mass X-ray Binary 1A 1744-361: Quasi Periodic Oscillations, Transient Ejections, and a Disk Atmosphere

(2023)

Authors:

Mason Ng, Andrew K Hughes, Jeroen Homan, Jon M Miller, Sean N Pike, Diego Altamirano, Peter Bult, Deepto Chakrabarty, DJK Buisson, Benjamin M Coughenour, Rob Fender, Sebastien Guillot, Tolga Güver, Gaurava K Jaisawal, Amruta D Jaodand, Christian Malacaria, James CA Miller-Jones, Andrea Sanna, Gregory R Sivakoff, Tod E Strohmayer, John A Tomsick, Jakob van den Eijnden

Integrated and differential fiducial cross-section measurements for the vector boson fusion production of the Higgs boson in the H→WW*→eνμν decay channel at 13 TeV with the ATLAS detector

Physical Review D American Physical Society (APS) 108:7 (2023) 072003

Authors:

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M-S Barisits, T Barklow, P Baron, DA Baron Moreno, A Baroncelli, G Barone, AJ Barr, JD Barr, L Barranco Navarro, F Barreiro, J Barreiro Guimarães da Costa, U Barron, MG Barros Teixeira, S Barsov, F Bartels, R Bartoldus, AE Barton, P Bartos, A Basan, M Baselga, A Bassalat, MJ Basso, CR Basson, RL Bates, S Batlamous, JR Batley, B Batool, M Battaglia, D Battulga, M Bauce, M Bauer, P Bauer, LT Bazzano Hurrell, JB Beacham, T Beau, PH Beauchemin, F Becherer, P Bechtle, HP Beck, K Becker, AJ Beddall, VA Bednyakov, CP Bee, LJ Beemster, TA Beermann, M Begalli, M Begel, A Behera, JK Behr, JF Beirer, F Beisiegel, M Belfkir, G Bella, L Bellagamba, A Bellerive, P Bellos, K Beloborodov, NL Belyaev, D Benchekroun, F Bendebba, Y Benhammou, M Benoit, JR Bensinger, S Bentvelsen, L Beresford, M Beretta, E Bergeaas Kuutmann, N Berger, B Bergmann, J Beringer, G Bernardi, C Bernius, FU Bernlochner, F Bernon, T Berry, P Berta, A Berthold, IA Bertram, S Bethke, A Betti, AJ Bevan, M Bhamjee, S Bhatta, DS 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SN 2022jli: A Type Ic Supernova with Periodic Modulation of Its Light Curve and an Unusually Long Rise

The Astrophysical Journal Letters American Astronomical Society 956:1 (2023)

Authors:

T Moore, SJ Smartt, M Nicholl, S Srivastav, HF Stevance, DB Jess, SDT Grant, MD Fulton, L Rhodes, SA Sim, R Hirai, P Podsiadlowski, JP Anderson, C Ashall, W Bate, R Fender, CP Gutiérrez, DA Howell, ME Huber, C Inserra, G Leloudas, LAG Monard, TE Müller-Bravo, BJ Shappee, KW Smith, G Terreran, J Tonry, MA Tucker, DR Young, A Aamer, T-W Chen, F Ragosta, L Galbany, M Gromadzki, L Harvey, P Hoeflich, C McCully, M Newsome, EP Gonzalez, C Pellegrino, P Ramsden, M Pérez-Torres, EJ Ridley, X Sheng, J Weston

Abstract:

Moore et al.We present multiwavelength photometry and spectroscopy of SN 2022jli, an unprecedented Type Ic supernova discovered in the galaxy NGC 157 at a distance of ≈ 23 Mpc. The multiband light curves reveal many remarkable characteristics. Peaking at a magnitude of g = 15.11 ± 0.02, the high-cadence photometry reveals periodic undulations of 12.5 ± 0.2 days superimposed on the 200-day supernova decline. This periodicity is observed in the light curves from nine separate filter and instrument configurations with peak-to-peak amplitudes of ≃ 0.1 mag. This is the first time that repeated periodic oscillations, over many cycles, have been detected in a supernova light curve. SN 2022jli also displays an extreme early excess that fades over ≈25 days, followed by a rise to a peak luminosity of Lopt = 1042.1 erg s−1. Although the exact explosion epoch is not constrained by data, the time from explosion to maximum light is ≳ 59 days. The luminosity can be explained by a large ejecta mass (Mej ≈ 12 ± 6 M⊙) powered by 56Ni, but we find it difficult to quantitatively model the early excess with circumstellar interaction and cooling. Collision between the supernova ejecta and a binary companion is a possible source of this emission. We discuss the origin of the periodic variability in the light curve, including interaction of the SN ejecta with nested shells of circumstellar matter and neutron stars colliding with binary companions.ATLAS is primarily funded through NASA grants NN12AR55G, 80NSSC18K0284, and 80NSSC18K1575. The ATLAS science products are provided by the University of Hawaii, Queen's University Belfast, STScI, SAAO, and Millennium Institute of Astrophysics in Chile. M.N., S.S., A.A., and X.S. are supported by the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement No. 948381) and by UK Space Agency grant No. ST/Y000692/1. Lasair is supported by the UKRI Science and Technology Facilities Council and is a collaboration between the University of Edinburgh (grant ST/N002512/1) and QUB (grant ST/N002520/1) within the LSST:UK Science Consortium. ZTF is supported by National Science Foundation grant AST-1440341 and a collaboration including Caltech, IPAC, the Weizmann Institute for Science, the Oskar Klein Center at Stockholm University, the University of Maryland, the University of Washington, Deutsches Elektronen-Synchrotron and Humboldt University, Los Alamos National Laboratories, the TANGO Consortium of Taiwan, the University of Wisconsin at Milwaukee, and Lawrence Berkeley National Laboratories. This work is based on observations collected at the European Organisation for Astronomical Research in the Southern Hemisphere, Chile, as part of ePESSTO+ (the advanced Public ESO Spectroscopic Survey for Transient Objects Survey). ePESSTO+ observations were obtained under ESO program ID 108.220C (PI: Inserra). The Las Cumbres Observatory (LCO) data have been obtained via an OPTCON proposal (IDs: OPTICON 22A/004, 22B/002; European Union's Horizon 2020 grant agreement No. 730890), and the LCO team is supported by NSF grants AST-1911225 and AST-1911151. S.S., S.A.S., and S.J.S. acknowledge funding from STFC grants ST/X006506/1 and ST/T000198/1. D.B.J. and S.D.T.G. acknowledge funding from STFC grant awards ST/T00021X/1 and ST/X000923/1. D.B.J. and W.B. acknowledge support from the Leverhulme Trust via the Research Project Grant RPG-2019-371. L.G. and C.P.G. acknowledge financial support from the Spanish Ministerio de Ciencia e Innovación (MCIN), the Agencia Estatal de Investigación (AEI) 10.13039/501100011033, and the European Social Fund (ESF) "Investing in your future" under the 2019 Ramón y Cajal program RYC2019-027683-I; the Marie Skłodowska-Curie and the Beatriu de Pinós 2021 BP 00168 program and the PID2020-115253GA-I00 HOSTFLOWS project, from Centro Superior de Investigaciones Científicas (CSIC) under the PIE project 20215AT016; and the program Unidad de Excelencia María de Maeztu CEX2020-001058-M. We acknowledge funding from ANID, Millennium Science Initiative, ICN12_009. G.L. is supported by a research grant (19054) from VILLUM FONDEN. T.W.C. thanks the Yushan Young Fellow Program by the Ministry of Education, Taiwan for the financial support.With funding from the Spanish government through the "Severo Ochoa Centre of Excellence" accreditation (CEX2020-001058-M).Peer reviewe

The JWST Hubble Sequence: The Rest-frame Optical Evolution of Galaxy Structure at 1.5 < z < 6.5

The Astrophysical Journal American Astronomical Society 955:2 (2023) 94

Authors:

Leonardo Ferreira, Christopher J Conselice, Elizaveta Sazonova, Fabricio Ferrari, Joseph Caruana, Clár-Bríd Tohill, Geferson Lucatelli, Nathan Adams, Dimitrios Irodotou, Madeline A Marshall, Will J Roper, Christopher C Lovell, Aprajita Verma, Duncan Austin, James Trussler, Stephen M Wilkins