Calibrating baryonic effects in cosmic shear with external data in the LSST era

(2025)

Authors:

Amy Wayland, David Alonso, Matteo Zennaro

Calibrating baryonic effects in cosmic shear with external data in the LSST era

Monthly Notices of the Royal Astronomical Society 91探花 University Press (OUP) 543:2 (2025) 1518-1534

Authors:

Amy Wayland, David Alonso, Matteo Zennaro

Abstract:

<jats:title>ABSTRACT</jats:title> <jats:p>Cosmological constraints derived from weak lensing (WL) surveys are limited by baryonic effects, which suppress the non-linear matter power spectrum on small scales. By combining WL measurements with data from external tracers of the gas around massive structures, it is possible to calibrate baryonic effects and, therefore, obtain more precise cosmological constraints. In this study, we generate mock data for a Stage-IV weak lensing survey such as the Legacy Survey of Space and Time (LSST), X-ray gas fractions, and stacked kinetic Sunyaev鈥揨el鈥檇ovich (kSZ) measurements, to jointly constrain cosmological and astrophysical parameters describing baryonic effects (using the Baryon Correction Model鈥揃CM). First, using WL data alone, we quantify the level to which the BCM parameters will need to be constrained to recover the cosmological constraints obtained under the assumption of perfect knowledge of baryonic feedback. We identify the most relevant baryonic parameters and determine that they must be calibrated to a precision of $\sim 10$鈥20 per鈥塩ent to avoid significant degradation of the fiducial WL constraints. We forecast that long-term X-ray data from $\mathcal {O}(5000)$ clusters should be able to reach this threshold for the parameters that characterize the abundance of hot virialized gas. Constraining the distribution of ejected gas presents a greater challenge, however, but we forecast that long-term kSZ data from a cosmic microwave background-S4-like experiment should achieve the level of precision required for full self-calibration.</jats:p>

A MeerKAT view of the parsec-scale jets in the black-hole X-ray binary GRS 1758-258

(2025)

Authors:

I Mariani, SE Motta, P Atri, JH Matthews, RP Fender, J Mart脙颅, PL Luque-Escamilla, I Heywood

Evidence for Longitudinally Polarized W Bosons in the Electroweak Production of Same-Sign W Boson Pairs in Association with Two Jets in pp Collisions at s=13 TeV with the ATLAS Detector

Physical Review Letters American Physical Society (APS) 135:11 (2025) 111802

Authors:

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Contreras Cossio, F Conventi, HG Cooke, AM Cooper-Sarkar, L Corazzina, FA Corchia, A Cordeiro Oudot Choi, LD Corpe, M Corradi, F Corriveau, A Cortes-Gonzalez, MJ Costa, F Costanza, D Costanzo, BM Cote, J Couthures, G Cowan, K Cranmer, L Cremer, D Cremonini, S Cr茅p茅-Renaudin, F Crescioli, T Cresta, M Cristinziani, M Cristoforetti, V Croft, JE Crosby, G Crosetti, A Cueto, H Cui, Z Cui, WR Cunningham, F Curcio, JR Curran, MJ Da Cunha Sargedas De Sousa, JV Da Fonseca Pinto, C Da Via, W Dabrowski, T Dado, S Dahbi, T Dai, D Dal Santo, C Dallapiccola, M Dam, G D鈥檃men, V D鈥橝mico, J Damp, JR Dandoy, D Dannheim, G D鈥檃nniballe, M Danninger, V Dao, G Darbo, SJ Das, F Dattola, S D鈥橝uria, A D鈥橝vanzo, T Davidek, J Davidson, I Dawson, K De, C De Almeida Rossi, R De Asmundis, N De Biase, S De Castro, N De Groot, P de Jong, H De la Torre, A De Maria, A De Salvo, U De Sanctis, F De Santis, A De Santo, JB De Vivie De Regie, J Debevc, DV Dedovich, J Degens, AM Deiana, J Del Peso, L Delagrange, F Deliot, CM 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ER Duden, M D鈥檜ffizi, L Duflot, M D眉hrssen, I Duminica, AE Dumitriu, M Dunford, S Dungs, K Dunne, A Duperrin, H Duran Yildiz, M D眉ren, A Durglishvili, D Duvnjak, GI Dyckes, M Dyndal, BS Dziedzic, ZO Earnshaw, GH Eberwein, B Eckerova, S Eggebrecht, E Egidio Purcino De Souza, G Eigen, K Einsweiler, T Ekelof, PA Ekman, S El Farkh, Y El Ghazali, H El Jarrari, A El Moussaouy, V Ellajosyula, M Ellert, F Ellinghaus, N Ellis, J Elmsheuser, M Elsawy, M Elsing, D Emeliyanov, Y Enari, I Ene, S Epari, D Ernani Martins Neto, F Ernst, M Errenst, M Escalier, C Escobar, E Etzion, G Evans, H Evans, LS Evans, A Ezhilov, S Ezzarqtouni, F Fabbri, L Fabbri, G Facini, V Fadeyev, RM Fakhrutdinov, D Fakoudis, S Falciano, LF Falda Ulhoa Coelho, F Fallavollita, G Falsetti, J Faltova, C Fan, KY Fan, Y Fan, Y Fang, M Fanti, M Faraj, Z Farazpay, A Farbin, A Farilla, T Farooque, JN Farr, SM Farrington, F Fassi, D Fassouliotis, L Fayard, P Federic, P Federicova, OL Fedin, M Feickert, L Feligioni, DE Fellers, C Feng, 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Garay Walls, C Garc铆a, A Garcia Alonso, AG Garcia Caffaro, JE Garc铆a Navarro, M Garcia-Sciveres, GL Gardner, RW Gardner, N Garelli, RB Garg, JM Gargan, CA Garner, CM Garvey, VK Gassmann, G Gaudio, V Gautam, P Gauzzi, J Gavranovic, IL Gavrilenko, A Gavrilyuk, C Gay, G Gaycken, EN Gazis, A Gekow, C Gemme, MH Genest, AD Gentry, S George, T Geralis, AA Gerwin, P Gessinger-Befurt, ME Geyik, M Ghani, K Ghorbanian, A Ghosal, A Ghosh, A Ghosh, B Giacobbe, S Giagu, T Giani, A Giannini, SM Gibson, M Gignac, DT Gil, AK Gilbert, BJ Gilbert, D Gillberg, G Gilles, DM Gingrich, MP Giordani, PF Giraud, G Giugliarelli, D Giugni, F Giuli, I Gkialas, LK Gladilin, C Glasman, M Glazewska, RM Gleason, G Glem啪a, M Glisic, I Gnesi, Y Go, M Goblirsch-Kolb, B Gocke, D Godin, B Gokturk, S Goldfarb, T Golling, MGD Gololo, D Golubkov, JP Gombas, A Gomes, G Gomes Da Silva, AJ Gomez Delegido, R Gon莽alo, L Gonella, A Gongadze, F Gonnella, JL Gonski, RY Gonz谩lez Andana, S Gonz谩lez de la Hoz, MV Gonzalez Rodrigues, R Gonzalez Suarez, S Gonzalez-Sevilla, L Goossens, B Gorini, E Gorini, A Gori拧ek, TC Gosart, AT Goshaw, MI Gostkin, S Goswami, CA Gottardo, SA Gotz, M Gouighri, AG Goussiou, N Govender, RP Grabarczyk, I Grabowska-Bold, K Graham, E Gramstad, S Grancagnolo, CM Grant, PM Gravila, FG Gravili, HM Gray, M Greco, MJ Green, C Grefe, AS Grefsrud, IM Gregor, KT Greif, P Grenier, SG Grewe, AA Grillo, K Grimm, S Grinstein, J-F Grivaz, E Gross, J Grosse-Knetter, L Guan, G Guerrieri, R Guevara, R Gugel, JAM Guhit, A Guida, E Guilloton, S Guindon, F Guo, J Guo, L Guo, L Guo, Y Guo, A Gupta, R Gupta, S Gupta, S Gurbuz, SS Gurdasani, G Gustavino, P Gutierrez, LF Gutierrez Zagazeta, M Gutsche, C Gutschow, C Gwenlan, CB Gwilliam, ES Haaland, A Haas, M Habedank, C Haber, HK Hadavand, A Haddad, A Hadef, AI Hagan, JJ Hahn, EH Haines, M Haleem, J Haley, GD Hallewell, L Halser, K Hamano, M Hamer, SED Hammoud, EJ Hampshire, J Han, L Han, L Han, S Han, K Hanagaki, M Hance, DA Hangal, H Hanif, MD Hank, JB Hansen, PH Hansen, D Harada, T Harenberg, S Harkusha, ML Harris, YT Harris, J Harrison, NM Harrison, PF Harrison, MLE Hart, NM Hartman, NM Hartmann, RZ Hasan, Y Hasegawa, F Haslbeck, S Hassan, R Hauser, M Haviernik, CM Hawkes, RJ Hawkings, Y Hayashi, D Hayden, C Hayes, RL Hayes, CP Hays, JM Hays, HS Hayward, M He, Y He, Y He, NB Heatley, V Hedberg, C Heidegger, KK Heidegger, J Heilman, S Heim, T Heim, JG Heinlein, JJ Heinrich, L Heinrich, J Hejbal, M Helbig, A Held, S Hellesund, CM Helling, S Hellman, AM Henriques Correia, H Herde, Y Hern谩ndez Jim茅nez, LM Herrmann, T Herrmann, G Herten, R Hertenberger, L Hervas, ME Hesping, NP Hessey, J Hessler, M Hidaoui, N Hidic, E Hill, TS Hillersoy, SJ Hillier, JR Hinds, F Hinterkeuser, M Hirose, S Hirose, D Hirschbuehl, TG Hitchings, B Hiti, J Hobbs, R Hobincu, N Hod, AM Hodges, MC Hodgkinson, BH Hodkinson, A Hoecker, DD Hofer, J Hofer, M Holzbock, LBAH Hommels, V Homsak, BP Honan, JJ Hong, TM Hong, BH Hooberman, WH Hopkins, MC Hoppesch, Y Horii, ME Horstmann, S Hou, MR Housenga, AS Howard, J Howarth, J Hoya, M Hrabovsky, T Hryn鈥檕va, PJ Hsu, S-C Hsu, T Hsu, M Hu, Q Hu, S Huang, X Huang, Y Huang, Y Huang, Y Huang, Y Huang, Z Huang, Z Hubacek, M Huebner, F Huegging, TB Huffman, M Hufnagel Maranha De Faria, CA Hugli, M Huhtinen, SK Huiberts, R Hulsken, CE Hultquist, N Huseynov, J Huston, J Huth, R Hyneman, G Iacobucci, G Iakovidis, L Iconomidou-Fayard, JP Iddon, P Iengo, R Iguchi, Y Iiyama, T Iizawa, Y Ikegami, D Iliadis, N Ilic, H Imam, G Inacio Goncalves, SA Infante Cabanas, T Ingebretsen Carlson, JM Inglis, G Introzzi, M Iodice, V Ippolito, RK Irwin, M Ishino, W Islam, C Issever, S Istin, K Itabashi, H Ito, R Iuppa, A Ivina, V Izzo, P Jacka, P Jackson, P Jain, K Jakobs, T Jakoubek, J Jamieson, W Jang, S Jankovych, M Javurkova, P Jawahar, L Jeanty, J Jejelava, P Jenni, CE Jessiman, C Jia, H Jia, J Jia, X Jia, Z Jia, C Jiang, Q Jiang, S Jiggins, M Jimenez Ortega, J Jimenez Pena, S Jin, A Jinaru, O Jinnouchi, P Johansson, KA Johns, JW Johnson, FA Jolly, DM Jones, E Jones, KS Jones, P Jones, RWL Jones, TJ Jones, HL Joos, R Joshi, J Jovicevic, X Ju, JJ Junggeburth, T Junkermann, A Juste Rozas, MK Juzek, S Kabana, A Kaczmarska, M Kado, H Kagan, M Kagan, A Kahn, C Kahra, T Kaji, E Kajomovitz, N Kakati, N Kakoty, I Kalaitzidou, S Kandel, NJ Kang, D Kar, K Karava, E Karentzos, O Karkout, SN Karpov, ZM Karpova, V Kartvelishvili, AN Karyukhin, E Kasimi, J Katzy, S Kaur, K Kawade, MP Kawale, C Kawamoto, T Kawamoto, EF Kay, FI Kaya, S Kazakos, VF Kazanin, JM Keaveney, R Keeler, GV Kehris, JS Keller, JJ Kempster, O Kepka, J Kerr, BP Kerridge, BP Ker拧evan, L Keszeghova, RA Khan, A Khanov, AG Kharlamov, T Kharlamova, EE Khoda, M Kholodenko, TJ Khoo, G Khoriauli, Y Khoulaki, J Khubua, YAR Khwaira, B Kibirige, D Kim, DW Kim, YK Kim, N Kimura, MK Kingston, A Kirchhoff, C Kirfel, F Kirfel, J Kirk, AE Kiryunin, S Kita, O Kivernyk, M Klassen, C Klein, L Klein, MH Klein, SB Klein, U Klein, A Klimentov, T Klioutchnikova, P Kluit, S Kluth, E Kneringer, TM Knight, A Knue, M Kobel, D Kobylianskii, SF Koch, M Kocian, P Kody拧, DM Koeck, T Koffas, O Kolay, I Koletsou, T Komarek, K K枚neke, AXY Kong, T Kono, N Konstantinidis, P Kontaxakis, B Konya, R Kopeliansky, S Koperny, K Korcyl, K Kordas, A Korn, S Korn, I Korolkov, N Korotkova, B Kortman, O Kortner, S Kortner, WH Kostecka, M Kostov, VV Kostyukhin, A Kotsokechagia, A Kotwal, A Koulouris, A Kourkoumeli-Charalampidi, C Kourkoumelis, E Kourlitis, O Kovanda, R Kowalewski, W Kozanecki, AS Kozhin, VA Kramarenko, G Kramberger, P Kramer, MW Krasny, A Krasznahorkay, AC Kraus, JW Kraus, JA Kremer, NB Krengel, T Kresse, L Kretschmann, J Kretzschmar, K Kreul, P Krieger, K Krizka, K Kroeninger, H Kroha, J Kroll, J Kroll, KS Krowpman, U Kruchonak, H Kr眉ger, N Krumnack, MC Kruse, O Kuchinskaia, S Kuday, S Kuehn, R Kuesters, T Kuhl, V Kukhtin, Y Kulchitsky, S Kuleshov, J Kull, EV Kumar, M Kumar, N Kumari, P Kumari, A Kupco, T Kupfer, A Kupich, O Kuprash, H Kurashige, LL 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Visibile, C Vittori, I Vivarelli, E Voevodina, F Vogel, JC Voigt, P Vokac, Yu Volkotrub, E Von Toerne, B Vormwald, K Vorobev, M Vos, K Voss, M Vozak, L Vozdecky, N Vranjes, M Vranjes Milosavljevic, M Vreeswijk, NK Vu, R Vuillermet, O Vujinovic, I Vukotic, IK Vyas, JF Wack, S Wada, C Wagner, JM Wagner, W Wagner, S Wahdan, H Wahlberg, CH Waits, J Walder, R Walker, K Walkingshaw Pass, W Walkowiak, A Wall, EJ Wallin, T Wamorkar, A Wang, AZ Wang, C Wang, C Wang, H Wang, J Wang, P Wang, P Wang, R Wang, R Wang, SM Wang, S Wang, T Wang, T Wang, WT Wang, W Wang, X Wang, X Wang, X Wang, Y Wang, Y Wang, Z Wang, Z Wang, Z Wang, C Wanotayaroj, A Warburton, AL Warnerbring, N Warrack, S Waterhouse, AT Watson, H Watson, MF Watson, E Watton, G Watts, BM Waugh, JM Webb, C Weber, HA Weber, MS Weber, SM Weber, C Wei, Y Wei, AR Weidberg, EJ Weik, J Weingarten, C Weiser, CJ Wells, T Wenaus, B Wendland, T Wengler, NS Wenke, N Wermes, M Wessels, AM Wharton, AS White, A White, MJ White, D Whiteson, L 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Zang, R Zanzottera, O Zaplatilek, C Zeitnitz, H Zeng, JC Zeng, DT Zenger, O Zenin, T 沤eni拧, S Zenz, D Zerwas, M Zhai, DF Zhang, G Zhang, J Zhang, J Zhang, K Zhang, L Zhang, L Zhang, P Zhang, R Zhang, S Zhang, T Zhang, Y Zhang, Y Zhang, Y Zhang, Y Zhang, Z Zhang, Z Zhang, H Zhao, T Zhao, Y Zhao, Z Zhao, Z Zhao, A Zhemchugov, J Zheng, K Zheng, X Zheng, Z Zheng, D Zhong, B Zhou, H Zhou, N Zhou, Y Zhou, Y Zhou, Y Zhou, CG Zhu, J Zhu, X Zhu, Y Zhu, Y Zhu, X Zhuang, K Zhukov, NI Zimine, J Zinsser, M Ziolkowski, L 沤ivkovi膰, A Zoccoli, K Zoch, A Zografos, TG Zorbas, O Zormpa, L Zwalinski

Abstract:

This Letter reports the first evidence of electroweak production of same-sign W boson pairs where at least one of the W bosons is longitudinally polarized and the most stringent constraint to date for the production of two longitudinally polarized same-sign W bosons. The dataset used corresponds to an integrated luminosity of 140 fb 1 of proton-proton collisions at a center-of-mass energy of 13聽TeV, collected with the ATLAS detector during run 2 of the Large Hadron Collider. The study is performed in final states including two same-sign leptons (electrons or muons), missing transverse momentum, and at least two jets with a large invariant mass and a large rapidity difference. Two independent fits are performed targeting the production of same-sign W bosons with at least one, or two longitudinally polarized W bosons. The observed (expected) significance of the production with at least one longitudinally polarized W boson is 3.3 (4.0) standard deviations. An observed (expected) 95% confidence level upper limit of 0.45 (0.70)聽fb is reported on the fiducial production cross section of two longitudinally polarized same-sign W bosons.

Radio emission from a nearby M dwarf binary

Monthly Notices of the Royal Astronomical Society 91探花 University Press 543:3 (2025) 1935-1944

Authors:

Kelvin Wandia, Michael A Garrett, Robert J Beswick, Jack F Radcliffe, Vishal Gajjar, David Williams-Baldwin, Chenoa Tremblay, Iain McDonald, Alex Andersson, Andrew Siemion

Abstract:

We present the detection of the binary system 2MASS J02132062+3648506 AB using the Karl G. Jansky Very Large Array archive data observed at 4鈥8 GHz. The system is a triple consisting of a tight binary () of two M dwarfs of spectral types M4.5 and M6.5 and a wide T3 brown dwarf companion (16.4 arcsec). The binary displays coronal and chromospheric activity as traced by previously measured X-ray flux and H emission. We detect the unresolved binary at a peak flux density of at a signal-to-noise ratio (SNR) of and determine a radio luminosity of . The radio emission is quiescent, polarized at a mean circular polarization fraction % and exhibits a spectral index . We probe the binary using the Enhanced Multi-Element Remotely Linked Interferometer Network (e-MERLIN) with an angular resolution of mas at 5 GHz and detect a component at a peak flux density of Jy at a SNR . We propose a gyrosynchrotron origin for the radio emission and estimate a magnetic field strength G, an emitting region of size times the radius of the M4.5 primary and a plasma number density . The brown dwarf companion is not detected. Additionally, we have analysed observations of 2MASS J04183483+213127, a chromospherically active L5 brown dwarf which is also not detected and can only place flux density upper limits at Jy and Jy for Stokes I and V, respectively.