
{"id":2131,"date":"2020-11-20T14:18:16","date_gmt":"2020-11-20T13:18:16","guid":{"rendered":"https:\/\/astrostrona.pl\/?p=2131"},"modified":"2020-11-20T15:22:15","modified_gmt":"2020-11-20T14:22:15","slug":"frb-szybkie-blyski-radiowe-teraz-w-naszej-galaktyce","status":"publish","type":"post","link":"https:\/\/astrostrona.pl\/?p=2131","title":{"rendered":"FRB: szybkie b\u0142yski radiowe teraz w naszej Galaktyce!"},"content":{"rendered":"\n<p><strong>Kolejne dwa szybkie b\u0142yski radiowe zarejestrowa\u0142 mi\u0119dzynarodowy zesp\u00f3\u0142 naukowc\u00f3w. Ich \u017ar\u00f3d\u0142em jest magnetar, czyli gwiazda neutronowa o pot\u0119\u017cnym polu magnetycznym, po\u0142o\u017cna w naszej Galaktyce. W badaniach uczestniczy\u0142 radioteleskop z podtoru\u0144skich Piwnic.<\/strong><\/p>\n\n\n\n<p>Szybkie b\u0142yski radiowe, zwane po angielsku <strong>Fast Radio Bursts<\/strong> (FRB), to bardzo silne wybuchy energii rejestrowane na falach radiowych i trwaj\u0105ce u\u0142amki sekund. W tak kr\u00f3tkim czasie mo\u017ce by\u0107 wyzwolona energia <strong>nawet 100 miliony razy wi\u0119ksza ni\u017c moc promieniowania S\u0142o\u0144ca<\/strong>.<\/p>\n\n\n\n<p>Tego typu dwa b\u0142yski naukowcy z Europy zarejestrowali w maju. Ich \u017ar\u00f3d\u0142em okaza\u0142 si\u0119 <strong>magnetar<\/strong>, czyli specyficzny typ gwiazdy neutronowej, oznakowany jako SGR 1935+2154. Magnetary posiadaj\u0105 pola magnetyczne <strong>do 10000 razy wi\u0119ksze ni\u017c klasyczne gwiazdy neutronowe<\/strong>. SGR 1935+2154 po\u0142o\u017cony jest oko\u0142o 25000 lat \u015bwietlnych od Ziemi w gwiazdozbiorze Liska (Vulpecula).<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"600\" src=\"https:\/\/astrostrona.pl\/wp-content\/uploads\/2020\/11\/600px-Magnetar.jpg\" alt=\"Magnetar\" class=\"wp-image-2138\" srcset=\"https:\/\/astrostrona.pl\/wp-content\/uploads\/2020\/11\/600px-Magnetar.jpg 600w, https:\/\/astrostrona.pl\/wp-content\/uploads\/2020\/11\/600px-Magnetar-300x300.jpg 300w, https:\/\/astrostrona.pl\/wp-content\/uploads\/2020\/11\/600px-Magnetar-150x150.jpg 150w, https:\/\/astrostrona.pl\/wp-content\/uploads\/2020\/11\/600px-Magnetar-75x75.jpg 75w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><figcaption>Magnetar &#8211; wizualizacja przedstawiaj\u0105ca linie pola magnetycznego oraz ob\u0142oki plazmy otaczaj\u0105cej obiekt. <em>\u0179r\u00f3d\u0142o: Dr. Robert Mallozzi\/University of Alabama in Huntsville working at NASA\/Marshall Space Flight Center.<\/em><\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Bli\u017cej rozwi\u0105zania zagadki?<\/h2>\n\n\n\n<p>Jest to dla astronom\u00f3w dobra wiadomo\u015b\u0107, bo znajduje si\u0119 on w naszej Galaktyce, wi\u0119c relatywnie blisko. Dlatego \u0142atwiej jest bada\u0107 natur\u0119 tego tajemniczego zjawiska. Do tej pory podobne sygna\u0142y dociera\u0142y z bardziej odleg\u0142ych miejsc Wszech\u015bwiata, dlatego ich badanie by\u0142o trudniejsze.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>&#8222;<em>Skierowali\u015bmy w tamt\u0105 stron\u0119 nasze radioteleskopy, bo o pierwszym, kwietniowym b\u0142ysku od SGR 1935+2154 donios\u0142y inne zespo\u0142y badawcze<\/em>&#8221; &#8211; opowiada PAP dr <strong>Marcin Gawro\u0144ski <\/strong>z Instytutu Astronomii UMK w Toruniu, kt\u00f3ry jest zaanga\u017cowany w projekt. Liderem mi\u0119dzynarodowego zespo\u0142u jest <strong>Franz Kirsten<\/strong> z Onsala Space Observatory na szwedzkim Uniwersytecie Technicznym Chalmersa. O wynikach projektu badacze informuj\u0105 w presti\u017cowym &#8222;Nature Astronomy&#8221;.<\/p><\/blockquote>\n\n\n\n<p>Gawro\u0144ski podkre\u015bla, \u017ce od ponad dekady fenomen <strong>FRB jest jedn\u0105 z najwi\u0119kszych tajemnic wsp\u00f3\u0142czesnej astrofizyki.<\/strong><\/p>\n\n\n\n<p>Wed\u0142ug badaczy majowe b\u0142yski by\u0142y zdecydowanie s\u0142absze ni\u017c inne znane tego typu zjawiska, kt\u00f3rych \u017ar\u00f3d\u0142a znajduj\u0105 si\u0119 poza nasz\u0105 Galaktyk\u0105. By\u0142y te\u017c s\u0142absze ni\u017c kwietniowy wybuch radiowy na SGR 1935+2154.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>&#8222;<em>Tak naprawd\u0119 nie wiedzieli\u015bmy, czego si\u0119 spodziewa\u0107. Nie jest \u0142atwo zaobserwowa\u0107 zjawisko FRB za pomoc\u0105 klasycznych, pojedynczych radioteleskop\u00f3w. SGR 1935+2154 zacz\u0105\u0142 zachowywa\u0107 si\u0119 w zupe\u0142nie nowy spos\u00f3b i wszyscy mieli\u015bmy nadziej\u0119, \u017ce r\u00f3wnie\u017c i nas czym\u015b zaskoczy<\/em>&#8221; &#8211; powiedzia\u0142 cytowany w materia\u0142ach prasowych &#8222;Nature Astronomy&#8221; jeden z cz\u0142onk\u00f3w zespo\u0142u badawczego <strong>Mark Snelders<\/strong> z Uniwersytetu Amsterdamskiego.<\/p><\/blockquote>\n\n\n\n<p>Wed\u0142ug badaczy nowo odkryte b\u0142yski to przekonuj\u0105cy dow\u00f3d na to, \u017ce \u017ar\u00f3d\u0142em przynajmniej cz\u0119\u015bci zjawisk FRB s\u0105 magnetary, do kt\u00f3rych grupy nale\u017cy sam SGR 1935+2154. Tak samo jak \u017ar\u00f3d\u0142a znajduj\u0105ce si\u0119 w o wiele wi\u0119kszych, kosmologicznych odleg\u0142o\u015bciach, SGR 1935+2154 jest w stanie produkowa\u0107 w losowych przedzia\u0142ach czasowych kr\u00f3tkie b\u0142yski radiowe o du\u017cym rozrzucie, je\u015bli chodzi o emitowan\u0105 energi\u0119 &#8211; wskazuj\u0105.<\/p>\n\n\n\n<p>Badanie takiej aktywno\u015bci magnetar\u00f3w jest bardzo trudne, bo rozb\u0142yski s\u0105 losowe, nie da si\u0119 ich przewidzie\u0107. Samych magnetar\u00f3w w Drodze Mlecznej jest znanych obecnie zaledwie kilkana\u015bcie.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"516\" height=\"516\" src=\"https:\/\/astrostrona.pl\/wp-content\/uploads\/2020\/11\/Magnetar_SGR_190014.jpg\" alt=\"Magnetar SGR 1900+14\" class=\"wp-image-2139\" srcset=\"https:\/\/astrostrona.pl\/wp-content\/uploads\/2020\/11\/Magnetar_SGR_190014.jpg 516w, https:\/\/astrostrona.pl\/wp-content\/uploads\/2020\/11\/Magnetar_SGR_190014-300x300.jpg 300w, https:\/\/astrostrona.pl\/wp-content\/uploads\/2020\/11\/Magnetar_SGR_190014-150x150.jpg 150w, https:\/\/astrostrona.pl\/wp-content\/uploads\/2020\/11\/Magnetar_SGR_190014-75x75.jpg 75w\" sizes=\"(max-width: 516px) 100vw, 516px\" \/><figcaption>Magnetar SGR 1900+14. Obraz uzyskany w podczerwieni przez teleskop Spitzera przedstawia rozci\u0105gaj\u0105c\u0105 si\u0119 na szeroko\u015b\u0107 7 lat \u015bwietlnych pozosta\u0142o\u015b\u0107 po kolapsie masywnej gwiazdy, kt\u00f3ra utworzy\u0142a magnetar znajduj\u0105cy si\u0119 w centrum zdj\u0119cia. Sam obiekt nie jest widoczny w podczerwieni, zaobserwowano go w promieniach rentgenowskich. Magnetar znajduje si\u0119 w odleg\u0142o\u015bci 20 tys. lat \u015bwietlnych od Ziemi. <em>\u0179r\u00f3d\u0142o: NASA\/JPL-Caltech<\/em><\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Co jest przyczyn\u0105 rozb\u0142ysk\u00f3w?<\/h2>\n\n\n\n<p>Astrofizycy zaproponowali du\u017c\u0105 liczb\u0119 hipotez, kt\u00f3re mog\u0105 t\u0142umaczy\u0107 ich powstawanie, \u0142\u0105cznie z technosygnaturami cywilizacji pozaziemskich. W ocenie Gawro\u0144skiego ta koncepcja jest jednak ma\u0142o prawdopodobna. Raczej nale\u017cy spodziewa\u0107 si\u0119, \u017ce jest to efekt jakiego\u015b nierozpoznanego zjawiska naturalnego rozgrywaj\u0105cego si\u0119 w najbli\u017cszym otoczeniu magnetar\u00f3w.<\/p>\n\n\n\n<p>Dwa nowe b\u0142yski z 24 maja wskazuj\u0105 na pojawiaj\u0105ce si\u0119 zaburzenia w magnetosferze magnetara &#8211; bardzo blisko jego powierzchni.<\/p>\n\n\n\n<p>Obserwacje by\u0142y prowadzone przez 25-metrowy radioteleskop RT1 w Westerborku (Holandia), dwa teleskopy w Onsali (Szwecja) o \u015brednicy 20 i 25 metr\u00f3w, oraz 32-metrowy radioteleskop w Piwnicach pod Toruniem (Polska).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Wa\u017cne jest szcz\u0119\u015bcie&#8230;<\/h2>\n\n\n\n<p>Gawro\u0144ski ubolewa, \u017ce sygna\u0142y nie zosta\u0142y zarejestrowane przez polski radioteleskop, bo musia\u0142 by\u0107 szybciej wy\u0142\u0105czony w zwi\u0105zku z jego remontem. Szcz\u0119\u015bciarzami okazali si\u0119 holenderscy partnerzy projektu.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>&#8222;<em>Smaczku mo\u017ce doda\u0107 fakt, \u017ce uda\u0142o nam si\u0119 odebra\u0107 b\u0142yski od magnetara podczas ostatniego dnia zaplanowanych obserwacji. Pokazuje to, \u017ce w badaniach tego typu wa\u017cne jest szcz\u0119\u015bcie<\/em>&#8221; &#8211; dodaje.<\/p><\/blockquote>\n\n\n\n<p>Zesp\u00f3\u0142 radioteleskop\u00f3w, po jednym z Holandii i Polski, oraz dwa ze Szwecji, \u015bledzi\u0142y SGR 1935+2154 ka\u017cdej nocy przez ponad cztery tygodnie po odkryciu pierwszego, bardzo jasnego b\u0142ysku. Sumaryczny czas obserwacji wyni\u00f3s\u0142 ponad 522 godziny.<\/p>\n\n\n\n<p>Naukowcy z Torunia wraz z wsp\u00f3\u0142pracownikami kontynuuj\u0105 od po\u0142owy listopada obserwacje SGR 1935+2154 i innych znanych magnetar\u00f3w z naszej Galaktyki. Licz\u0105, \u017ce podobne zjawiska uda si\u0119 &#8222;us\u0142ysze\u0107&#8221; tak\u017ce od innych obiekt\u00f3w.<\/p>\n\n\n\n<p><em>\u0179r\u00f3d\u0142o: PAP &#8211; Nauka w Polsce, Szymon Zdzieb\u0142owski<\/em><\/p>\n\n\n\n<p>Je\u017celi zainteresowa\u0142 Was ten temat, wys\u0142uchajcie wyk\u0142adu cytowanego wy\u017cej dr Marcina Gawro\u0144skiego na temat FRB: <\/p>\n\n\n\n<iframe loading=\"lazy\" src=\"https:\/\/www.facebook.com\/plugins\/video.php?href=https%3A%2F%2Fwww.facebook.com%2FUraniaPA%2Fvideos%2F1159287494466295%2F&#038;show_text=0&#038;width=640\" width=\"630\" height=\"360\" style=\"border:none;overflow:hidden\" scrolling=\"no\" frameborder=\"0\" allowfullscreen=\"true\" allow=\"autoplay; clipboard-write; encrypted-media; picture-in-picture; web-share\" allowFullScreen=\"true\"><\/iframe>\n<div class=\"pvc_clear\"><\/div><p id=\"pvc_stats_2131\" class=\"pvc_stats total_only  \" data-element-id=\"2131\" style=\"\"><i class=\"pvc-stats-icon small\" aria-hidden=\"true\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" version=\"1.0\" viewBox=\"0 0 502 315\" preserveAspectRatio=\"xMidYMid meet\"><g transform=\"translate(0,332) scale(0.1,-0.1)\" fill=\"\" stroke=\"none\"><path d=\"M2394 3279 l-29 -30 -3 -207 c-2 -182 0 -211 15 -242 39 -76 157 -76 196 0 15 31 17 60 15 243 l-3 209 -33 29 c-26 23 -41 29 -80 29 -41 0 -53 -5 -78 -31z\"\/><path d=\"M3085 3251 c-45 -19 -58 -50 -96 -229 -47 -217 -49 -260 -13 -295 52 -53 146 -42 177 20 16 31 87 366 87 410 0 70 -86 122 -155 94z\"\/><path d=\"M1751 3234 c-13 -9 -29 -31 -37 -50 -12 -29 -10 -49 21 -204 19 -94 39 -189 45 -210 14 -50 54 -80 110 -80 34 0 48 6 76 34 21 21 34 44 34 59 0 14 -18 113 -40 219 -37 178 -43 195 -70 221 -36 32 -101 37 -139 11z\"\/><path d=\"M1163 3073 c-36 -7 -73 -59 -73 -102 0 -56 133 -378 171 -413 34 -32 83 -37 129 -13 70 36 67 87 -16 290 -86 209 -89 214 -129 231 -35 14 -42 15 -82 7z\"\/><path d=\"M3689 3066 c-15 -9 -33 -30 -42 -48 -48 -103 -147 -355 -147 -375 0 -98 131 -148 192 -74 13 15 57 108 97 206 80 196 84 226 37 273 -30 30 -99 39 -137 18z\"\/><path d=\"M583 2784 c-38 -19 -67 -74 -58 -113 9 -42 211 -354 242 -373 16 -10 45 -18 66 -18 51 0 107 52 107 100 0 39 -1 41 -124 234 -80 126 -108 162 -133 173 -41 17 -61 16 -100 -3z\"\/><path d=\"M4250 2784 c-14 -9 -74 -91 -133 -183 -95 -150 -107 -173 -107 -213 0 -55 33 -94 87 -104 67 -13 90 8 211 198 130 202 137 225 78 284 -27 27 -42 34 -72 34 -22 0 -50 -8 -64 -16z\"\/><path d=\"M2275 2693 c-553 -48 -1095 -270 -1585 -649 -135 -104 -459 -423 -483 -476 -23 -49 -22 -139 2 -186 73 -142 361 -457 571 -626 285 -228 642 -407 990 -497 242 -63 336 -73 660 -74 310 0 370 5 595 52 535 111 1045 392 1455 803 122 121 250 273 275 326 19 41 19 137 0 174 -41 79 -309 363 -465 492 -447 370 -946 591 -1479 653 -113 14 -422 18 -536 8z m395 -428 c171 -34 330 -124 456 -258 112 -119 167 -219 211 -378 27 -96 24 -300 -5 -401 -72 -255 -236 -447 -474 -557 -132 -62 -201 -76 -368 -76 -167 0 -236 14 -368 76 -213 98 -373 271 -451 485 -162 444 86 934 547 1084 153 49 292 57 452 25z m909 -232 c222 -123 408 -262 593 -441 76 -74 138 -139 138 -144 0 -16 -233 -242 -330 -319 -155 -123 -309 -223 -461 -299 l-81 -41 32 46 c18 26 49 83 70 128 143 306 141 649 -6 957 -25 52 -61 116 -79 142 l-34 47 45 -20 c26 -10 76 -36 113 -56z m-2057 25 c-40 -58 -105 -190 -130 -263 -110 -324 -59 -707 132 -981 25 -35 42 -64 37 -64 -19 0 -241 119 -326 174 -188 122 -406 314 -532 468 l-58 71 108 103 c185 178 428 349 672 473 66 33 121 60 123 61 2 0 -10 -19 -26 -42z\"\/><path d=\"M2375 1950 c-198 -44 -350 -190 -395 -379 -18 -76 -8 -221 19 -290 114 -284 457 -406 731 -260 98 52 188 154 231 260 27 69 37 214 19 290 -38 163 -166 304 -326 360 -67 23 -215 33 -279 19z\"\/><\/g><\/svg><\/i> <img loading=\"lazy\" decoding=\"async\" width=\"16\" height=\"16\" alt=\"Loading\" src=\"https:\/\/astrostrona.pl\/wp-content\/plugins\/page-views-count\/ajax-loader-2x.gif\" border=0 \/><\/p><div class=\"pvc_clear\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Kolejne dwa szybkie b\u0142yski radiowe zarejestrowa\u0142 mi\u0119dzynarodowy zesp\u00f3\u0142 naukowc\u00f3w. Ich \u017ar\u00f3d\u0142em jest magnetar, czyli gwiazda neutronowa o pot\u0119\u017cnym polu magnetycznym, po\u0142o\u017cna w naszej Galaktyce. 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Ich \u017ar\u00f3d\u0142em jest magnetar, czyli gwiazda neutronowa o pot\u0119\u017cnym polu magnetycznym, po\u0142o\u017cna w naszej Galaktyce. 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