Dab tsi qhov chaw sojntsuam tau pom sab nraum lub hnub ci

2024 Tus sau: Seth Attwood | [email protected]. Kawg hloov kho: 2023-12-16 16:06

Thaum lub Kaum Ib Hlis 2018, tom qab 41-xyoo voyage, Voyager 2 hla ciam teb dhau los uas lub hnub lub hwj chim xaus thiab nkag mus rau qhov chaw interstellar. Tab sis lub hom phiaj ntawm kev soj ntsuam me me tseem tsis tau ua tiav - nws tseem ua rau kev tshawb pom zoo heev.

Xyoo 2020, Voyager 2 tau pom ib yam dab tsi zoo kawg: qhov chaw ntom ntom nce nrog qhov deb ntawm lub hnub.

Cov ntsuas zoo sib xws tau xa mus rau lub ntiaj teb los ntawm Voyager 1, uas nkag mus rau qhov chaw nruab nrab hauv xyoo 2012. Cov ntaub ntawv qhia tau hais tias qhov nce ntawm qhov ntom tuaj yeem yog qhov tshwj xeeb ntawm lub hnub qub nruab nrab.

Lub hnub ci system muaj ob peb ciam teb, ib tug ntawm cov, hu ua lub heliopause, yog txiav txim los ntawm lub hnub ci cua, los yog es los ntawm nws tseem ceeb tsis muaj zog. Qhov chaw sab hauv lub heliopause yog lub heliosphere, thiab qhov chaw sab nraud yog qhov nruab nrab ntawm lub hnub qub. Tab sis lub heliosphere tsis yog puag ncig. Nws zoo nkaus li zoo li lub oval, nyob rau hauv uas lub hnub ci yog nyob rau ntawm ntug, thiab ib hom ntawm tus Tsov tus tw stretches qab nws.

Ob leeg Voyagers hla lub heliopause ntawm ntug kev, tab sis nyob rau hauv qhov sib txawv ntawm 67 degrees nyob rau hauv heliographic latitude thiab 43 degrees nyob rau hauv longitude.

Qhov chaw Interstellar feem ntau suav hais tias yog lub tshuab nqus tsev, tab sis qhov no tsis yog qhov tseeb. Qhov ntom ntawm cov teeb meem tsawg kawg nkaus, tab sis nws tseem muaj. Nyob rau hauv lub hnub ci system, lub hnub ci cua muaj qhov nruab nrab ntom ntawm protons thiab electrons los ntawm 3 mus rau 10 particles ib cubic centimeter, tab sis nws yog qis dua los ntawm lub hnub.

Qhov nruab nrab concentration ntawm electrons nyob rau hauv Milky Way lub interstellar qhov chaw yog kwv yees li 0.037 hais ib cubic centimeter. Thiab cov ntshav plasma nyob rau sab nraud heliosphere ncav cuag li 0.002 electrons ib cubic centimeter. Thaum Voyager probes hla lub heliopause, lawv cov cuab yeej tau sau cov electron ceev ntawm cov ntshav los ntawm cov ntshav oscillations.

Voyager 1 hla lub heliopause thaum Lub Yim Hli 25, 2012 ntawm qhov deb ntawm 121.6 astronomical units los ntawm lub ntiaj teb (qhov no yog 121.6 npaug ntawm qhov kev ncua deb ntawm lub ntiaj teb mus rau lub hnub - txog 18.1 billion km). Thaum nws thawj zaug ntsuas cov ntshav oscillations tom qab hla lub heliopause thaum Lub Kaum Hli 23, 2013 ntawm qhov deb ntawm 122.6 astronomical units (18.3 billion km), nws pom cov ntshav ceev ntawm 0.055 electrons ib cubic centimeter.

Tom qab ya mus rau lwm 20 astronomical units (2.9 billion kilometers), Voyager 1 tau tshaj tawm qhov ceev ntawm interstellar qhov chaw mus rau 0.13 electrons ib cubic centimeter.

Voyager 2 hla lub heliopause thaum lub Kaum Ib Hlis 5, 2018 ntawm qhov deb ntawm 119 astronomical units (17.8 billion kilometers. Thaum Lub Ib Hlis 30, 2019, nws ntsuas ntshav oscillations ntawm qhov deb ntawm 119.7 astronomical units (17.9 billion kilometers), pom tias qhov ntom ntom plasma. yog 0.039 electrons ib cubic centimeter.

Thaum Lub Rau Hli 2019, Voyager 2's Devices tau pom qhov nce ntxiv ntawm qhov ceev mus txog 12 electrons ib cubic centimeter ntawm qhov deb ntawm 124.2 AU (18.5 billion kilometers).

Dab tsi ua rau qhov nce qhov ntom ntawm qhov chaw? Ib txoj kev xav yog tias cov kab ntawm lub zog ntawm interstellar magnetic teb ua kom muaj zog nrog kev ncua deb ntawm heliopause. Qhov no tuaj yeem ua rau electromagnetic ion cyclotron instability. Voyager 2 tau kuaj pom qhov nce hauv qhov sib nqus tom qab hla lub heliopause.

Lwm txoj kev xav yog tias cov khoom nqa tawm los ntawm lub hnub qub cua yuav tsum qeeb hauv lub heliopause, tsim ib hom ntsaws, raws li pom los ntawm qhov tsis muaj zog ultraviolet ci pom los ntawm New Horizons sojntsuam xyoo 2018, tshwm sim los ntawm kev sib sau ntawm nruab nrab hydrogen hauv heliopause..