Astronomy Hypertext_ Structure of the Solar Corona

Astronomy Hypertext_ Structure of the Solar Corona -...

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Unformatted text preview: 1/15/12 Astronomy Hypertext: Structure of the Solar Corona As tronom H perte t Structure of the Solar Corona Lat est Modif icat ion: Jul 24, 2002 Stud ing the Corona The co ona i ha egi f he a a he e i g ab e he ch he e. A ee i h g a h a e d i g a a ec i e, i i he a ge ha f hi e, g i g ga e e di g a fe a adii ( i i f i e e ) be d he da i b f he M . A i e he a ec i e i i g e , ecia de ig ed ef ac i g e e c e , ca ed co onag aph , ha b c igh f he h he e a e ed b e e he c a. C a ed i h he a h fa ci ei a ce acc a ed i a e i e die e he a 20 ea , ec i e die ha e ie ded e ha a fe h f b e a i (a ec i e e d a ge ha a fe i e ). E e c ag a hic die , hich ha e g ea i c ea ed b e i g i e, ca a ch he i e c e age a d e i f a e ie b e a i f ab e he a he e. I Feb a f 1980, he a chi g f he Solar Ma imum Mission acec af , e f he hi ica ed a d c e a e ie e e b i , ided he i ee a ch he S d i g i e i d f a i face ac i i . H e e , i N e be f ha ea , Solar Ma i a i de- c e, ha he c af c d ge i i eigh i e a i ee ig i f he a face. The i A i f 1984, he c e f he Space Shut t le Challenger e e ab e e e Solar Ma i he ca g ba f Challenger f e ai (cha e e i g). Thi fi cce f e ai f a a e i e i bi e a e e a f ace b e a ie , i ha i he f e he i be e ai ed e iced i bi e e e ed he g df difica i . P e a e ded, Solar Ma a e a i he 1990 a a c e e a c c e f 11 ea . The Coronal Spe ctrum A i a e 30 e i i a d a h d ed f e i igi a e i high e ci ed i 15 e ec ha e bee i e ea e f ah deg ee f i i a i .) i e ha e bee ide i ie ae f fa i ia e e e ed i he c a' d ed f h a d ified i he i ib e a f he c a ec , i he a i e a d X- a ec . The , ch a i , f hich e e a a a a e e e h ,e ga e . (I a e e e a i i deg ee ai ch a F ii ee e e a e e g h he e i a ide ec a i d i he Ea h' a he e ha e i adi adia i . The S , he ie a d di bed, a e i he a (b ac b d ) adia i , hich i cha ac e i ic f a i i - deg ee c a. Whe he S i di bed, a he a f a e a e cc i g, he a adi e i i i added he he a c e , a d i ca be i e i e e. physics.gmu.edu/ jevans/astr103/CourseNotes/sun_atmosphereCorona.html 1/3 1/15/12 Astronomy Hypertext: Structure of the Solar Corona Coronal S r c re The e a e e e a i e f e ide ce, be ide he c a ec , ha c fi a iei e e a e h gh he ch he e i he c a. Si ce hea f f high e e a e egi , he c ea e e g be ed b e echa i f he e ea e h he e he high- e e a e c a. F a be f ea a e h gh ha he c a' high e e a e e ed f e e g ca ied i he c ab echa ica a e a i g i he b e h d ge c ec i e be he h he e. A e ide ce g e ha he ag e ic fie d f he h he e a d ch he e e e high ca i ed a d e i e e, i ee ed ha d ig e he ibi i ha he e ag e ic fie d e e di g i he c a e e a f he c al hea i g ce . Whe X- a ic e h ed ha he c a a di ided i ac i e egi a d h e egi i a i beca e f he c e f hei ag e ic fie d , i beca e eadi a a e ha , if a , f he hea i g i e ag e ic fie d . The hea i g i d ced b he di ec di i a i f he e e g ed i ag e ic fie d i he a e e g i he c a ga . The ea f he ch he e, h e e , a e i h gh be hea ed b echa ica a e . Ec i e ic e f he c a ide e ide ce f he i a ce f ag e ic fie d i c ig he c a. I hi e- igh h g a h e ca ee ha he c a i i eg a a d c ed. Bea if , g ea e e e d a d i he S ' e a ia egi . Nea ai he c a i ea ci c a , i h ea e adia i g i a di ec i . Nea ii , he c a e e d fa he i he e a ia egi a d e i a e a he ab , ih h , hi e c ig f a a ea . Beca e c a ga e a e a a a e , e fe a e i g h gh e e a c ea ce i ec i e ic e , hich b he de ai . Thi i h di ec h g a h i X- a a d e e e a i e a e e g h , he e e d fc a c e ,ae a ab e he d f he c a. T h g a h he c a di ec , e b e e i he 10 900 A (X- a e e e a i e ) a e e g h egi , he e adia i f he ch h e c a e he he h - a e e g h adia i f he h he e. B X- a a i e ic e be a e f ace beca e he Ea h' a he e ab b he e h a e e g h . I Xa a d a i e ic e he c a a ea high i h ge e a d ge e a a e ica , a d i a ie e i e b h h a d g i e ca e . The e a e h ee diffe e ef c a egi ha c ec i e cha ac e i e he e i e a c a: C a h e a dc a ac i e egi a e f he , a d he a e ea ab e defi ed i e f b e a i a cha ac e i ic ; he hi d i he c a ie egi , hich a e e defi ed. C al h l e a e egi f igh e e e a e a d ig ifica e de i ie , i h ag e ic fie d f ab 10 ga h eie e i i e a ea ace. Ra a d a e e ed f he a a f he S . C a h e aea h gh be he ce f f he ba ic a ic e i he a i d. C al ac i e egi , h e e , a e e e e diffe e f c a h e . The c i f c e , he a e e ha h e a d ch de e egi f he c a, a d hei ag e ic fie d f ab 100 ga ha i g fie d i e ha bac i he S i ead f e e di g a d a i he ca e f c ah e. Be ee he e e e e a e he i - defi ed c al i e egi , hich a ea be physics.gmu.edu/ jevans/astr103/CourseNotes/sun_atmosphereCorona.html 2/3 1/15/12 Astronomy Hypertext: Structure of the Solar Corona something in between. There are also man small, bright points visible in X- ra pictures. Cop right 1995 J. C. Ev ans Ph sics & Ast ronom Depart ment , George Mason Univ ersit Maint ained b J. C. Ev ans; j ev ans@gmu.edu physics.gmu.edu/ jevans/astr103/CourseNotes/sun_atmosphereCorona.html 3/3 ...
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This note was uploaded on 01/16/2012 for the course ASTR 103 taught by Professor Staff during the Spring '08 term at George Mason.

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