# Asif n igenwan

| Asif igenwan |
| --- |
| amazellaw agriwel urgil d tafekka tagenwant |
|  |
| Isefka |
| Amur seg | tadu-grawt n wasif igenwan d Tagrawt tadigant |
| Angal n tjirt |
aucune valeur |
| Yettwazraw s | tasnetrit tamazellawant |
| Itezzi ɣef | Sagittarius A\* (fr)  |
| Tamuṛfulujt n umazellaw |
SBbc |

**Asif n igenwan** (s tmaheɣt: *ⵎⵂⵍⵡ amahǝllǝw*, s tcelḥit: *aɣaras n walim*) d amazellaw agriwel iteṭṭafar tfukt d tegnit d yimtiwgen niden n unagraw anafuk. Amazellaw-a yegber seg imelyaṛen n yitran (gar n 200 ɣer 400 n imelyaṛen n yitran), akken i ttenfufuden deg-s isigniwen d icafcalen, d imeqqranen s waṭas yakk d igedṛuṛen d igazen deg yal ijifeṛ seg ijufaṛ-is. Deg wuḍan imsullsen yesrawen (iṣfan), yettbin-d wasif n igenwan am akken d tadla n walim hrawen seg tafat n yitran-is, akken i d-ttmagen inkaren deg tadla-nni s usrag (s sebba) n tilin n isigniwen n ugedṛur d igazen iteffren tafat i d-ittaken seg yitran yellan deffir-nsen.

Talɣa n wasif n tegnawin d aglayan, Akdu-ines yettawaṭ seg 100.000 ɣer 180.000 n yifawatayen, ma d tuzert-is s wazal n 1000 n ifawatayen. S wakka ad tili d tagra tusdidt s waṭas. Tagnit tezga-d zdat n yiri n umazellaw-a anda itezzi unagraw anafuk ɣef wammas n umazellaw. Dɣa tafukt taggug s wazal n 27,000 n ifawatayen ɣef wammas n umazellaw.

Ma iwula kra n wemdan ɣer igenni deg yiḍ ad iẓer amur seg umazellaw n wasif n igenwan amzun d tadla n yitran, anda imezdaɣ n wezgen agafan n tiṭṭ n tfukt ẓerrent-id ama deg unebdu neɣ deg umwan neɣ deg tegrest. Ixef n aseflalay d tmeẓriwt tacraraqt yakk i umazellaw-a yettili-d deg taggara n unebdu d tazwara n umwan acku deg wakuden-a n useggas inezzeg (wasif n igenwan) seg tezdemt n tmesɣimt (*Cassiopeia*) alamma d sifus (*Cepheus*) deg ugafa seg wezgen asemran n igenni yakk seg tegrawt n yitran yettwassnen s ukerdis n uwilen, sin akin ad yerdeb seg yigli ɣer tgenzi yakk d tɣirdemt. Isigniwen n tallunt teffren gar n ukerdis n uwilen d tgenzi yiwet n tjumma talemmast hrawen seg uɣaras n walim ayen i d-ittaǧǧan ittbin-d yegzen ɣer sin n wamuren, ma deg zdat n tgenzi d tɣirdemt yettili uɣaras n walim d aseflalay s waṭas acku d tanila-nni i d-immalen ammas n umazellaw.

Asif n igenwan iga d aseflalay deg kra n tamiwin ugar n tamiwin niden. Anda tama i d-izzin i waẓiẓ wa iggadan (*Cygnus*) yettfejjij s waṭas, maca amur yehrawen s waṭas yerna iseflellayen s waṭas yezga-d deg unẓul ɣef yimeẓli yerna yezmer wemdan ad tiẓer deg tallunt tagafant deg tmeddiyin n unebdu maca timeẓriwt tettili tefrar ugar deg tamiwin i d-izgan ɣer unẓul n usebges.

## Anulfu n wasif n igenwan

Imesnullanen settgen (ttaken lewhi) d akken asif n igenwan yennelfa-d send n wazal n 12-14 n imelyaṛen n iseggasen, akken ittɣilen d akken amazellaw-a d win meẓẓiyen deg waddar s wassaɣ ɣer imazellawen niden yellan deg usedday, Aguccel n waddar-is yella-d s usemres n tesnemdalɣisant.

Deg useggas n 2007 yettwasteg waddar n yiwen n yitri isem-is NGC 3199 s wazal n 13,7 n imelyaṛen n iseggasen, itri ayi izga-d deg wezɣar (beṛṛa) n umazellaw, yaggug ɣef tegnit s 13.2 n imelyaṛen n iseggasen, akken i yettumeggez d tafekka tagennawt tamzikant (taqburt) imur-nni anda i d-issers tilisa tiddayin i waddar n wasif n igenwan. yella-d uselken seg ustag-a s waktaylal n **UV-Visual Echelle** n umseddas ameqqran.
Astag n waddar n yitran i d-izgan deg tagra tamazallawt tusdidt yezmer ad yili s tarrayt yettemcabin i HE 1523-0901. Igemmuden n wakaten llan deg tlisa n 8.8 ± 1.7 n imelyaṛen n iseggasen yezrin, anecta yessumur-d d akken kra n wenkar addar-is 5 n imelyaṛen n iseggasen yella dinna gar n tallit n yisni d tagra tusdidt.

## isegra n uɣaras n walim

iɣallen n umazellaw d wadeg n tfukt, Tinliwin yemgaraden yeddan seg wadeg n tfukt mmalent-d tigrawin titrawin. Akken i d-temmal talɣa-nni hiwet n tama ur ttwaẓran ara deg-s yitran s usrag n tneẓẓi n igedṛuren deg wammas n umazellaw.
Talɣa n yiɣil n umanar s unect n umagrad ussnan n kra n imusnawen yettwafsaren deg: "Spiral Structure in the Outer Galactic Disk. I. The Third Galactic Quadrant". *The Astrophysical Journal*. **672** (2): 930–939. 2008. doi:10.1086/524003. Text "author" ignored (help); Unknown parameter `|azemz n ufaylu=` ignored (help); Unknown parameter `|akala n ufaylu=` ignored (help); Unknown parameter `|month=` ignored (help)
Tamudemt n umazellaw agriwel degs tagra, d nnig-s yakk s ddaw-as yella yisni igebren seg timsegrawin titrawin yettwazuzzren.
Aɣaras n walim yettumeggez d yisen seg imazellawen igriwlen imeqqranen. Ttezzi ɣef yiman-is yiwet n tuzzya yal 250 n imelyan n iseggasen, akken i tezzin degs yitran-is s urured yemgaraden anda itran yellan deg wammas-is i tezzin s urured d tazzla wala itran illan deg ijufaṛ-is akken daɣen i yella wemgarad deg rdusi n teldayt seg wadeg ɣer wayeṭ deg umazellaw s usrag n tmerniwt n tneẓẓi n yitran deg kra n tamiwin, anda ixeddmen isemda-nni deg tguri n yiɣallen igriwlen i umazellaw. Udus anafuk yezga-d deg yiwen seg yiɣalen-nni yettusemman iɣil n umanar i d-izgan deg wazal n sin n yikṛaden (⅔) n uzen-kdu n umazellaw. Akken iy gber umazellaw n uɣaras n walim seg waṭas n yiɣallen igriwlen niden i d-issentayen seg umazellaw sin akin ad negzen ɣer uzɣar (beṛṛa). Gar n yiɣallen yella yiɣil n wemẓiw (*Perseue arm*) igan d iɣil amaddas fellaɣ deg tama n ijifeṛ n umazellaw, yakk d Iɣil n imeẓli (*Sagittarius arm*) yudsen fellaɣ seg tama n wammas n umazellaw. Aɣaras n walim yegber daɣen seg waṭas n yiɣallen niden i d-izgan deg tagra n umazellaw, dɣa ttwasemman s yirem n iɣallen acku yal yiwen deg-sen yettak taɣara s tezdemt yettfeǧǧijen s waṭas deg-s. Amedya, iɣil n wemẓiw yettak taɣara s tezdemt n wemẓiw, ma d iɣil n imeẓli yettak taɣara s tezdemt n imeẓli, akken daɣen i yella yiɣil n umanar igrbren tazdemt n umanar deg wanda yella yiwen seg yisigniwen yettwassnen yakk, isem-is asignew n umanar.

'**Tamuski n umazellaw tebṭa ɣef 3 n yismilen igejdanen**:

* **Aweggir amazallaw**: tga d tuffet azun-mezzay yettak-d tafat, yettili deg wammas n umazellaw. Akaten n mraw n iseggasen-a yezrin sseknen-d d tilin n wemruj aberkan d acafcal deg wammas n umazellaw, takura-ines tla (tesɛa) azal n sin n imelyan n tkura tanafukt. Tehri-ines trennu s tmerniwt n waddar n umazellaw akken yella deg uweggir-a amsegraw meqqren s waṭas n yitran d igedṛuren inamdalen. Timeẓriwt n uweggir yuffen n umazellaw d win ifraren deg yiṭ acku tla asefliley ussis ɣas akken timeẓriwt n tfawtin-is tigensawin temray (tewɛer) s usrag tuget n igedṛuren iteffren tafat.
* **Iɣallen**: d ayen i d-itezzin i yiweggiren imazallawen igriwlen, gan d icafcalen, tezzin ɣef wammas n umazellaw. Am iɣil n umanar yaggugen s wazal n 26,000 n yifawatayen seg wammas n umazellaw. Imusnawen ssetgen-d d akken amdan n yitran yellan deg yiɣil-a yessawaṭ ɣer 200,000 n yitran, gar-asen [[tafukt]. Akken i d-ssetgen akdu n umazellaw s wazal n 110,000 n ifawatayen, dɣa tafukt tettili deg wuggug n 30,000 n ifawatayen ɣef wammas n umazellaw deg yiɣil n umanar. Teɣzi n yiɣil n umanar n umanar tettawaṭ ɣer 6,500 n ifawatayen ma d tuzert-is azal n 1000 n ifawatayen
* **Izɣuɣ**: d tamrest tamezzayt i d-izzin ɣef ugaraw n tegra tamazallawt alamma d istumen yaggugen, Akdu-ines yettawaṭ alamma d 150,000 n ifawatayen, tegber seg igazen yemgaraden d isignewen inamdalen akken i tegber seg timsegrawin titrawin yettwazuzren deg yal adeg ama s ddaw neɣ sufell n tegra. Timsegrawin-nni tezzint ɣef wammas n umazellaw s usrag n tilin wemruj aberkan deg wammas n umazellaw

### Talɣa tamatut

Tugna n umazellaw n uɣaras n walim s izenzaren iderzeggaɣen i d-ittwaṭṭfen s tanawt COBE
Alegdis azenzaɣ n uɣaris n walim
Aɣaris n walim akken i d-ten-ttwali deg yiṭ.
Tazrawt n tmuski n uɣaras n walim d tin imrayen (iweɛṛen) s usrag n igedṛuren iteffren aṭas seg tafat, s tenmgalt n uẓabaẓ n tezrawt n talɣiwin d tsengaman n imazellawen niden yaggugen fellaɣ maca nẓerr-iten-tt seg beṛṛa, Yerna anecta yullel (iɛawn) imusnawen s waṭas deg tezrawt n izenzaren i d-ikkan seg umazellaw-nneɣ deg tɣult n uzenzar aderzeggaɣ s igensaten yakk s tmuski n isanayen deg tegnit i wakken ad anin tayyugin tiṛadyawin i d-itekken deg-s.

Akin-a, yettumeggez d akken amazellaw n uɣaras n walim ila (isɛa) wuẓ neɣ semmus (4 neɣ 5) n iɣallen anda i trennu deg-sen tneẓẓi n yitran d igedṛuren, maca tura neẓra yakk d akken (tla tesɛa) aweggir d abeṛan mači d amezzay.. Yerna tegber seg 100 alamma d 300 n imelyaṛen n yitran d waṭas n ugedṛuṛ anamdal i d-ikeffun i wakken ad nnulfun s yis seg 600 alamma d umelyaṛ n yitran imaynuten. Ma d tasmekta n tenga deg umazellaw-a tettwasteg s wazal n 3,6 × 1041 kg, ma d akdy n tegra-ines azal n 100.000 n ifawatayen

Yella umazellaw n andṛumida i meqqren s wassaɣ ɣer umazellaw n wasif n igenwan anda akdu-ines yettawaṭ ɣer 150.000 n ifawatayen. Akken ig yella deg tegrawt-nneɣ tadigant ugmam wis 3 deg temɣer igan d amazellaw n ukerdis neɣ Messier 33 s unect n tejrit n Musier. Akdu-ines ila azal n 50.000 n ifawatayen neɣ ahat tazurt n umazellaw n wasif n igenwan yugar 3 n tikkal uṭṭun i d-ittunefken sɣur umusnaw n Ustṛalya **Brian Gaensler** d trebbut-is (tarbaɛt-is) i d-ifesren yiwet n tegmi deg usentel-a aseggas n 2008.

Ambiwel n ugaz zdat n wammas n umazellaw d usegder n yitran sskanayen-d d akken ammas-nni ur yelli ara d amezzay maca iga d abeṛday, d amaɣɣad. Abeṛdi ayi alemmas iggar-d tiɣmert azal-is 45° yakk d uzerrig yessawaṭen seg tfukt ɣer wammas n umazellaw.

Annay n umsaddas amalun n Spitzer ittakten tafat deg tɣult n uzenzar aderzeggaɣ d akken teɣzi n uberdi-nni tettawaṭ alamma d 27.000 n ifawatayen

S ugani ɣef tmusni-nneɣ d akken tazzla n tuzzya n tfukt tettawaṭ ɣer 276 km/s, imalla udus anafuk ɣef yibdi alemmas n umazellaw d wuggug n tfukt ɣef wammas ittaǧǧa ad yili usnis n yisudaf n Kepler i wsiden n tesmekta n tenga deg wamur agensaw n umazellaw. dɣa takura n tenga tummidt deg umazellaw n wasif n igenwan tga gar n 1,0 - 1,9 n imelyaṛen n tkurawin tinafukin., ma d takura n umazellaw n andṛumida tga azal n 1.2 n imelyaṛen n tkurawin tinafukin.

### Izɣuɣ

Itezzi-d yiwen n izɣuɣ amezzay ɣef tegra n umazellaw, akdu n yizɣuɣ-a tettawaṭ ɣer 165.000 n ifawatayen, ittaṭṭaf-it yiwen n welmes n ugaz. Akken i llant deg-s (zdat n iguza itrawen) aṭas n yitran imziken (iqdimen) yerna d imazgayen, gar-asen wid yeṭṭafaren asesmel n **RR-Lyrae** d ugaz adersan n tneẓẓi akken illan daɣen yitran d izegzawen i d-innulfan d imaynuten, tikurawin-nsen meqqer-it yerna lan (sɛan) tafasa tussist. S tmerniwt ɣer wannecta tettwasteg tenga tamallast i d-ikeffun i wakken ad ttger azal n 1000 n imelyaṛen n tkurawin tinafukin, maca imusnawen ar tura ur ẓrin ara d acu i d tanga tamallast acku mazal ṭṭafarwn isemda-ines war ma ad afen akat-is neɣ ad ttwalin, s wakka ad yili yizɣuɣ d ilem deg ugedṛur maca igber kan seg kra n iguza itrawen n yitran imezgiyen yeṭṭafaren **asesmel atraw II** ilan tamaɣuzt drusen

### Tagra (aḍebsi)

Amur ameqran n yitran ttumeggzen d akken-iten msegrawen (nnejmaɛen) deg tagra n umazellaw yerna asegder-is amzun d alugan. Tagra tegber s talɣa tagejdant seg yitran yeṭṭafaren asesmel 2 ilan afimidi meqqren n tmaɣuzt (imɣuzen iẓẓayen ɣef uhidṛujin d uhilium)

#### Iɣallen igriwlen

Amur deg Tegra ssiliɣen-t-id yiɣallen igriwlen yellan deg wudus anafuk. Tiɣalltin-a gebrent seg isigniwen meqqren d temsegrawin n uhidṛjin d tamiwin n tamiwin n H II anda i d-ttnulfun yitran d imaynuten. Ɣef wanecta illan deg yiɣallen itrawen ilulen.

Deg waddar n yitri ad yettembiwel seg wadeg anda i d-ilul w ad ttwasedger deg tagra. Maca itran icafcalen ilan takura meqqren (ugar n tkura n tfukt seg 10 ɣer 100 n tikkal) ur sen-d-ikeffu ara wakud i wembiwel deg tagra acku ttfakkan deg wadeg anda i d-lulen. Seg yitran-nni icafcalen deg tkura llan isesmilen **O** d **B** d ucafcal azeggaɣ d yitran imergaguyen, Dɣa addar n yal yiwen deg-sen ur yugar ara 100 n iseggase, itran-a ssiliɣen-d azal n 1% seg yitran n umazellaw ma d amur ameqqran deg yitran n umazellaw n wasif n igenwan gan d itran imziken imezgiyen anda yal itri ila takura yegdan agla n tfukt neɣ s ddaw-as.

Deg yunyu 2008, yiwet n tegrawt n imusnawen seg tseddawit n Wisconsin–Madison tefser-d yiwet n tegmi ɣef westag-nsen i wannayen i d-gran deg tɣult n uzenzar aderzeggaɣ s umsaddas amalun n Spitzer, tegmi ayi tesskanay-d d akken amazellaw n wasif n igenwan ila sin n yiɣallen kan. Yiwen d iɣil n imeẓli wis sin d iɣil n tseddakamt.

Ismawen n iɣallen| Isem | Tikwal isem-is | Deg tesnallunt |
| --- | --- | --- |
| Iɣil n uzadur | Tindert tis 3 | *Ulac*  |
| Iɣil n waylanca | Iɣil n Sagittarius | −II |
| Iɣil n imeẓli | Iɣil n imeẓli-zadur | −I |
| Iɣil n umanar | Iɣil adigan | 0 |
| Iɣil n wemẓiw | *Ulac* | +I |
| iɣil n waẓiẓ wa iggadan | Iɣil uffiɣ | +II |

Asif n igenwan deg tnila n yiɣil n wemẓiw, ɣer tama tayeffust yella usignew n tseddakamt yettfeǧǧijen d tama n uhidṛujin II
«*D acu-ten isemda isengamen i d-igellun s unulfu n yiɣallen deg umazellaw*» asteqsi ayi d taluft ur nli (ur nesɛi) tiririt ibanen, d acu kan yettwassen d akken itran d iɣallen ur bedden ara maca ttnwiwlen (ttḥerriken) deg temsegrawin i d-izzin i wammas n umazellaw. Kra n imusnawen ttarmen (tteɛṛaden) ad ssegzun anulfu n iɣallen s teẓri n tayyugin n tneẓẓi i d-igellun s tmerniwt n tneẓẓi n yitran deg yiɣallen, s wakka ad mmagen yitran d imaynuten

#### Itran n tegra

## Tagrawt tadigant

## Ẓeṛ daɣen

## Immiren