Krab (otu)

Nshịkọ bụ ọkọlọtọ astrophotometric maka ike nke isi nke X-ray Astrophysical .  [1] [2] [3] [4] A kọwapụtara otu nshịkọ dị ka ike nke Crab Nebula na ike foton X-ray ngwaọrụ.

Crab Nebula, na nshịkọ Pulsar dị n'ime ya, bụ isi iyi X-ray dị egwu.  A na-eji ya dị ka kandụl ọkọlọtọ na usoro nhazi nke ngwa X-ray na mbara igwe.  Otú ọ dị, n'ihi ihe ike nke Crab Nebula na ike X-ray dị iche iche, ntụgharị nke Crab gaa na okporo ụzọ ọzọ na-adabere n'ogo ike X-ray nzọụkwụ.

. Na ike foton sitere na 2 ruo 10 keV, 1 Crab nhata 2.4 · 10 -8 erg cm -2 s -1 = 15 keV cm -2 s -1 = 2.4 · 10 -11 W m -2 .  Maka ike ụmụaka ~ 30 keV, Crab Nebula na-aghọ ihe na-adịghị mma maka nhazi nhazi, n'ihi na akara ike iji otu ụdị na-azụ ya na mgbawa ya.

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