Tenaga Misteri Dalam Cahaya Kosmik

Ok, mungkin ada yang pernah terbaca tulisan aku mengenai cahaya lama dulu, pada tahun 2009. Kalau belum baca, atau dah lupa, ini link dia: Kenapa Infrared Banyak di Waktu Pagi?


Cahaya itu tenaga, itu semua orang tahu. Dan setiap jalur cahaya menyimpan tenaga yang berbeza, sebab itu lah kita melihat dunia dalam pelbagai warna :)
Dan cahaya yang kita mampu lihat itu cuma sebahagian kecil dari cahaya yang wujud di alam ini. Banyak cahaya yang kita tidak mampu lihat, dan saintis-saintis memberikan nama bagi setiap jalur cahaya ini.

Saiz jalur cahaya tampak dalam spektrum cahaya. Skala dalam logaritma, bukannya linear

Jadi kat sini aku nak share satu artikel yang sangat menarik, iaitu mengenai cahaya kosmik dengan tenaga yang sangat tinggi. Misterinya? Dari mana ia datang?

Preview dulu:

"According to a leading model, we would have expected to see 8.4 events corresponding to GRB production of neutrinos in the IceCube data used for this search," says Spencer Klein of the U.S. Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab), who is a long-time member of the IceCube Collaboration. "We didn't see any, which indicates that GRBs are not the source of ultra-high-energy cosmic rays."

...

Klein, the deputy director of Berkeley Lab's Nuclear Science Division (NSD, explains that in active galactic nuclei (AGNs) "the black holes suck in matter and eject enormous particle jets, perpendicular to the galactic disk, which could act as strong linear accelerators." Of gamma-ray bursts he says, "Some GRBs are thought to be collapses of supermassive stars -- hypernova -- while others are thought to be collisions of black holes with other black holes or neutron stars. Both types produce brief but intense blasts of radiation."

The massive fireballs move away from the explosion at nearly the speed of light, releasing most of their energy as gamma rays. The fireballs that give rise to this radiation might also accelerate particles to very high energies through a jet mechanism similar to that in AGNs, although compressed into a much smaller volume.

 Ok, kalau preview tu membatkan korang rasa berminat nak terus baca, ini link dia:
Where Do the Highest-Energy Cosmic Rays Come From?


Kalau tak berminat, tak perlu bukak link tu... Sebab dunia kuantum fizik ni memang 'gila' sikit bagi yang tak berminat...

Posted by Posted by Ariff Abdullah , on at 12:31 • Labels: geek, L, science