GN-z11
Salah satu galaksi tertua dan terjauh yang diketahui saat ini
GN-z11 adalah galaksi tertua dan terjauh di alam semesta teramati yang di ditemukan oleh Survei Utara GOODS.di konstelasi Ursa Major saat meneliti foto-foto dari Teleskop Hubble. GN-z11 memiliki pergeseran merah spektroskopi sebesar z = 11.09, yang sesuai dengan jarak comoving sekitar 32 miliar tahun cahaya dari Bumi. GN-z11 diamati sebagaimana kondisinya 13,4 miliar tahun yang lalu, hanya 400 juta tahun setelah Dentuman Besar. Karena itu jaraknya secara luas dilaporkan sebagai 13,4 miliar tahun cahaya.[4][n 1][5][6][7]
| GN-z11 | |
|---|---|
 Citra GN-z11 yang ditemukan oleh Survei GOODS Utara | |
| Data pengamatan (J2000[1] epos) | |
| Rasi bintang | Ursa Major[1] |
| Asensio rekta | 12j 36m 25.46d[1] |
| Deklinasi | +62° 14′ 31.4″[1] |
| Pergeseran merah | 11.09 |
| Kecepatan radial helio | 295.050 ± 119.917 km/s (183.336 ± 74.513 mi/s)[2] |
| Jarak |
|
| Ciri-ciri | |
| Jenis | Tidak beraturan |
| Massa | ~1×109[3] M☉ |
| Ukuran | 4.000 ± 2.000 ly (1.200 ± 610 pc)[3] |
| Penamaan lain | |
| GN-z10-1,[3] GNS-JD2[2] | |
Catatan
- ^ At first glance, the distance of 32 billion light years might seem impossibly far away in a Universe that is only 13.8 billion years old, where a light year is the distance light travels in a year, and where nothing can travel faster than the speed of light.
Referensi
- ^ a b c d "Hubble Team Breaks Cosmic Distance Record - Fast Facts". HubbleSite. March 3, 2016. STScI-2016-07. Diarsipkan dari versi asli tanggal July 6, 2016. Diakses tanggal March 4, 2016.
- ^ a b "[BIG2010] GNS-JD2". SIMBAD. Centre de données astronomiques de Strasbourg. Diakses tanggal February 13, 2017.
- ^ a b c Kesalahan pengutipan: Tag
<ref>tidak sah; tidak ditemukan teks untuk ref bernamaAstro draft - ^ "Astronomers Spot Most Distant Galaxy—At Least For Now". Phenomena. Diakses tanggal March 4, 2016.
Yep, it took 13.4 billion years for light from the galaxy to zoom through the universe and collide with the Hubble Space Telescope. But that doesn’t mean the galaxy is 13.4 billion light-years away. The universe has been expanding in the meantime, meaning GN-z11 is actually much, much farther from Earth than that.
“Right now, we expect this galaxy to be about 32 billion light-years away from us in distance,” says study coauthor Pascal Oesch of Yale University. - ^ Amos, Jonathan (March 3, 2016). "Hubble sets new cosmic distance record". BBC News. Diakses tanggal March 3, 2016.
- ^ Oesch, P. A.; Brammer, G.; van Dokkum, P.; et al. (March 1, 2016). "A Remarkably Luminous Galaxy at z=11.1 Measured with Hubble Space Telescope Grism Spectroscopy". arXiv:1603.00461
.
- ^ "Astronomers Spot Record Distant Galaxy From Early Cosmos", The New York Times (by the Associated Press), March 3, 2106; "GN-z11: Astronomers push Hubble Space Telescope to limits to observe most remote galaxy ever seen", Australian Broadcasting Corporation, March 4, 2016.
