Dark GRBs linked to dust clouds
Posted: Tue, Jun 9, 2009, 8:22 AM ET (1222 GMT)
A class of gamma-ray bursts (GRBs) without a visible afterglow have been linked to galaxies with previously undetected dust clouds, astronomers announced Monday. "Dark" GRBs are so named because they have no detectable afterglow as visible or infrared wavelengths. Astronomers originally thought these GRBs were so distant that the light had been redshifted beyond detection. However, astronomers studied 14 such bursts and found that almost every one of them was associated with a galaxy that was visible in optical telescopes. Astronomers now believe the optical afterglow of these GRBs was absorbed by clouds of dust, perhaps associated with regions of star formation, not previously detected around these galaxies.
A class of gamma-ray bursts (GRBs) without a visible afterglow have been linked to galaxies with previously undetected dust clouds, astronomers announced Monday. "Dark" GRBs are so named because they have no detectable afterglow as visible or infrared wavelengths. Astronomers originally thought these GRBs were so distant that the light had been redshifted beyond detection. However, astronomers studied 14 such bursts and found that almost every one of them was associated with a galaxy that was visible in optical telescopes. Astronomers now believe the optical afterglow of these GRBs was absorbed by clouds of dust, perhaps associated with regions of star formation, not previously detected around these galaxies.
Related Links:
| <<previous article | next article>> |
|
news in brief
|
|
|
|
news links
|
|
Thursday, March 26
Firefly Aerospace Supports U.S. Space Force VICTUS DIEM Exercise
GlobeNewswire — 6:15 am ET (1015 GMT) Debrief: Starlink Constellation Grows To 10,000 Satellites
Aviation Week — 6:14 am ET (1014 GMT) Iceland and Norway join EU's Starlink competitor, IRIS2
EurActiv — 6:12 am ET (1012 GMT) Namibia officially explains rejection of Starlink application
CAJ News — 6:12 am ET (1012 GMT) White House pushes to finalize Huntsville as Space Command HQ; DOJ moves to dismiss Colorado lawsuit
WAFF-TV — 6:11 am ET (1011 GMT) |
