All Questions
Tagged with cosmology gravitational-waves
82
questions
4
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2
answers
1k
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If space can expand faster than light why can't gravitational wave?
I heard that gravitational wave is the measure of stretchiness of space time, so since there is no limit to how fast space can stretch what about gravitational wave?
- 13k
2
votes
2
answers
148
views
Gravitational wave of Big bang? [duplicate]
Questions about the g-wave caused by the big bang:
1)was there a g-wave produced?
2) when will it reach us?
3) will it be too weak for us to detect(atleast now?)?
- 997
0
votes
1
answer
77
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What are the implications of the LIGO results in reference to our current Cosmological models?
I was looking for some explicit information on the implications of the LIGO results or probing eras prior to the or near to the Big Bang singularity.
So, my question is therefore, what, if any, are ...
- 1,634
5
votes
3
answers
344
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How would we estimate, ahead of time, "the chances" of LIGO spotting black holes colliding in the period that it has been operating? [duplicate]
Can anyone summarize calculations that have been done about the theoretical probability of a detectable black hole collision happening in the observable universe within the time that LIGO has been ...
- 1,272
15
votes
2
answers
841
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Is there a Cosmic Gravitational Background Radiation (CGBR)?
The recent discovery by the LIGO made me wonder about this.
We know that there exists a CMBR, Cosmic Microwave Background Radiation, a blanket of electromagnetic energy covering the universe, made by ...
- 562
1
vote
2
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190
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Is the expanding of the universe also a cause which can induce gravitational waves from mass? [duplicate]
Gravitational waves arises when mass is rotating in another mass'orbital, in explosions and of course in case of colliding black holes. But are they also created when mass is moving and speeding ...
- 3,348
8
votes
1
answer
253
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How many galaxies could be the source of the recent LIGO detection?
The recent LIGO detection is pretty exciting, and a lot of people are asking whether there is a chance of optical detection of the black hole pair that created the signal. From a cursory reading of ...
- 134k
0
votes
0
answers
86
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Evidence of possible tidal effects close to a gravitational wave emitting system
Currently we are attempting to detect gravitational wave emissions using the LIGO gravitational wave detection system (and similiar systems), by attempting to detect very weak gravitational waves ...
user81619
5
votes
1
answer
575
views
Is inflation theory really dead?
I know the title is little bit challenging but maybe most of you heard about the last BICEP2 paper on February. As I have read about it here and here. My understanding is, BICEP2 results released on ...
- 1,151
2
votes
1
answer
77
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Are there other places to look for the gravitational wave, other than space?
The recent BICEP2 announcements about the existence of gravity waves made the news, and made a big pitch for cosmic inflation, in the process they also claimed to detect the existence of gravitational ...
- 303
8
votes
0
answers
135
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How do inflationary models predict the generation of gravitational waves during the inflationary period?
Recent results from the BICEP2 experiment have produced a lot of talk about the primordial gravitational waves produced during the inflationary period.
I would like to have some explanation about how ...
- 383
5
votes
2
answers
446
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gravitational waves and inflation theory
I am not a technical guy and I have no scientific knowloedge in physics but I have been reading books, watching videos in order to understand our cosmology and ...
- 185
8
votes
1
answer
350
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In the B mode power spectrum, what is the relationship between the multipole number and the wavelength of the seed gravitational waves?
One of the key datasets of the recent BICEP2 results is the B mode power spectrum shown below. The existence of these B modes implies the existence of gravitational waves prior to inflation.
My ...
- 7,063
8
votes
1
answer
307
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The BICEP2 data are evidence of gravitational waves and of inflation. Are they also the first observation that requires quantum gravity?
It strikes me that the recent announcement of data from BICEP2 contains two really Big Deals:
the first evidence of gravitational waves
the first evidence of inflation.
Is there also a third?
the ...
- 22.4k
9
votes
2
answers
158
views
CMB curly B-modes and dark matter
I raised a question a while ago regarding weak gravitational lensing of galaxies and the CMB. With all the fuzz with the BICEP2 data, I think it is time to raise even more questions about this amazing ...
- 14.5k