Questions tagged [interferometry]
Questions about astronomical observations which involve superimposing waves received by multiple, physically separated, receivers to obtain higher angular resolution.
67
questions
8
votes
2
answers
374
views
What makes small interferometers useful? Like NIRISS on JWST
NIRISS is an instrument on the James Webb Space Telescope. It has a "non-redundant aperture mask" which obviously covers most of the area of the sensor. It seems to be advantageous for high contrast ...
- 30.7k
4
votes
0
answers
169
views
What is a "limited array"?
I'm reading about the history and making of ESO's Very Large Telescope and I've found this article that says the scientific community had a choice between three suggestions: a one-piece 16m-telescope, ...
- 3,179
3
votes
1
answer
97
views
Can two detectors for gravitational waves be combined into a very long baseline interferometer?
While detectors for gravitational waves are interferometers themselves, the question here is about an increase in resolution resulting from two or more detectors far away from each other.
- 1,420
1
vote
1
answer
4k
views
How are people converting intensities in Janskys to Kelvin?
I'm reading some ALMA proposals and I am often seeing a conversion from Jy to Kelvin when, for example, people quote noise levels or source flux.
For example on their sensitivity calculator
(https://...
- 3,166
1
vote
0
answers
87
views
Calculating angular diameter amplitude from angular diameter variations of Cepheid variable
I'm a high school student but have as much interests in Cepheid variable as the professionalists. I'm trying to derive independent distances to Cepheid with the Baade-Wesselink method.
I got the ...
CommunityBot
- 1
2
votes
0
answers
41
views
Can any radio telescope be hooked up with the Very Long Baseline Array, or other interferometers?
The Very Long Baseline Array uses both Arecibo and Spectr-R, the world's largest space telescope with 10 m diameter at Lunar distance, as well as many other antennas. Are there any particular ...
- 11.4k
2
votes
0
answers
75
views
Can the expansion of spacetime be directly measured with laser interferometry (like GW can)
LIGO has a mind boggling sensitivity. What would it take to directly measure the expansion of spacetime, along the laser beam? I suppose it could be done at interplanetary scale.
- 11.4k