Questions regarding large spheres of gas undergoing fusion.

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2
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1answer
6 views

Is black hole solely responsible for hyper velocity stars?

I read that the stars orbiting around Sagittarius A a.k.a supermassive black hole located at the heart of milky way galaxy moves very fast(many times faster than our Sun across the galaxy) and it is ...
-1
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1answer
47 views

Is there a publicly available Gliese Star List

Is there a publicly available list of the Gliese catalogue of nearby stars with their constellations? or a Gliese to Hipparcos List ?
6
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0answers
171 views

Magnetic fields of peculiar HgMn A type stars

Do HgMn (peculiar A type) stars really possess global magnetic fields? See, for example, this paper by Hubrig et al. from 2012.
2
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0answers
48 views

need data-point: actual counts per second with APD (avalanche photodiode) detector

I'm designing a sensor system to perform specialized [astronomy and space-sciences] experiments, and need a "reality check" to support or adjust my theoretical calculations. What I need is the ...
1
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0answers
13 views

How to calculate position of an unknown star knowing positions of some other stars from an image?

Suppose I know the coordinates (right ascension and declination) of the stars marked with red. How should I calculate the coordinates of an unknown star, marked with yellow? Searching over the web, ...
1
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0answers
26 views

Is Nomad data heliocentric or geocentric?

I'm wondering if the data in star catalogues are heliocentric equatorial coordinates or geocentric equatorial coordinates. Also given the distance between stars compared to the distance between the ...
1
vote
0answers
40 views

Triangular Asterism Trigonometry

Using the SIMBAD database for Alnitak, Saiph, and Sirius -- i.e.: Alnitak: FK5 coord. (J2000): RA = 05 40 45.527 DEC = -01 56 33.26; Saiph; FK5 coord. (J2000): RA = 05 47 45.389 DEC = -09 40 10.58; ...
0
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0answers
8 views

Can recession rate denotes the age of galaxy?

Since the universe came into existence and matters is formed much later on, the space have been expanding ever since and by measuring the Doppler shift(to calculate the rate of space expansion) ...