How is spectroscopic parallax is determined?

Md Ariful Islam

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Md Ariful Islam

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Excellent discussion and graphics here:

The term spectroscopic parallax is a misnomer as it actually has nothing to do with parallax. It is, however, a way to find the distance to stars. Good luminosity chart and example of its use here:

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What is spectroscopic parallax?

As we know the stars as viewed from the earth are not seen as in their actual position due to atmospheric refraction.But in this method we calculate the distance to...

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How do you find the parsecs and light-years away a star is from the parallax angle? For example, Sirius has a 0.379s parallax angle. How would you get the parsecs and light-years away?

For your long-term-memory: If $alpha$ radian is the parsec angle, the formula for distance = 1/$alpha$ AU. Here, $alpha$=(0.379/3600)($pi$/180) radian.=1.8374 E-06 radian. So, d=1/1.8374 AU=544000 AU. Unit conversions: In lu...

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We can't detect stellar parallax with naked-eye observations. What makes parallax easier to observe?

A telescope allows us to see more stars in a limited region. By having more stars to look at, we have a better chance of seeing them shift in the...

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How would you use the parallax formula to determine the distances to a star (in parsecs)? The parallax angle is 0.0012516.

The angle has to be in second ( '' ) unit. For 1'' parallax angle, the distance is 1 parsec. For other values in seconds, the distance = 1/(angle in...

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How would you use the parallax formula to determine the distances to a star (in parsecs)? The parallax angle is 0.002790.

I assume that the unit for angle is 1 degree. By definition of parsec, for parallax angle 1sec, the distance is 1 parsec. So, for $0.002790^o= 0.002790 X 3600...

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How would you use the parallax formula to determine the distances to a star (in parsecs)? The parallax angle is 0.001293.

distance= 1/ parallax in arc secs. 1/.0012293 773.34 parsecs.

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The star Wolf 1061 has a parallax of 2.34 arcseconds, while the star Ross 652 has a parallax of 1.70 arc seconds. What can you infer from this information?

The distance of a star with parallax 1 arc sec is 1 parsec. The distance of a star with parallax k arc sec is k parsec. 1 parsec = 206265...

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Star A has a parallax of 0.04 seconds of arc. Star B has a parallax of 0.02 seconds of arc. Which star is more distant from the sun? What is the distance to star A from the sun, in parsecs? thanks?

The relationship between a star's distance and its parallax angle is given by $d = 1/p$, where the distance $d$ is measured in parsecs (equal to $3.26$ light years) and...

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What should we observe in an $""^1H$ $"NMR spectroscopic"$ experiment?

Symmetry can sometimes be used to interpret an NMR spectrum, , and also The above treatment will tell you HOW many signals you should see in the spectrum; it...

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Using spectroscopic measurements, what physical process is being observed?

Adsorption spectroscopy measures the amount of a wavelength adsorbed by a substance. Emission spectroscopy measures the amount of a wavelength emitted by a substance after excitation. In both versions,...

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