Questions tagged [gaia]

Questions about the space observatory GAIA.

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Why is it hard to reconcile Gaia DR2 with the HIP data set

I'm trying to get a database of about 20 million of the brightest stars in the sky for a project I'm working on, and I want to reconcile it with the Hipparcos data set. Currently, I'm only using the ...
Charles Lohr's user avatar
3 votes
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A question about using both the Simbad and the Gaia archive

It seems a bunch of people, including myself, have got it into our heads to create a 3D visualisation of the stars around us - one where you get to fly around them rather than view them from the ...
Awoogamuffin's user avatar
2 votes
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Computing the sky coordinates using astropy

I need your help with an error I have been receiving while trying to obtain the sky coordinates using astropy module in python. The code looks like the following, ...
CTZenScientist's user avatar
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Did Gaia DR3 help figure out whether Albireo is an optical double?

Based on the Wikipedia page of Albireo, Gaia DR2 had too much noise to determine whether the stars are physically associated or if they are just an optical double. Gaia DR3 was released last year. ...
usernumber's user avatar
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How to calculate the various properties of a star?

I am wanting to plot a velocity profile (a plot of velocity against the star's distance from the galactic core) from the Gaia DR2, but so far my efforts have been disappointing. The information I ...
Beta Decay's user avatar
2 votes
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Open cluster membership determination via parallaxes

I'm working in my final course project and I'm using the recently released GAIA DR2 data. I want to determine open clusters membership and I know this has mainly been done using proper motions and ...
Lith's user avatar
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Filtered Gaia DR3 datasets

I'm a programmer who'd like to process some of the smaller Gaia DR3 datasets. I ultimately want to use the Gaia Sky 15M default dataset, but decided to start with a smaller 1.9M dataset as a prototype....
aggregate1166877's user avatar
1 vote
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Using Gaia Passbands with L_nu coordinates

I am trying to find the coordinates of my bundles of gas on the gaia ($G, G_{bp}-G_{rp}$) hr diagram. I have its spectrum in $\nu L_\nu$ coordinates. Thus far, my attempts have mainly been to ...
Berkin's user avatar
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How do nuJ(nu) units work?

I'm working with (Nublado) Cloudy, which is essentially a spectral modelling tool for stellar matter. Using the software, I model my own stellar object and obtain its continuum. According to Hazy, ...
Berkin's user avatar
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Relationships between G magnitude, Johnson V magnitude, and spectral type of stars?

I'm simulating a population of binary stars for a summer research project. I'm adding uncertainties to my simulated observables such as angular position and radial (line of sight) velocity. I'm using ...
Sofia Splawska's user avatar
1 vote
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How to explain tidal tails and dark matter sub-halos in simple terms?

There is the exciting news by ESA entitled Is the nearest star cluster to the Sun being destroyed? Data from ESA’s Gaia star mapping satellite have revealed tantalising evidence that the nearest ...
B--rian's user avatar
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Plotting GAIA barycentric radial velocity data with python

Does anybody know of a good tutorial on how to use python and astropy to generate plots of GAIA, RAVE or any other database of barycentric (heliocentric) radial velocity data of stars in our galaxy? ...
Thomas Brennan's user avatar
1 vote
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What a grating on GAIA RVS spectroscope?

What size of the grating on GAIA RVS spectroscope ? How many lines on mm, or what defraction angle for 850 nm wavelenth light ? I find some more details here: http://sci.esa.int/gaia/44092-gaia-rvs-...
tsikraserg's user avatar
1 vote
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199 views

Photometry data from Gaia

I am trying to get data from Gaia. Especially for Cepheids or RR Lyrae. On Gaia websites it say they have released some of the data however I cannot find it. I am looking for two columns with time and ...
serosse's user avatar
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How to get target_id column from GAIA DR3 basic search?

When using the GAIA search through the website, the target_id column seems to pop up without any displayed column specified and disappears just as mysteriously. Does anybody know how to trigger that ...
ahni's user avatar
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Why can't ESA/NASA build a handful of Gaia telescopes and launch them into different positions in space for better accuracy?

I've noticed that many stars in GAIA DR2 have highly uncertain distances. Why can't a space agency send multiple Gaia spacecraft into orbit around different places (One in L2 Earth, one in ...
WarpPrime's user avatar
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