new schema: Members of Tidal Streams

[kelle]

Stellar streams are disrupted dwarf galaxies and star clusters that are tidally stretched into thin, dynamically cold structures. We now know of over 100 streams orbiting around the Milky Way. These Milky Way streams were discovered with a mix of different methods that use photometry, spectroscopy, or astrometry, or combinations of these. The data for stellar stream member stars is therefore heterogeneous and often not archived or stored in a consistent way. We aim to create a database of stellar stream member star data, compiled from existing stellar surveys (e.g., Gaia) and from follow-up efforts reported in individual publications, to provide a uniform interface for accessing these datasets.
@adrn @cmateu.

[kelle]

Other Notes:
There are ~100 known streams, and probably only (on average) a few hundred members. A few streams (like the Sagittarius stream) will have thousands of members itself, but most are much smaller. However, I could imagine us wanting to keep track of membership probabilities or statistics for more stars in fields around the streams, so with that scope it would be ~10^4–10^5 stars per stream.

[adrn]

For some more context, a recent review article: https://arxiv.org/abs/2405.19410
Also relevant: https://arxiv.org/abs/2204.10326 - galstreams compilation of 95 stellar streams

[kelle]

Thanks @adrn -- that is helpful! But, it looks like both of those references have data on the streams. Don't we want a schema for the stellar members? Do you have any tables with example data on the stream members?

[cmateu]

I’ve just sent you an invite to a Google folder that contains the tables with public member data for the streams collated in the current version of galstreams. See you in a bit.

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On Feb 12, 2025, at 3:24 PM, Kelle Cruz ***@***.***> wrote: Thanks @adrn <https://github.com/adrn> -- that is helpful! But, it looks like both of those references have data on the streams. Don't we want a schema for the stellar members? Do you have any tables with example data on the stream members? — Reply to this email directly, view it on GitHub <#103 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABF5BCD5FZAURGNDQGTPXID2POGVFAVCNFSM6AAAAABWPPWABWVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDMNJUGUZDCMJWG4>. You are receiving this because you were mentioned.

[cmateu]

Here’s the link to the Google folder: https://drive.google.com/drive/folders/1mPkxDSYYxKVW-7Tn8C61tCLqQgiUCl6n?usp=share_link

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On Feb 12, 2025, at 3:24 PM, Kelle Cruz ***@***.***> wrote: Thanks @adrn <https://github.com/adrn> -- that is helpful! But, it looks like both of those references have data on the streams. Don't we want a schema for the stellar members? Do you have any tables with example data on the stream members? — Reply to this email directly, view it on GitHub <#103 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABF5BCD5FZAURGNDQGTPXID2POGVFAVCNFSM6AAAAABWPPWABWVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDMNJUGUZDCMJWG4>. You are receiving this because you were mentioned.

[kelle]

Things which will be customized (not in the template)

• tracks - children of streams
• coordinates table - include phi1, phi2?

ModeledParameters, include in Parameters reference table

• distance
• FeH
• reddening (Av)