Constraining Dark Matter with Stellar Streams

[norashipp]

Constraining Dark Matter with Stellar Streams

Contacts: @norashipp, @psferguson, @marinekuna Day/Time: Main communication channel: #desc-dkm-stellar-streams GitHub repo: LSSTDESC/stream_sim Zoom room (if applicable):

Goals and deliverable

Our goal is to start making concrete progress towards developing the tools needed to make dark matter constraints with stellar streams in early LSST data.

Resources and skills needed

Enthusiasm and an interest in dark matter

Detailed description

There are three main components of the project:

• Simulations: making predictions for the imprint on stellar streams of subhalo populations in different dark matter models)
• Analysis: developing a pipeline to measure the effect of subhalo perturbations on stellar streams in LSST data)
• Data: understanding the effect of e.g. survey systematics on our measurements

We would love to have new participants in any/all of these components!

[psferguson]

Marine's Power Spectrum analysis: https://gist.github.com/psferguson/dab1ea908b1cc44822df89aa07ec716a

[psferguson]

Nathaniel's projected distance example: https://gist.github.com/psferguson/7d0729ee44b03ed9fa7026ec0cf255e2

[nstarman]

Nathan's projected distance example: https://gist.github.com/psferguson/7d0729ee44b03ed9fa7026ec0cf255e2

This does the 1D projection onto the stream. It's fairly easy to also extract the orthogonal distance, e.g. for 2D analysis.

[psferguson]

@nonsk131 's notebook on the bovy action angle stream generation: https://gist.github.com/psferguson/15f01f398fd2e7aa323bbb198c6e7c73