Cataloging Accreted Stars within Gaia DR2 Using Deep Learning

In [1907.06652], a neural network is used to determine whether a star was accreted onto the Milky Way or was born in situ using only 5D phase space information. The inputs to the network are [l, b, parallax, pmra, pmdec] from the Gaia DR2 catalog. Stars with a score greater than 0.75 are marked as accreted. The dataset provided here is the subset of stars with 6D phase space information, which was studied in more detail in [1907.07190] and [1907.07681]. More data will be released upon publication of the papers. In this release of the catalog, the first columns of the CSV are ['source_id', 'l', 'b', 'ra', 'dec', 'parallax', 'pmra', 'pmdec', 'radial_velocity'] as given by Gaia, which should allow for easy cross-matching. We additionally give some information about the network score for the star ['S&lt;=0.75', 'S&gt;0.75', 'S&gt;0.95']. Less than 0.75 should be interpreted as in situ, greater than 0.75 is accreted, and greater than 0.95 is accreted with high confidence. If you use our catalog in any of your works, please cite <br> @article{Ostdiek:2019gnb,<br> author = "Ostdiek, Bryan and Necib, Lina and Cohen, Timothy and<br> Freytsis, Marat and Lisanti, Mariangela and<br> Garrison-Kimmel, Shea and Wetzel, Andrew and Sanderson,<br> Robyn E. and Hopkins, Philip F.",<br> title = "{Cataloging Accreted Stars within Gaia DR2 using Deep<br> Learning}",<br> year = "2019",<br> eprint = "1907.06652",<br> archivePrefix = "arXiv",<br> primaryClass = "astro-ph.GA",<br> SLACcitation = "%%CITATION = ARXIV:1907.06652;%%”<br> }<br> and <br> @article{Necib:2019zka,<br> author = "Necib, Lina and Ostdiek, Bryan and Lisanti, Mariangela<br> and Cohen, Timothy and Freytsis, Marat and<br> Garrison-Kimmel, Shea",<br> title = "{Chasing Accreted Structures within Gaia DR2 using Deep<br> Learning}",<br> year = "2019",<br> eprint = "1907.07681",<br> archivePrefix = "arXiv",<br> primaryClass = "astro-ph.GA",<br> SLACcitation = "%%CITATION = ARXIV:1907.07681;%%”<br> }.<br> Also, please cite <br> @article{Necib:2019zbk,<br> author = "Necib, Lina and Ostdiek, Bryan and Lisanti, Mariangela<br> and Cohen, Timothy and Freytsis, Marat and<br> Garrison-Kimmel, Shea and Hopkins, Philip F. and Wetzel,<br> Andrew and Sanderson, Robyn",<br> title = "{Evidence for a Vast Prograde Stellar Stream in the Solar<br> Vicinity}",<br> year = "2019",<br> eprint = "1907.07190",<br> archivePrefix = "arXiv",<br> primaryClass = "astro-ph.GA",<br> SLACcitation = "%%CITATION = ARXIV:1907.07190;%%"<br> }<br> for any follow up study of Nyx.