Authors
Keith Bechtol, Alex Drlica-Wagner, Eduardo Balbinot, Adriano Pieres, Josh D Simon, Brian Yanny, B Santiago, Risa H Wechsler, J Frieman, AR Walker, P Williams, Eduardo Rozo, ES Rykoff, A Queiroz, E Luque, Aurélien Benoit-Lévy, Douglas Tucker, I Sevilla, Robert A Gruendl, LN Da Costa, A Fausti Neto, Marcio Antonio Geimba Maia, Timothy Abbott, S Allam, Robert Armstrong, Anne Hollister Bauer, Gary M Bernstein, Rebecca A Bernstein, Emmanuel Bertin, D Brooks, Elizabeth Buckley-Geer, David Lyle Burke, A Carnero Rosell, FJ Castander, R Covarrubias, Christopher B D’Andrea, Darren L DePoy, S Desai, H Thomas Diehl, TF Eifler, Juan Estrada, August E Evrard, Enrique Fernandez, David A Finley, Brenna Flaugher, Enrique Gaztanaga, D Gerdes, L Girardi, M Gladders, Daniel Gruen, G Gutierrez, Jiangang Hao, K Honscheid, Bhuvnesh Jain, D James, S Kent, R Kron, Kyler Kuehn, N Kuropatkin, Ofer Lahav, TS Li, H Lin, Martín Makler, M March, J Marshall, Paul Martini, K Wyatt Merritt, C Miller, Ramon Miquel, J Mohr, E Neilsen, R Nichol, B Nord, R Ogando, John Peoples, D Petravick, AA Plazas, Anita K Romer, Aaron Roodman, Masao Sako, E Sanchez, V Scarpine, Michael Schubnell, Robert Christopher Smith, Marcelle Soares-Santos, Flávia Sobreira, Eric Suchyta, Molly EC Swanson, Gregory Tarle, J Thaler, D Thomas, W Wester, J Zuntz, DES Collaboration
Publication date
2015/6/30
Journal
The Astrophysical Journal
Volume
807
Issue
1
Pages
50
Publisher
IOP Publishing
Description
We report the discovery of eight new Milky Way companions in of optical imaging data collected during the first year of the Dark Energy Survey (DES). Each system is identified as a statistically significant over-density of individual stars consistent with the expected isochrone and luminosity function of an old and metal-poor stellar population. The objects span a wide range of absolute magnitudes (M V from to ), physical sizes (), and heliocentric distances (). Based on the low surface brightnesses, large physical sizes, and/or large Galactocentric distances of these objects, several are likely to be new ultra-faint satellite galaxies of the Milky Way and/or Magellanic Clouds. We introduce a likelihood-based algorithm to search for and characterize stellar over-densities, as well as identify stars with high satellite membership probabilities. We also present completeness estimates …
Scholar articles
K Bechtol, A Drlica-Wagner, E Balbinot, A Pieres… - The Astrophysical Journal, 2015