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New Cold Subdwarf Discoveries from Backyard Worlds and a Metallicity Classification System for T Subdwarfs

  • Authors: Adam J. Burgasser, Adam C. Schneider, Aaron M. Meisner, Dan Caselden, Chih-Chun Hsu, Roman Gerasimov, Christian Aganze, Emma Softich, Preethi Karpoor, Christopher A. Theissen, Hunter Brooks, Thomas P. Bickle, Jonathan Gagné, Ètienne Artigau, Michaël Marsset, Austin Rothermich, Jacqueline K. Faherty, J. Davy Kirkpatrick, Marc J. Kuchner, Nikolaj Stevnbak Andersen, Paul Beaulieu, Guillaume Colin, Jean Marc Gantier, Leopold Gramaize, Les Hamlet, Ken Hinckley, Martin Kabatnik, Frank Kiwy, David W. Martin, Diego H. Massat, William Pendrill, Arttu Sainio, Jörg Schümann, Melina Thévenot, Jim Walla, Zbigniew Wędracki

Adam J. Burgasser et al 2025 The Astrophysical Journal 982 .

  • Provider: AAS Journals

Caption: Figure 12.

Galactic orbits for the high-velocity sources (from top to bottom): J0532+8246, J1130+3139, J1553+6933, and J0140+0150. Orbits were calculated forward in time by 1 Gyr using galpy (J. Bovy 2015) with the MWPotential2014 potential. We assumed a solar motion from R. Schönrich et al. (2010), a local circular velocity of 220 km s−1, and R⊙ = 8 kpc. For J1553+6933, we extended the integration to 5 Gyr. The current location of each source is indicated by the magenta circle. We show 100 realizations of each object’s orbit by sampling uncertainties in distance, proper motion, and RV.

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