Year: 2016
Type: article
Abstract: We attempt to find a progenitor for the ultrafaint object Segue 1 under the assumption that it formed as a dark matter free star cluster in the past. We look for orbits, using the elongation of Segue 1 on the sky as a tracer of its path. Those orbits are followed backwards in time to find the starting points of our N-body simulations. The successful orbit, with which we can reproduce Segue 1 has a proper motion of μα = −0.19 mas yr−1 and μδ = −1.9 mas yr−1, placing Segue 1 near its apogalacticon today. Our best-fitting model has an initial mass of 6224 M⊙ and an initial scalelength of 5.75 pc.
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Awards: G249051994, G3880561207
OpenAlex ID: W2461985120