Near-Field Cosmology with RR Lyrae Variable Stars: a first view of substructure in the southern sky
link https://doi.org/10.1017/S1743921315007012account_box Navarrete, C.account_box Duffau, S.account_box Vivas, A. K.account_box Catelan, Márcioaccount_box Hajdu, G.account_box Torrealba, G.account_box Cortés, C.account_box Belokurov, V.account_box Koposov, S.account_box Drake, A. J.
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We present the current status of the spectroscopic follow-up of a large number of RR Lyrae (RRL) halo overdensity candidates recently found by Torrealba et al. (2015) using southern-hemisphere data from the Catalina Real-time Transient Survey (CRTS). Characterizing the individual RRL stars in these overdensities is crucial to confirm them as real halo substructures. Low-resolution spectra have been obtained for RRL stars in 11 different overdensities, using the SOAR and Magellan telescopes. Radial velocities and metallicities have been derived so far for 123 and 99 RRL stars, respectively....
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| Autor | Navarrete, C. Duffau, S. Vivas, A. K. Catelan, Márcio Hajdu, G. Torrealba, G. Cortés, C. Belokurov, V. Koposov, S. Drake, A. J. |
| Título | Near-Field Cosmology with RR Lyrae Variable Stars: a first view of substructure in the southern sky |
| Fecha de publicación | 2016 |
| Resumen | We present the current status of the spectroscopic follow-up of a large number of RR Lyrae (RRL) halo overdensity candidates recently found by Torrealba et al. (2015) using southern-hemisphere data from the Catalina Real-time Transient Survey (CRTS). Characterizing the individual RRL stars in these overdensities is crucial to confirm them as real halo substructures. Low-resolution spectra have been obtained for RRL stars in 11 different overdensities, using the SOAR and Magellan telescopes. Radial velocities and metallicities have been derived so far for 123 and 99 RRL stars, respectively.... |
| Derechos | acceso restringido |
| DOI | 10.1017/S1743921315007012 |
| Enlace | |
| Id de publicación en WoS | WOS:000450815700075 |
| Tipo de documento | preprint |