| Texto completo | |
| Autor(es): |
Perottoni, Helio D.
[1, 2]
;
Martin, Charles
[1]
;
Newberg, Heidi Jo
[1]
;
Rocha-Pinto, Helio J.
[2]
;
de Almeida-Fernandes, Felipe
[2]
;
Gomes-Junior, Altair R.
[3, 2]
Número total de Autores: 6
|
| Afiliação do(s) autor(es): | [1] Rensselaer Polytech Inst, Dept Phys Appl Phys & Astron, Troy, NY 12180 - USA
[2] Univ Fed Rio de Janeiro, Observ Valongo, Lad Pedro Antonio 43, BR-20080090 Rio De Janeiro - Brazil
[3] UNESP Sao Paulo State Univ, Grp Dinam Orbital & Planetol, BR-12516410 Guaratingueta, SP - Brazil
Número total de Afiliações: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Monthly Notices of the Royal Astronomical Society; v. 486, n. 1, p. 843-850, JUN 2019. |
| Citações Web of Science: | 1 |
| Resumo | |
We report the serendipitous discovery of a stellar stream in the constellation Pegasus in the south Galactic hemisphere. The stellar stream was detected using the SDSS Data Release 14 by means of a matched filter in the colour-magnitude diagram that is optimized for a stellar population that is 8 Gyr old with {[}Fe/H]=-0.46 dex, and located at heliocentric distance of 18 kpc. The candidate stream is faint (turn-off point at r(0) similar to 19.6), sparse and barely visible in SDSS photometry. It is also detected in the (shallower) Pan-STARRs data. The residual stellar density in the (u - g)(0), (g - r)(0) colour-colour diagram gives the same estimate for the age and {[}Fe/H] of this stellar population. The stream is located at a Galactic coordinates (l, b) = (79.4 degrees, -24.6 degrees) and extends over 9 degrees (2.5 kpc), with a width of 112 pc. The narrow width suggests a globular cluster progenitor. (AU) | |
| Processo FAPESP: | 18/11239-8 - Determinação de órbitas de satélites e anéis a partir da análise de imagens por sondas espaciais |
| Beneficiário: | Altair Ramos Gomes Junior |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |