Repositório Digital

A- A A+

The tidal tails of NGC 2298

.

The tidal tails of NGC 2298

Mostrar registro completo

Estatísticas

Título The tidal tails of NGC 2298
Autor Balbinot, Eduardo
Santiago, Basilio Xavier
Costa, Luiz N. da
Makler, Martín
Maia, Marcio Antonio Geimba
Abstract We present an implementation of the matched-filter technique to detect tidal tails of globular clusters. The method was tested using the Sloan Digital Sky Survey (SDSS) data for the globular cluster Palomar 5 revealing its well-known tidal tails. We also ran a simulation of a globular cluster with a tidal tail where we successfully recover the tails for a cluster at the same position and with the same characteristics of NGC 2298. Based on the simulation we estimate that the matched-filter increases the contrast of the tail relative to the background of stars by a factor of 2.5 for the case of NGC 2298. We also present the photometry of the globular cluster NGC 2298 using the MOSAIC2 camera installed on the Cerro Tololo International Observatory (CTIO) 4-m telescope. The photometry covers ∼3 deg2 reaching V ∼ 23. A fit of a King profile to the radial density profile of NGC 2298 shows that this cluster has a tidal radius of 15.91±1.07 arcmin which is twice as in the literature. The application of the matched-filter to NGC 2298 reveals several extra-tidal structures, including a leading and trailing tail. We also find that NGC 2298 has extra-tidal structures stretching towards and against the Galactic disc, suggesting strong tidal interaction. Finally, we assess how the matched-filter performs when applied to a globular cluster with and without mass segregation taken into account. We find that disregarding the effects of mass segregation may significantly reduce the detection limit of the matched-filter.
Contido em Monthly notices of the royal astronomical society. Oxford. Vol. 416, no. 1 (Sep. 2011), p. 393-402
Assunto Aglomerados estelares
Aglomerados globulares
Luminosidade
[en] Galaxy: structure
[en] Globular clusters: general
[en] Globular clusters: individual: NGC 2298
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/93358
Arquivos Descrição Formato
000816289.pdf (4.965Mb) Texto completo (inglês) Adobe PDF Visualizar/abrir

Este item está licenciado na Creative Commons License

Este item aparece na(s) seguinte(s) coleção(ões)


Mostrar registro completo

Percorrer



  • O autor é titular dos direitos autorais dos documentos disponíveis neste repositório e é vedada, nos termos da lei, a comercialização de qualquer espécie sem sua autorização prévia.
    Projeto gráfico elaborado pelo Caixola - Clube de Criação Fabico/UFRGS Powered by DSpace software, Version 1.8.1.