EDP Sciences
Free access
Issue A&A
Volume 405, Number 2, July II 2003
Page(s) 577 - 583
Section Stellar clusters and associations
DOI http://dx.doi.org/10.1051/0004-6361:20030649

A&A 405, 577-583 (2003)
DOI: 10.1051/0004-6361:20030649

Tracing the Sgr Stream with 2MASS

Detection of Stream stars around Outer Halo globular clusters
M. Bellazzini1, R. Ibata2, F. R. Ferraro3 and V. Testa4

1  INAF - Osservatorio Astronomico di Bologna, via Ranzani 1, 40127 Bologna, Italy
2  Observatoire de Strasbourg, 67000 Strasbourg, France
    e-mail: ibata@astro.u-strasbg.fr
3  Dipartimento di Astronomia, Università di Bologna, via Ranzani 1, 40127 Bologna, Italy
    e-mail: ferraro@bo.astro.it
4  INAF - Osservatorio Astronomico di Roma, via Frascati 33, 00040 Monte Porzio Catone, Italy
    e-mail: testa@mporzio.astro.it

(Received 24 February 2003 / Accepted 24 April 2003)

We use infrared Color Magnitude Diagrams from the 2-Micron All-Sky Survey (2MASS) to search for stars belonging to the tidal stream of the Sagittarius dwarf spheroidal galaxy (Sgr dSph) around selected Galactic globular clusters. Statistically significant detections are presented for the cases of Pal 12 and NGC 4147, strongly supporting the idea that these clusters are associated with the Sgr Stream and that they were previous members of the Sgr dSph galaxy.

Key words: Galaxy: halo -- Galaxy: structure -- globular clusters: individual: Pal 12, NGC 4147

Offprint request: M. Bellazzini, bellazzini@bo.astro.it

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Editor-in-Chief: T. Forveille
Letters Editor-in-Chief: J. Alves
Managing Editor: C. Bertout

ISSN: 0004-6361 ; e-ISSN: 1432-0746
Frequency: 12 volumes per year
Published by: EDP Sciences

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