SIMBAD references

2015ApJ...802L..18L - Astrophys. J., 802, L18 (2015/April-1)

A new faint Milky Way satellite discovered in the Pan-STARRS1 3π survey.

LAEVENS B.P.M., MARTIN N.F., IBATA R.A., RIX H.-W., BERNARD E.J., BELL E.F., SESAR B., FERGUSON A.M.N., SCHLAFLY E.F., SLATER C.T., BURGETT W.S., CHAMBERS K.C., FLEWELLING H., HODAPP K.A., KAISER N., KUDRITZKI R.-P., LUPTON R.H., MAGNIER E.A., METCALFE N., MORGAN J.S., PRICE P.A., TONRY J.L., WAINSCOAT R.J. and WATERS C.

Abstract (from CDS):

We present the discovery of a faint Milky Way satellite, Laevens 2/Triangulum II, found in the Panoramic Survey Telescope And Rapid Response System 3π imaging data and confirmed with follow-up wide-field photometry from the Large Binocular Cameras. The stellar system, with an absolute magnitude of MV= -1.8±0.5, a heliocentric distance of 30–22 kpc, and a half-mass-radius of 34 –8+9 pc, shows remarkable similarity to faint, nearby, small satellites such as Willman 1, Segue 1, Segue 2, and Boötes II. The discovery of Laevens 2/Triangulum II further populates the region of parameter space for which the boundary between dwarf galaxies and globular clusters becomes tenuous. Follow-up spectroscopy will ultimately determine the nature of this new satellite, whose spatial location hints at a possible connection with the complex Triangulum-Andromeda stellar structures.

Abstract Copyright:

Journal keyword(s): galaxies: dwarf - Galaxy: structure - globular clusters: general - Local Group

Nomenclature: NAME Laevens 2/Triangulum II = NAME Lae 2/Tri II.

Simbad objects: 16

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