SIMBAD references

2018MNRAS.480.2284C - Mon. Not. R. Astron. Soc., 480, 2284-2291 (2018/October-3)

A Gaia DR2 search for dwarf galaxies towards Fermi-LAT sources: implications for annihilating dark matter.

CIUCA I., KAWATA D., ANDO S., CALORE F., READ J.I. and MATEU C.

Abstract (from CDS):

We make the first attempt to find dwarf galaxies in eight Fermi-LAT extended, unassociated, source fields using Gaia DR2. After probing previously unexplored heliocentric distances of d < 20 kpc with an extreme-deconvolution (XD) technique, we find no sign of a dwarf galaxy in any of these fields despite Gaia's excellent astrometric accuracy. Our detection limits are estimated by applying the XD method to mock data, obtaining a conservative limit on the stellar mass of M* < 104 M☉ for d < 20 kpc. Such a low stellar mass implies either a low-mass subhalo or a massive stripped-down subhalo. We use an analytic model for stripped subhaloes to argue that, given the sizes and fluxes of the Fermi-LAT sources, we can reject the hypothesis that they owe to dark matter annihilation.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): catalogues - astrometry - Galaxy: halo - Galaxy: structure - galaxies: dwarf - gamma-rays: general

CDS comments: Misprints: 3FGL J1924.8+1034 = 3FGL J1924.8-1034, FHES J1501.0+6310 = FHES J1501.0-6310, FHES J1723.5+0501 = FHES J1723.5-0501, FHES J1741.6+3917 = FHES J1741.6-3917.

Simbad objects: 15

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