Properties of unusual void LSBDs versus cosmological simulations predictions

Details Properties of unusual void LSBDs versus cosmological simulations predictions Properties of unusual void LSBDs versus cosmological simulations predictions

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011sf2a.conf...37m&link_type=abstract

SF2A-2011: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics Eds.: G. Alecian, K. Belkacem,

Astronomy and Astrophysics

Astrophysics

Galaxies: Voids

Scientific paper

We present the study of several unusual galaxies - low-mass, Low Surface Brightness Dwarfs (LSBD) (M_{bary} ˜ 3× 10^7 to ˜ 3× 10^9 M_{&sun;}, and M_{B} ˜ -(12-14.5)) which reside in the nearby Lynx-Cancer void. We confront their properties with the results from recent cosmological simulations, predicting both dynamical properties of low-mass objects and connecting their formation and evolution. In particular, we compare the rotational velocity, the baryonic mass and total dynamical mass with the predictions of Hoeft & Gottloeber (2010), which take into account the suppression of gas accretion onto the low-mass DM halos.

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