%0 Generic %1 chen2016cosmological %A Chen, Jingjing %A Bryan, Greg L. %A Salem, Munier %D 2016 %K cosmic dwarf feedback galaxy ray %T Cosmological Simulations of Dwarf Galaxies with Cosmic Ray Feedback %U http://arxiv.org/abs/1605.06115 %X We perform zoom-in cosmological simulations of a suite of dwarf galaxies, examining the impact of cosmic-rays generated by supernovae, including the effect of diffusion. We first look at the effect of varying the uncertain cosmic ray parameters by repeatedly simulating a single galaxy. Then we fix the comic ray model and simulate five dwarf systems with virial masses range from 8-30 $10^10$ Msun. We find that including cosmic ray feedback (with diffusion) consistently leads to disk dominated systems with relatively flat rotation curves and constant star formation rates. In contrast, our purely thermal feedback case results in a hot stellar system and bursty star formation. The CR simulations very well match the observed baryonic Tully-Fisher relation, but have a lower gas fraction than in real systems. We also find that the dark matter cores of the CR feedback galaxies are cuspy, while the purely thermal feedback case results in a substantial core.

@misc{chen2016cosmological, abstract = {We perform zoom-in cosmological simulations of a suite of dwarf galaxies, examining the impact of cosmic-rays generated by supernovae, including the effect of diffusion. We first look at the effect of varying the uncertain cosmic ray parameters by repeatedly simulating a single galaxy. Then we fix the comic ray model and simulate five dwarf systems with virial masses range from 8-30 $\times 10^{10}$ Msun. We find that including cosmic ray feedback (with diffusion) consistently leads to disk dominated systems with relatively flat rotation curves and constant star formation rates. In contrast, our purely thermal feedback case results in a hot stellar system and bursty star formation. The CR simulations very well match the observed baryonic Tully-Fisher relation, but have a lower gas fraction than in real systems. We also find that the dark matter cores of the CR feedback galaxies are cuspy, while the purely thermal feedback case results in a substantial core.}, added-at = {2016-05-23T10:42:22.000+0200}, author = {Chen, Jingjing and Bryan, Greg L. and Salem, Munier}, biburl = {https://www.bibsonomy.org/bibtex/249b9fc06554a6f353f6bc6146f703aec/miki}, description = {[1605.06115] Cosmological Simulations of Dwarf Galaxies with Cosmic Ray Feedback}, interhash = {aa685004abb1ccc1e1bd4805a7ea5a1e}, intrahash = {49b9fc06554a6f353f6bc6146f703aec}, keywords = {cosmic dwarf feedback galaxy ray}, note = {cite arxiv:1605.06115Comment: 11 pages, 10 figures, MNRAS in press}, timestamp = {2016-05-23T10:42:22.000+0200}, title = {Cosmological Simulations of Dwarf Galaxies with Cosmic Ray Feedback}, url = {http://arxiv.org/abs/1605.06115}, year = 2016 }