%0 Generic %1 bordoloi2014cosdwarfs %A Bordoloi, Rongmon %A Tumlinson, Jason %A Werk, Jessica K. %A Oppenheimer, Benjamin D. %A Peeples, Molly S. %A Prochaska, J. Xavier %A Tripp, Todd M. %A Katz, Neal %A Davé, Romeel %A Fox, Andrew %A Thom, Christopher %A Ford, Amanda Brady %A Weinberg, David H. %A Burchett, Joseph N. %A Kollmeier, Juna A. %D 2014 %K absorption carbon dwarfs galaxies reservoir %T The COS-Dwarfs Survey: The Carbon Reservoir Around sub-L* Galaxies %U http://arxiv.org/abs/1406.0509 %X We report new observations of circumgalactic gas from the COS-Dwarfs survey, a systematic investigation of the gaseous halos around 43 low-mass z $łeq$ 0.1 galaxies using background QSOs observed with the Cosmic Origins Spectrograph. From the projected 1D and 2D distribution of C IV absorption, we find that C IV absorption is detected out to ~ 0.5 R$_vir$ of the host galaxies. The C IV absorption strength falls off radially as a power law and beyond 0.5 R$_vir$, no C IV absorption is detected above our sensitivity limit of ~ 50-100 m$\AA$. We find a tentative correlation between detected C IV absorption strength and star formation, paralleling the strong correlation seen in highly ionized oxygen for L~L* galaxies by the COS-Halos survey. The data imply a large carbon reservoir in the CGM of these galaxies, corresponding to a minimum carbon mass of $\gtrsim$ 1.2$10^6$ $M_ødot$ out to ~ 110 kpc. This mass is comparable to the carbon mass in the ISM and more than the carbon mass currently in stars of these galaxies. The C IV absorption seen around these sub-L* galaxies can account for almost two-thirds of all $W_r$> 100 m$\AA$ C IV absorption detected at low z. Comparing the C IV covering fraction with hydrodynamical simulations, we find that an energy-driven wind model is consistent with the observations whereas a wind model of constant velocity fails to reproduce the CGM or the galaxy properties.

@misc{bordoloi2014cosdwarfs, abstract = {We report new observations of circumgalactic gas from the COS-Dwarfs survey, a systematic investigation of the gaseous halos around 43 low-mass z $\leq$ 0.1 galaxies using background QSOs observed with the Cosmic Origins Spectrograph. From the projected 1D and 2D distribution of C IV absorption, we find that C IV absorption is detected out to ~ 0.5 R$_{vir}$ of the host galaxies. The C IV absorption strength falls off radially as a power law and beyond 0.5 R$_{vir}$, no C IV absorption is detected above our sensitivity limit of ~ 50-100 m$\AA$. We find a tentative correlation between detected C IV absorption strength and star formation, paralleling the strong correlation seen in highly ionized oxygen for L~L* galaxies by the COS-Halos survey. The data imply a large carbon reservoir in the CGM of these galaxies, corresponding to a minimum carbon mass of $\gtrsim$ 1.2$\times 10^6$ $M_\odot$ out to ~ 110 kpc. This mass is comparable to the carbon mass in the ISM and more than the carbon mass currently in stars of these galaxies. The C IV absorption seen around these sub-L* galaxies can account for almost two-thirds of all $W_r$> 100 m$\AA$ C IV absorption detected at low z. Comparing the C IV covering fraction with hydrodynamical simulations, we find that an energy-driven wind model is consistent with the observations whereas a wind model of constant velocity fails to reproduce the CGM or the galaxy properties.}, added-at = {2014-06-04T09:25:35.000+0200}, author = {Bordoloi, Rongmon and Tumlinson, Jason and Werk, Jessica K. and Oppenheimer, Benjamin D. and Peeples, Molly S. and Prochaska, J. Xavier and Tripp, Todd M. and Katz, Neal and Davé, Romeel and Fox, Andrew and Thom, Christopher and Ford, Amanda Brady and Weinberg, David H. and Burchett, Joseph N. and Kollmeier, Juna A.}, biburl = {https://www.bibsonomy.org/bibtex/20428c0e2dfa925f2a089705701039661/miki}, description = {[1406.0509] The COS-Dwarfs Survey: The Carbon Reservoir Around sub-L* Galaxies}, interhash = {d4f0513b7bbf6039e331fd34cbf85217}, intrahash = {0428c0e2dfa925f2a089705701039661}, keywords = {absorption carbon dwarfs galaxies reservoir}, note = {cite arxiv:1406.0509Comment: 16 Pages, 10 Figures, ApJ submitted}, timestamp = {2014-06-04T09:25:35.000+0200}, title = {The COS-Dwarfs Survey: The Carbon Reservoir Around sub-L* Galaxies}, url = {http://arxiv.org/abs/1406.0509}, year = 2014 }