%0 Generic %1 stocke2014absorptionline %A Stocke, J. T. %A Keeney, B. A. %A Danforth, C. W. %A Syphers, D. %A Yamamoto, H. %A Shull, J. M. %A Green, J. C. %A Froning, C. %A Savage, B. D. %A Wakker, B. %A Kim, T. S. %A Ryan-Weber, E. V. %A Kacprzak, G. G. %D 2014 %K gas groups spiral warm %T Absorption-Line Detections of $10^5-6$ K Gas in Spiral-Rich Groups of Galaxies %U http://arxiv.org/abs/1405.4307 %X Using the Cosmic Origins Spectrograph (COS) on the Hubble Space Telescope (HST) the COS Science Team has conducted a high signal-to-noise survey of 14 bright QSOs. In a previous paper (Savage et al. 2014) these far-UV spectra were used to discover 14 "warm" ($T > 10^5$ K) absorbers using a combination of broad Ly\alpha\ and O VI absorptions. A reanalysis of a few of this new class of absorbers using slightly relaxed fitting criteria finds as many as 20 warm absorbers can be present in this sample. A shallow, wide spectroscopic galaxy redshift survey has been conducted around these sight lines to investigate the warm absorber environment, which is found to be spiral-rich galaxy groups or cluster outskirts with radial velocity dispersions of \sigma_v = 250-750 km/s. While 2\sigma\ evidence is presented favoring the hypothesis that these absorptions are associated with the galaxy groups and not with the individual nearest galaxies, this evidence has considerable systematic uncertainties and so is not conclusive. However, if the associations are with galaxy groups, the observed frequency of warm absorbers dN/dz = 3.5-5 per unit redshift plus the local density of galaxy groups require these warm absorbers to be very large (~1 Mpc in radius at high covering factor) and, if diffuse (i.e., high filling factor), very massive (> $10^11 M_ødot$). However, with only single probes through each group in this small sample, the conclusion that these "warm absorbers" are detections of a massive intra-group medium in spiral galaxy groups is tentative.

@misc{stocke2014absorptionline, abstract = {Using the Cosmic Origins Spectrograph (COS) on the Hubble Space Telescope (HST) the COS Science Team has conducted a high signal-to-noise survey of 14 bright QSOs. In a previous paper (Savage et al. 2014) these far-UV spectra were used to discover 14 "warm" ($T > 10^5$ K) absorbers using a combination of broad Ly\alpha\ and O VI absorptions. A reanalysis of a few of this new class of absorbers using slightly relaxed fitting criteria finds as many as 20 warm absorbers can be present in this sample. A shallow, wide spectroscopic galaxy redshift survey has been conducted around these sight lines to investigate the warm absorber environment, which is found to be spiral-rich galaxy groups or cluster outskirts with radial velocity dispersions of \sigma_v = 250-750 km/s. While 2\sigma\ evidence is presented favoring the hypothesis that these absorptions are associated with the galaxy groups and not with the individual nearest galaxies, this evidence has considerable systematic uncertainties and so is not conclusive. However, if the associations are with galaxy groups, the observed frequency of warm absorbers dN/dz = 3.5-5 per unit redshift plus the local density of galaxy groups require these warm absorbers to be very large (~1 Mpc in radius at high covering factor) and, if diffuse (i.e., high filling factor), very massive (> $10^{11} M_{\odot}$). However, with only single probes through each group in this small sample, the conclusion that these "warm absorbers" are detections of a massive intra-group medium in spiral galaxy groups is tentative.}, added-at = {2014-05-20T09:37:27.000+0200}, author = {Stocke, J. T. and Keeney, B. A. and Danforth, C. W. and Syphers, D. and Yamamoto, H. and Shull, J. M. and Green, J. C. and Froning, C. and Savage, B. D. and Wakker, B. and Kim, T. S. and Ryan-Weber, E. V. and Kacprzak, G. G.}, biburl = {https://www.bibsonomy.org/bibtex/2273234962fc24da6be424aadcaeb5086/miki}, description = {[1405.4307] Absorption-Line Detections of $10^{5-6}$ K Gas in Spiral-Rich Groups of Galaxies}, interhash = {c56a52a0a509297242a701ed14015786}, intrahash = {273234962fc24da6be424aadcaeb5086}, keywords = {gas groups spiral warm}, note = {cite arxiv:1405.4307Comment: 24 pages, 8 tables, 11 figures + Supplemental Appendices with additional tables and figures}, timestamp = {2014-05-20T09:37:27.000+0200}, title = {Absorption-Line Detections of $10^{5-6}$ K Gas in Spiral-Rich Groups of Galaxies}, url = {http://arxiv.org/abs/1405.4307}, year = 2014 }