%0 Generic %1 tejos2013connection %A Tejos, Nicolas %A Morris, Simon L. %A Finn, Charles W. %A Crighton, Neil H. M. %A Bechtold, Jill %A Jannuzi, Buell T. %A Schaye, Joop %A Theuns, Tom %A Altay, Gabriel %A Fevre, Olivier Le %A Ryan-Weber, Emma %A Dave, Romeel %D 2013 %K HI absorption galaxy gas %T On the connection between the intergalactic medium and galaxies: The HI-galaxy cross-correlation at z < 1 %U http://arxiv.org/abs/1309.5950 %X We present a new optical spectroscopic survey of 1777 'star-forming' ('SF') and 366 'non-star-forming' ('non-SF') galaxies at redshifts z < 1 (2143 in total), 22 AGN and 423 stars, observed by instruments such as DEIMOS, VIMOS and GMOS, in 3 fields containing 5 quasi-stellar objects (QSOs) with HST UV spectroscopy. We also present a new spectroscopic survey of 165 'strong' (10^14 < NHI < 10^17 cm^-2), and 489 'weak' (10^13 < NHI < 10^14 cm^-2) intervening HI absorption line systems at z < 1 (654 in total), observed in the spectra of 8 QSOs by COS and FOS on the HST. Combining these new data with previously published galaxy catalogs such as VVDS and GDDS, we have gathered a sample of 654 HI absorption systems and 17509 galaxies at transverse scales < 50 Mpc. We present observational results on the HI-galaxy and galaxy-galaxy correlations at transverse scales r < 10 Mpc, and the HI-HI auto-correlation at transverse scales r < 2 Mpc. The two-point correlation functions are measured both along and transverse to the line-of-sight. We constrain the HI-galaxy statistical connection, as a function of both HI column density and galaxy star-forming activity. Our results are consistent with the following conclusions: (1) the bulk of HI systems on Mpc scales have little velocity dispersion (<120 km/s) with respect to the bulk of galaxies; (2) the vast majority of strong HI systems and SF galaxies are distributed in the same locations, together with 75+-15% of non-SF galaxies, all of which typically reside in dark matter haloes of similar masses; (3) 25+-15% of non-SF galaxies reside in galaxy clusters and are not correlated with strong HI systems at scales < 2 Mpc; and (4) 50% of weak HI systems reside within galaxy voids (hence not correlated with galaxies), and are confined in dark matter haloes of masses smaller than those hosting... abridged

@misc{tejos2013connection, abstract = {We present a new optical spectroscopic survey of 1777 'star-forming' ('SF') and 366 'non-star-forming' ('non-SF') galaxies at redshifts z < 1 (2143 in total), 22 AGN and 423 stars, observed by instruments such as DEIMOS, VIMOS and GMOS, in 3 fields containing 5 quasi-stellar objects (QSOs) with HST UV spectroscopy. We also present a new spectroscopic survey of 165 'strong' (10^14 < NHI < 10^17 cm^-2), and 489 'weak' (10^13 < NHI < 10^14 cm^-2) intervening HI absorption line systems at z < 1 (654 in total), observed in the spectra of 8 QSOs by COS and FOS on the HST. Combining these new data with previously published galaxy catalogs such as VVDS and GDDS, we have gathered a sample of 654 HI absorption systems and 17509 galaxies at transverse scales < 50 Mpc. We present observational results on the HI-galaxy and galaxy-galaxy correlations at transverse scales r < 10 Mpc, and the HI-HI auto-correlation at transverse scales r < 2 Mpc. The two-point correlation functions are measured both along and transverse to the line-of-sight. We constrain the HI-galaxy statistical connection, as a function of both HI column density and galaxy star-forming activity. Our results are consistent with the following conclusions: (1) the bulk of HI systems on Mpc scales have little velocity dispersion (<120 km/s) with respect to the bulk of galaxies; (2) the vast majority of strong HI systems and SF galaxies are distributed in the same locations, together with 75+-15% of non-SF galaxies, all of which typically reside in dark matter haloes of similar masses; (3) 25+-15% of non-SF galaxies reside in galaxy clusters and are not correlated with strong HI systems at scales < 2 Mpc; and (4) 50% of weak HI systems reside within galaxy voids (hence not correlated with galaxies), and are confined in dark matter haloes of masses smaller than those hosting... [abridged]}, added-at = {2013-09-25T16:56:55.000+0200}, author = {Tejos, Nicolas and Morris, Simon L. and Finn, Charles W. and Crighton, Neil H. M. and Bechtold, Jill and Jannuzi, Buell T. and Schaye, Joop and Theuns, Tom and Altay, Gabriel and Fevre, Olivier Le and Ryan-Weber, Emma and Dave, Romeel}, biburl = {https://www.bibsonomy.org/bibtex/25ae0de6e39e98305876e0e6730463730/miki}, description = {[1309.5950] On the connection between the intergalactic medium and galaxies: The HI-galaxy cross-correlation at z &lt; 1}, interhash = {5b27d3a81bf6167f837e236ef7f3f683}, intrahash = {5ae0de6e39e98305876e0e6730463730}, keywords = {HI absorption galaxy gas}, note = {cite arxiv:1309.5950Comment: 63 pages, 26 figures, 20 tables; To be accepted by MNRAS (reviewed); Comments still welcome}, timestamp = {2013-09-25T16:56:55.000+0200}, title = {On the connection between the intergalactic medium and galaxies: The HI-galaxy cross-correlation at z < 1}, url = {http://arxiv.org/abs/1309.5950}, year = 2013 }