%0 Generic %1 blomqvist2019baryon %A Blomqvist, Michael %A Bourboux, Hélion du Mas des %A Busca, Nicolás G. %A Agathe, Victoria de Sainte %A Rich, James %A Balland, Christophe %A Bautista, Julian E. %A Dawson, Kyle %A Font-Ribera, Andreu %A Guy, Julien %A Goff, Jean-Marc Le %A Palanque-Delabrouille, Nathalie %A Percival, Will J. %A Pérez-Ràfols, Ignasi %A Pieri, Matthew M. %A Schneider, Donald P. %A Slosar, Anže %A Yèche, Christophe %D 2019 %K library %T Baryon acoustic oscillations from the cross-correlation of Ly\alpha absorption and quasars in eBOSS DR14 %U http://arxiv.org/abs/1904.03430 %X We present a measurement of the baryon acoustic oscillation (BAO) scale at redshift $z=2.35$ from the three-dimensional correlation of Lyman-$\alpha$ (Ly$\alpha$) forest absorption and quasars. The study uses 266,590 quasars in the redshift range $1.77<z<3.5$ from the Sloan Digital Sky Survey (SDSS) Data Release 14 (DR14). The sample includes the first two years of observations by the SDSS-IV extended Baryon Oscillation Spectroscopic Survey (eBOSS), providing new quasars and re-observations of BOSS quasars for improved statistical precision. Statistics are further improved by including Ly$\alpha$ absorption occurring in the Ly$\beta$ wavelength band of the spectra. From the measured BAO peak position along and across the line of sight, we determine the Hubble distance $D_H$ and the comoving angular diameter distance $D_M$ relative to the sound horizon at the drag epoch $r_d$: $D_H(z=2.35)/r_d=9.200.36$ and $D_M(z=2.35)/r_d=36.31.8$. These results are consistent at $1.5\sigma$ with the prediction of the best-fit flat $Łambda$CDM cosmological model reported for the Planck (2016) analysis of CMB anisotropies. Combined with the Ly$\alpha$ auto-correlation measurement presented in a companion paper (de Sainte Agathe et al. 2019) the BAO measurements at $z=2.34$ are within $1.7\sigma$ of the predictions of this model.

@misc{blomqvist2019baryon, abstract = {We present a measurement of the baryon acoustic oscillation (BAO) scale at redshift $z=2.35$ from the three-dimensional correlation of Lyman-$\alpha$ (Ly$\alpha$) forest absorption and quasars. The study uses 266,590 quasars in the redshift range $1.77<z<3.5$ from the Sloan Digital Sky Survey (SDSS) Data Release 14 (DR14). The sample includes the first two years of observations by the SDSS-IV extended Baryon Oscillation Spectroscopic Survey (eBOSS), providing new quasars and re-observations of BOSS quasars for improved statistical precision. Statistics are further improved by including Ly$\alpha$ absorption occurring in the Ly$\beta$ wavelength band of the spectra. From the measured BAO peak position along and across the line of sight, we determine the Hubble distance $D_{H}$ and the comoving angular diameter distance $D_{M}$ relative to the sound horizon at the drag epoch $r_{d}$: $D_{H}(z=2.35)/r_{d}=9.20\pm 0.36$ and $D_{M}(z=2.35)/r_{d}=36.3\pm 1.8$. These results are consistent at $1.5\sigma$ with the prediction of the best-fit flat $\Lambda$CDM cosmological model reported for the Planck (2016) analysis of CMB anisotropies. Combined with the Ly$\alpha$ auto-correlation measurement presented in a companion paper (de Sainte Agathe et al. 2019) the BAO measurements at $z=2.34$ are within $1.7\sigma$ of the predictions of this model.}, added-at = {2019-04-09T05:12:12.000+0200}, author = {Blomqvist, Michael and Bourboux, Hélion du Mas des and Busca, Nicolás G. and Agathe, Victoria de Sainte and Rich, James and Balland, Christophe and Bautista, Julian E. and Dawson, Kyle and Font-Ribera, Andreu and Guy, Julien and Goff, Jean-Marc Le and Palanque-Delabrouille, Nathalie and Percival, Will J. and Pérez-Ràfols, Ignasi and Pieri, Matthew M. and Schneider, Donald P. and Slosar, Anže and Yèche, Christophe}, biburl = {https://www.bibsonomy.org/bibtex/25e50d5de8819ff216c9ea680fac26d6c/gpkulkarni}, description = {Baryon acoustic oscillations from the cross-correlation of Ly{\alpha} absorption and quasars in eBOSS DR14}, interhash = {66cec96027e4ce759a217c1175e2a2fa}, intrahash = {5e50d5de8819ff216c9ea680fac26d6c}, keywords = {library}, note = {cite arxiv:1904.03430Comment: 16 pages, 13 figures, submitted to A&A}, timestamp = {2019-04-09T05:12:12.000+0200}, title = {Baryon acoustic oscillations from the cross-correlation of Ly{\alpha} absorption and quasars in eBOSS DR14}, url = {http://arxiv.org/abs/1904.03430}, year = 2019 }