%0 Generic %1 collaboration2019euclid %A Collaboration, Euclid %A Barnett, R. %A Warren, S. J. %A Mortlock, D. J. %A Cuby, J. G. %A Conselice, C. %A Hewett, P. C. %A Willott, C. J. %A Auricchio, N. %A Balaguera-Antolínez, A. %A Baldi, M. %A Bardelli, S. %A Bellagamba, F. %A Bender, R. %A Biviano, A. %A Bonino, D. %A Bozzo, E. %A Branchini, E. %A Brescia, M. %A Brinchmann, J. %A Burigana, C. %A Camera, S. %A Capobianco, V. %A Carbone, C. %A Carretero, J. %A Carvalho, C. S. %A Castander, F. J. %A Castellano, M. %A Cavuoti, S. %A Cimatti, A. %A Clédassou, R. %A Congedo, G. %A Conversi, L. %A Copin, Y. %A Corcione, L. %A Coupon, J. %A Courtois, H. M. %A Cropper, M. %A Da Silva, A. %A Duncan, C. A. J. %A Dusini, S. %A Ealet, A. %A Farrens, S. %A Fosalba, P. %A Fotopoulou, S. %A Fourmanoit, N. %A Frailis, M. %A Fumana, M. %A Galeotta, S. %A Garilli, B. %A Gillard, W. %A Gillis, B. R. %A Graciá-Carpio, J. %A Grupp, F. %A Hoekstra, H. %A Hormuth, F. %A Israel, H. %A Jahnke, K. %A Kermiche, S. %A Kilbinger, M. %A Kirkpatrick, C. C. %A Kitching, T. %A Kohley, R. %A Kubik, B. %A Kunz, M. %A Kurki-Suonio, H. %A Laureijs, R. %A Ligori, S. %A Lilje, P. B. %A Lloro, I. %A Maiorano, E. %A Mansutti, O. %A Marggraf, O. %A Martinet, N. %A Marulli, F. %A Massey, R. %A Mauri, N. %A Medinaceli, E. %A Mei, S. %A Mellier, Y. %A Metcalf, R. B. %A Metge, J. J. %A Meylan, G. %A Moresco, M. %A Moscardini, L. %A Munari, E. %A Neissner, C. %A Niemi, S. M. %A Nutma, T. %A Padilla, C. %A Paltani, S. %A Pasian, F. %A Paykari, P. %A Percival, W. J. %A Pettorino, V. %A Polenta, G. %A Poncet, M. %A Pozzetti, L. %A Raison, F. %A Renzi, A. %A Rhodes, J. %A Rix, H. W. %A Romelli, E. %A Roncarelli, M. %A Rossetti, E. %A Saglia, R. %A Sapone, D. %A Scaramella, R. %A Schneider, P. %A Scottez, V. %A Secroun, A. %A Serrano, S. %A Sirri, G. %A Stanco, L. %A Sureau, F. %A Tallada-Crespí, P. %A Tavagnacco, D. %A Taylor, A. N. %A Tenti, M. %A Tereno, I. %A Toledo-Moreo, R. %A Torradeflot, F. %A Valenziano, L. %A Vassallo, T. %A Wang, Y. %A Zacchei, A. %A Zamorani, G. %A Zoubian, J. %A Zucca, E. %D 2019 %K library %T Euclid preparation: V. Predicted yield of redshift 7<z<9 quasars from the wide survey %U http://arxiv.org/abs/1908.04310 %X We provide predictions of the yield of $7<z<9$ quasars from the Euclid wide survey, updating the calculation presented in the Euclid Red Book (Laureijs et al. 2011) in several ways. We account for revisions to the Euclid near-infrared filter wavelengths; we adopt steeper rates of decline of the quasar luminosity function (QLF; $\Phi$) with redshift, $\Phi\propto10^k(z-6)$, $k=-0.72$, consistent with Jiang et al. (2016), and a further steeper rate of decline, $k=-0.92$; we use better models of the contaminating populations (MLT dwarfs and compact early-type galaxies); and we use an improved Bayesian selection method, compared to the colour cuts used for the Red Book calculation, allowing the identification of fainter quasars, down to $J_AB\sim23$. Quasars at $z>8$ may be selected from Euclid $OYJH$ photometry alone, but selection over the redshift interval $7<z<8$ is greatly improved by the addition of $z$-band data from, e.g., Pan-STARRS and LSST. We calculate predicted quasar yields for the assumed values of the rate of decline of the QLF beyond $z=6$. For the case that the decline of the QLF accelerates beyond $z=6$, with $k=-0.92$, Euclid should nevertheless find over 100 quasars with $7.0<z<7.5$, and $\sim25$ quasars beyond the current record of $z=7.5$, including $\sim8$ beyond $z=8.0$. The first Euclid quasars at $z>7.5$ should be found in the DR1 data release, expected in 2024. It will be possible to determine the bright-end slope of the QLF, $7<z<8$, $M_1450<-25$, using 8m class telescopes to confirm candidates, but follow-up with JWST or E-ELT will be required to measure the faint-end slope. Contamination of the candidate lists is predicted to be modest even at $J_AB\sim23$. The precision with which $k$ can be determined over $7<z<8$ depends on the value of $k$, but assuming $k=-0.72$ it can be measured to a 1 sigma uncertainty of 0.07.

@misc{collaboration2019euclid, abstract = {We provide predictions of the yield of $7<z<9$ quasars from the Euclid wide survey, updating the calculation presented in the Euclid Red Book (Laureijs et al. 2011) in several ways. We account for revisions to the Euclid near-infrared filter wavelengths; we adopt steeper rates of decline of the quasar luminosity function (QLF; $\Phi$) with redshift, $\Phi\propto10^{k(z-6)}$, $k=-0.72$, consistent with Jiang et al. (2016), and a further steeper rate of decline, $k=-0.92$; we use better models of the contaminating populations (MLT dwarfs and compact early-type galaxies); and we use an improved Bayesian selection method, compared to the colour cuts used for the Red Book calculation, allowing the identification of fainter quasars, down to $J_{AB}\sim23$. Quasars at $z>8$ may be selected from Euclid $OYJH$ photometry alone, but selection over the redshift interval $7<z<8$ is greatly improved by the addition of $z$-band data from, e.g., Pan-STARRS and LSST. We calculate predicted quasar yields for the assumed values of the rate of decline of the QLF beyond $z=6$. For the case that the decline of the QLF accelerates beyond $z=6$, with $k=-0.92$, Euclid should nevertheless find over 100 quasars with $7.0<z<7.5$, and $\sim25$ quasars beyond the current record of $z=7.5$, including $\sim8$ beyond $z=8.0$. The first Euclid quasars at $z>7.5$ should be found in the DR1 data release, expected in 2024. It will be possible to determine the bright-end slope of the QLF, $7<z<8$, $M_{1450}<-25$, using 8m class telescopes to confirm candidates, but follow-up with JWST or E-ELT will be required to measure the faint-end slope. Contamination of the candidate lists is predicted to be modest even at $J_{AB}\sim23$. The precision with which $k$ can be determined over $7<z<8$ depends on the value of $k$, but assuming $k=-0.72$ it can be measured to a 1 sigma uncertainty of 0.07.}, added-at = {2019-08-14T05:01:04.000+0200}, author = {Collaboration, Euclid and Barnett, R. and Warren, S. J. and Mortlock, D. J. and Cuby, J. G. and Conselice, C. and Hewett, P. C. and Willott, C. J. and Auricchio, N. and Balaguera-Antolínez, A. and Baldi, M. and Bardelli, S. and Bellagamba, F. and Bender, R. and Biviano, A. and Bonino, D. and Bozzo, E. and Branchini, E. and Brescia, M. and Brinchmann, J. and Burigana, C. and Camera, S. and Capobianco, V. and Carbone, C. and Carretero, J. and Carvalho, C. S. and Castander, F. J. and Castellano, M. and Cavuoti, S. and Cimatti, A. and Clédassou, R. and Congedo, G. and Conversi, L. and Copin, Y. and Corcione, L. and Coupon, J. and Courtois, H. M. and Cropper, M. and Da Silva, A. and Duncan, C. A. J. and Dusini, S. and Ealet, A. and Farrens, S. and Fosalba, P. and Fotopoulou, S. and Fourmanoit, N. and Frailis, M. and Fumana, M. and Galeotta, S. and Garilli, B. and Gillard, W. and Gillis, B. R. and Graciá-Carpio, J. and Grupp, F. and Hoekstra, H. and Hormuth, F. and Israel, H. and Jahnke, K. and Kermiche, S. and Kilbinger, M. and Kirkpatrick, C. C. and Kitching, T. and Kohley, R. and Kubik, B. and Kunz, M. and Kurki-Suonio, H. and Laureijs, R. and Ligori, S. and Lilje, P. B. and Lloro, I. and Maiorano, E. and Mansutti, O. and Marggraf, O. and Martinet, N. and Marulli, F. and Massey, R. and Mauri, N. and Medinaceli, E. and Mei, S. and Mellier, Y. and Metcalf, R. B. and Metge, J. J. and Meylan, G. and Moresco, M. and Moscardini, L. and Munari, E. and Neissner, C. and Niemi, S. M. and Nutma, T. and Padilla, C. and Paltani, S. and Pasian, F. and Paykari, P. and Percival, W. J. and Pettorino, V. and Polenta, G. and Poncet, M. and Pozzetti, L. and Raison, F. and Renzi, A. and Rhodes, J. and Rix, H. W. and Romelli, E. and Roncarelli, M. and Rossetti, E. and Saglia, R. and Sapone, D. and Scaramella, R. and Schneider, P. and Scottez, V. and Secroun, A. and Serrano, S. and Sirri, G. and Stanco, L. and Sureau, F. and Tallada-Crespí, P. and Tavagnacco, D. and Taylor, A. N. and Tenti, M. and Tereno, I. and Toledo-Moreo, R. and Torradeflot, F. and Valenziano, L. and Vassallo, T. and Wang, Y. and Zacchei, A. and Zamorani, G. and Zoubian, J. and Zucca, E.}, biburl = {https://www.bibsonomy.org/bibtex/28df758a10b307ec0ed3b5a5d0db4a655/gpkulkarni}, description = {Euclid preparation: V. Predicted yield of redshift 7<z<9 quasars from the wide survey}, interhash = {75b4c29ec6178c230a4618fb31f8a8c4}, intrahash = {8df758a10b307ec0ed3b5a5d0db4a655}, keywords = {library}, note = {cite arxiv:1908.04310Comment: Submitted to A&A. This paper has been internally reviewed by the Euclid Consortium}, timestamp = {2019-08-14T05:01:04.000+0200}, title = {Euclid preparation: V. Predicted yield of redshift 7<z<9 quasars from the wide survey}, url = {http://arxiv.org/abs/1908.04310}, year = 2019 }