Euclid preparation. V. Predicted yield of redshift 7 < z < 9 quasars from the wide survey

Euclid Collaboration; R. Barnett; S. J. Warren; D. J. Mortlock; J. -G. Cuby; C. Conselice; P. C. Hewett; C. J. Willott; N. Auricchio; A. Balaguera-Antolínez; M. Baldi; S. Bardelli; F. Bellagamba; R. Bender; A. Biviano; D. Bonino; E. Bozzo; E. Branchini; M. Brescia; J. Brinchmann; C. Burigana; S. Camera; V. Capobianco; C. Carbone; J. Carretero; C. S. Carvalho; F. J. Castander; M. Castellano; S. Cavuoti; A. Cimatti; R. Clédassou; G. Congedo; L. Conversi; Y. Copin; L. Corcione; J. Coupon; H. M. Courtois; M. Cropper; A. Da Silva; C. A. J. Duncan; S. Dusini; A. Ealet; S. Farrens; P. Fosalba; S. Fotopoulou; N. Fourmanoit; M. Frailis; M. Fumana; S. Galeotta; B. Garilli; W. Gillard; B. R. Gillis; J. Graciá-Carpio; F. Grupp; H. Hoekstra; F. Hormuth; H. Israel; K. Jahnke; S. Kermiche; M. Kilbinger; C. C. Kirkpatrick; T. Kitching; R. Kohley; B. Kubik; M. Kunz; H. Kurki-Suonio; R. Laureijs; S. Ligori; P. B. Lilje; I. Lloro; E. Maiorano; O. Mansutti; O. Marggraf; N. Martinet; F. Marulli; R. Massey; N. Mauri; E. Medinaceli; S. Mei; Y. Mellier; R. B. Metcalf; J. J. Metge; G. Meylan; M. Moresco; L. Moscardini; E. Munari; C. Neissner; S. M. Niemi; T. Nutma; C. Padilla; S. Paltani; F. Pasian; P. Paykari; W. J. Percival; V. Pettorino; G. Polenta; M. Poncet; L. Pozzetti; F. Raison; A. Renzi; J. Rhodes; H. -W. Rix; E. Romelli; M. Roncarelli; E. Rossetti; R. Saglia; D. Sapone; R. Scaramella; P. Schneider; V. Scottez; A. Secroun; S. Serrano; G. Sirri; L. Stanco; F. Sureau; P. Tallada-Crespí; D. Tavagnacco; A. N. Taylor; M. Tenti; I. Tereno; R. Toledo-Moreo; F. Torradeflot; L. Valenziano; T. Vassallo; Y. Wang; A. Zacchei; G. Zamorani; J. Zoubian; E. Zucca

doi:10.1051/0004-6361/201936427

Euclid preparation. V. Predicted yield of redshift 7 < z < 9 quasars from the wide survey

Euclid Collaboration, R. Barnett, S. J. Warren, D. J. Mortlock, J. -G. Cuby, C. Conselice, P. C. Hewett, C. J. Willott, N. Auricchio, A. Balaguera-Antolínez, M. Baldi, S. Bardelli, F. Bellagamba, R. Bender, A. Biviano, D. Bonino, E. Bozzo, E. Branchini, M. Brescia, J. BrinchmannC. Burigana, S. Camera, V. Capobianco, C. Carbone, J. Carretero, C. S. Carvalho, F. J. Castander, M. Castellano, S. Cavuoti, A. Cimatti, R. Clédassou, G. Congedo, L. Conversi, Y. Copin, L. Corcione, J. Coupon, H. M. Courtois, M. Cropper, A. Da Silva, C. A. J. Duncan, S. Dusini, A. Ealet, S. Farrens, P. Fosalba, S. Fotopoulou, N. Fourmanoit, M. Frailis, M. Fumana, S. Galeotta, B. Garilli, W. Gillard, B. R. Gillis, J. Graciá-Carpio, F. Grupp, H. Hoekstra, F. Hormuth, H. Israel, K. Jahnke, S. Kermiche, M. Kilbinger, C. C. Kirkpatrick, T. Kitching, R. Kohley, B. Kubik, M. Kunz, H. Kurki-Suonio, R. Laureijs, S. Ligori, P. B. Lilje, I. Lloro, E. Maiorano, O. Mansutti, O. Marggraf, N. Martinet, F. Marulli, R. Massey, N. Mauri, E. Medinaceli, S. Mei, Y. Mellier, R. B. Metcalf, J. J. Metge, G. Meylan, M. Moresco, L. Moscardini, E. Munari, C. Neissner, S. M. Niemi, T. Nutma, C. Padilla, S. Paltani, F. Pasian, P. Paykari, W. J. Percival, V. Pettorino, G. Polenta, M. Poncet, L. Pozzetti, F. Raison, A. Renzi, J. Rhodes, H. -W. Rix, E. Romelli, M. Roncarelli, E. Rossetti, R. Saglia, D. Sapone, R. Scaramella, P. Schneider, V. Scottez, A. Secroun, S. Serrano, G. Sirri, L. Stanco, F. Sureau, P. Tallada-Crespí, D. Tavagnacco, A. N. Taylor, M. Tenti, I. Tereno, R. Toledo-Moreo, F. Torradeflot, L. Valenziano, T. Vassallo, Y. Wang, A. Zacchei, G. Zamorani, J. Zoubian, E. Zucca

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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 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; Φ) with redshift, Φ ∝ 10^{k(z - 6)}, k = -0.72, 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 make use of 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 ∼ 23. 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. If 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 ∼25 quasars beyond the current record of z = 7.5, including ∼8 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, M₁₄₅₀ < -25, using 8 m 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 ∼ 23. 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 1σ uncertainty of 0.07....

Original language	English
Journal	Astronomy and Astrophysics
DOIs	https://doi.org/10.1051/0004-6361/201936427
Publication status	Published - Nov 2019

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Collaboration, E., Barnett, R., Warren, S. J., Mortlock, D. J., Cuby, J. -G., Conselice, C., Hewett, P. C., Willott, C. J., Auricchio, N., Balaguera-Antolínez, A., Baldi, M., Bardelli, S., Bellagamba, F., Bender, R., Biviano, A., Bonino, D., Bozzo, E., Branchini, E., Brescia, M., ... Zucca, E. (2019). Euclid preparation. V. Predicted yield of redshift 7 < z < 9 quasars from the wide survey. Astronomy and Astrophysics. https://doi.org/10.1051/0004-6361/201936427

@article{0620b2600f0547faab72c5b05e7a7094,

title = "Euclid preparation. V. Predicted yield of redshift 7 < z < 9 quasars from the wide survey",

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 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; Φ) with redshift, Φ ∝ 10k(z - 6), k = -0.72, 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 make use of an improved Bayesian selection method, compared to the colour cuts used for the Red Book calculation, allowing the identification of fainter quasars, down to JAB ∼ 23. 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. If 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 ∼25 quasars beyond the current record of z = 7.5, including ∼8 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, M1450 < -25, using 8 m 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 JAB ∼ 23. 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 1σ uncertainty of 0.07....",

author = "Euclid Collaboration and R. Barnett and Warren, {S. J.} and Mortlock, {D. J.} and Cuby, {J. -G.} and C. Conselice and Hewett, {P. C.} and Willott, {C. J.} and N. Auricchio and A. Balaguera-Antol{\'i}nez and M. Baldi and S. Bardelli and F. Bellagamba and R. Bender and A. Biviano and D. Bonino and E. Bozzo and E. Branchini and M. Brescia and J. Brinchmann and C. Burigana and S. Camera and V. Capobianco and C. Carbone and J. Carretero and Carvalho, {C. S.} and Castander, {F. J.} and M. Castellano and S. Cavuoti and A. Cimatti and R. Cl{\'e}dassou and G. Congedo and L. Conversi and Y. Copin and L. Corcione and J. Coupon and Courtois, {H. M.} and M. Cropper and {Da Silva}, A. and Duncan, {C. A. J.} and S. Dusini and A. Ealet and S. Farrens and P. Fosalba and S. Fotopoulou and N. Fourmanoit and M. Frailis and M. Fumana and S. Galeotta and B. Garilli and W. Gillard and Gillis, {B. R.} and J. Graci{\'a}-Carpio and F. Grupp and H. Hoekstra and F. Hormuth and H. Israel and K. Jahnke and S. Kermiche and M. Kilbinger and Kirkpatrick, {C. C.} and T. Kitching and R. Kohley and B. Kubik and M. Kunz and H. Kurki-Suonio and R. Laureijs and S. Ligori and Lilje, {P. B.} and I. Lloro and E. Maiorano and O. Mansutti and O. Marggraf and N. Martinet and F. Marulli and R. Massey and N. Mauri and E. Medinaceli and S. Mei and Y. Mellier and Metcalf, {R. B.} and Metge, {J. J.} and G. Meylan and M. Moresco and L. Moscardini and E. Munari and C. Neissner and Niemi, {S. M.} and T. Nutma and C. Padilla and S. Paltani and F. Pasian and P. Paykari and Percival, {W. J.} and V. Pettorino and G. Polenta and M. Poncet and L. Pozzetti and F. Raison and A. Renzi and J. Rhodes and Rix, {H. -W.} and E. Romelli and M. Roncarelli and E. Rossetti and R. Saglia and D. Sapone and R. Scaramella and P. Schneider and V. Scottez and A. Secroun and S. Serrano and G. Sirri and L. Stanco and F. Sureau and P. Tallada-Cresp{\'i} and D. Tavagnacco and Taylor, {A. N.} and M. Tenti and I. Tereno and R. Toledo-Moreo and F. Torradeflot and L. Valenziano and T. Vassallo and Y. Wang and A. Zacchei and G. Zamorani and J. Zoubian and E. Zucca",

year = "2019",

month = nov,

doi = "10.1051/0004-6361/201936427",

language = "English",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Collaboration, E, Barnett, R, Warren, SJ, Mortlock, DJ, Cuby, J-G, Conselice, C, Hewett, PC, Willott, CJ, Auricchio, N, Balaguera-Antolínez, A, Baldi, M, Bardelli, S, Bellagamba, F, Bender, R, Biviano, A, Bonino, D, Bozzo, E, Branchini, E, Brescia, M, Brinchmann, J, Burigana, C, Camera, S, Capobianco, V, Carbone, C, Carretero, J, Carvalho, CS, Castander, FJ, Castellano, M, Cavuoti, S, Cimatti, A, Clédassou, R, Congedo, G, Conversi, L, Copin, Y, Corcione, L, Coupon, J, Courtois, HM, Cropper, M, Da Silva, A, Duncan, CAJ, Dusini, S, Ealet, A, Farrens, S, Fosalba, P, Fotopoulou, S, Fourmanoit, N, Frailis, M, Fumana, M, Galeotta, S, Garilli, B, Gillard, W, Gillis, BR, Graciá-Carpio, J, Grupp, F, Hoekstra, H, Hormuth, F, Israel, H, Jahnke, K, Kermiche, S, Kilbinger, M, Kirkpatrick, CC, Kitching, T, Kohley, R, Kubik, B, Kunz, M, Kurki-Suonio, H, Laureijs, R, Ligori, S, Lilje, PB, Lloro, I, Maiorano, E, Mansutti, O, Marggraf, O, Martinet, N, Marulli, F, Massey, R, Mauri, N, Medinaceli, E, Mei, S, Mellier, Y, Metcalf, RB, Metge, JJ, Meylan, G, Moresco, M, Moscardini, L, Munari, E, Neissner, C, Niemi, SM, Nutma, T, Padilla, C, Paltani, S, Pasian, F, Paykari, P, Percival, WJ, Pettorino, V, Polenta, G, Poncet, M, Pozzetti, L, Raison, F, Renzi, A, Rhodes, J, Rix, H-W, Romelli, E, Roncarelli, M, Rossetti, E, Saglia, R, Sapone, D, Scaramella, R, Schneider, P, Scottez, V, Secroun, A, Serrano, S, Sirri, G, Stanco, L, Sureau, F, Tallada-Crespí, P, Tavagnacco, D, Taylor, AN, Tenti, M, Tereno, I, Toledo-Moreo, R, Torradeflot, F, Valenziano, L, Vassallo, T, Wang, Y, Zacchei, A, Zamorani, G, Zoubian, J & Zucca, E 2019, 'Euclid preparation. V. Predicted yield of redshift 7 < z < 9 quasars from the wide survey', Astronomy and Astrophysics. https://doi.org/10.1051/0004-6361/201936427

TY - JOUR

T1 - Euclid preparation. V. Predicted yield of redshift 7 < z < 9 quasars from the wide survey

AU - Collaboration, Euclid

AU - Barnett, R.

AU - Warren, S. J.

AU - Mortlock, D. J.

AU - Cuby, J. -G.

AU - Conselice, C.

AU - Hewett, P. C.

AU - Willott, C. J.

AU - Auricchio, N.

AU - Balaguera-Antolínez, A.

AU - Baldi, M.

AU - Bardelli, S.

AU - Bellagamba, F.

AU - Bender, R.

AU - Biviano, A.

AU - Bonino, D.

AU - Bozzo, E.

AU - Branchini, E.

AU - Brescia, M.

AU - Brinchmann, J.

AU - Burigana, C.

AU - Camera, S.

AU - Capobianco, V.

AU - Carbone, C.

AU - Carretero, J.

AU - Carvalho, C. S.

AU - Castander, F. J.

AU - Castellano, M.

AU - Cavuoti, S.

AU - Cimatti, A.

AU - Clédassou, R.

AU - Congedo, G.

AU - Conversi, L.

AU - Copin, Y.

AU - Corcione, L.

AU - Coupon, J.

AU - Courtois, H. M.

AU - Cropper, M.

AU - Da Silva, A.

AU - Duncan, C. A. J.

AU - Dusini, S.

AU - Ealet, A.

AU - Farrens, S.

AU - Fosalba, P.

AU - Fotopoulou, S.

AU - Fourmanoit, N.

AU - Frailis, M.

AU - Fumana, M.

AU - Galeotta, S.

AU - Garilli, B.

AU - Gillard, W.

AU - Gillis, B. R.

AU - Graciá-Carpio, J.

AU - Grupp, F.

AU - Hoekstra, H.

AU - Hormuth, F.

AU - Israel, H.

AU - Jahnke, K.

AU - Kermiche, S.

AU - Kilbinger, M.

AU - Kirkpatrick, C. C.

AU - Kitching, T.

AU - Kohley, R.

AU - Kubik, B.

AU - Kunz, M.

AU - Kurki-Suonio, H.

AU - Laureijs, R.

AU - Ligori, S.

AU - Lilje, P. B.

AU - Lloro, I.

AU - Maiorano, E.

AU - Mansutti, O.

AU - Marggraf, O.

AU - Martinet, N.

AU - Marulli, F.

AU - Massey, R.

AU - Mauri, N.

AU - Medinaceli, E.

AU - Mei, S.

AU - Mellier, Y.

AU - Metcalf, R. B.

AU - Metge, J. J.

AU - Meylan, G.

AU - Moresco, M.

AU - Moscardini, L.

AU - Munari, E.

AU - Neissner, C.

AU - Niemi, S. M.

AU - Nutma, T.

AU - Padilla, C.

AU - Paltani, S.

AU - Pasian, F.

AU - Paykari, P.

AU - Percival, W. J.

AU - Pettorino, V.

AU - Polenta, G.

AU - Poncet, M.

AU - Pozzetti, L.

AU - Raison, F.

AU - Renzi, A.

AU - Rhodes, J.

AU - Rix, H. -W.

AU - Romelli, E.

AU - Roncarelli, M.

AU - Rossetti, E.

AU - Saglia, R.

AU - Sapone, D.

AU - Scaramella, R.

AU - Schneider, P.

AU - Scottez, V.

AU - Secroun, A.

AU - Serrano, S.

AU - Sirri, G.

AU - Stanco, L.

AU - Sureau, F.

AU - Tallada-Crespí, P.

AU - Tavagnacco, D.

AU - Taylor, A. N.

AU - Tenti, M.

AU - Tereno, I.

AU - Toledo-Moreo, R.

AU - Torradeflot, F.

AU - Valenziano, L.

AU - Vassallo, T.

AU - Wang, Y.

AU - Zacchei, A.

AU - Zamorani, G.

AU - Zoubian, J.

AU - Zucca, E.

PY - 2019/11

Y1 - 2019/11

N2 - 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 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; Φ) with redshift, Φ ∝ 10k(z - 6), k = -0.72, 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 make use of an improved Bayesian selection method, compared to the colour cuts used for the Red Book calculation, allowing the identification of fainter quasars, down to JAB ∼ 23. 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. If 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 ∼25 quasars beyond the current record of z = 7.5, including ∼8 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, M1450 < -25, using 8 m 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 JAB ∼ 23. 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 1σ uncertainty of 0.07....

AB - 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 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; Φ) with redshift, Φ ∝ 10k(z - 6), k = -0.72, 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 make use of an improved Bayesian selection method, compared to the colour cuts used for the Red Book calculation, allowing the identification of fainter quasars, down to JAB ∼ 23. 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. If 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 ∼25 quasars beyond the current record of z = 7.5, including ∼8 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, M1450 < -25, using 8 m 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 JAB ∼ 23. 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 1σ uncertainty of 0.07....

U2 - 10.1051/0004-6361/201936427

DO - 10.1051/0004-6361/201936427

M3 - Article (Academic Journal)

SN - 0004-6361

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

ER -

Euclid preparation. V. Predicted yield of redshift 7 < z < 9 quasars from the wide survey

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