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Euclid: Early Release Observations – NISP-only sources and the search for luminous z = 6–8 galaxies

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Euclid: Early Release Observations – NISP-only sources and the search for luminous z = 6–8 galaxies. / Euclid Collaboration.
In: Astronomy and Astrophysics, Vol. 697, A16, 31.05.2025.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Euclid Collaboration 2025, 'Euclid: Early Release Observations – NISP-only sources and the search for luminous z = 6–8 galaxies', Astronomy and Astrophysics, vol. 697, A16. https://doi.org/10.1051/0004-6361/202450794

APA

Euclid Collaboration (2025). Euclid: Early Release Observations – NISP-only sources and the search for luminous z = 6–8 galaxies. Astronomy and Astrophysics, 697, Article A16. https://doi.org/10.1051/0004-6361/202450794

Vancouver

Euclid Collaboration. Euclid: Early Release Observations – NISP-only sources and the search for luminous z = 6–8 galaxies. Astronomy and Astrophysics. 2025 May 31;697:A16. Epub 2025 Apr 30. doi: 10.1051/0004-6361/202450794

Author

Euclid Collaboration. / Euclid: Early Release Observations – NISP-only sources and the search for luminous z = 6–8 galaxies. In: Astronomy and Astrophysics. 2025 ; Vol. 697.

Bibtex

@article{73104f26f5364f2c8763a9dfe39b49d9,
title = "Euclid: Early Release Observations – NISP-only sources and the search for luminous z = 6–8 galaxies",
abstract = "This paper presents a search for high redshift galaxies from the Euclid Early Release Observations program {\textquoteleft}Magnifying Lens.{\textquoteright} The 1.5 deg2 area covered by the twin Abell lensing cluster fields is comparable in size to the few other deep near-infrared surveys such as COSMOS, and so provides an opportunity to significantly increase known samples of rare UV-bright galaxies at z ≈ 6–8 (MUV ≲ −22). Beyond their still uncertain role in reionisation, these UV-bright galaxies are ideal laboratories from which to study galaxy formation and constrain the bright-end of the UV luminosity function. Of the 501 994 sources detected from a combined YE, JE, and HE NISP detection image, 168 do not have any appreciable VIS/IE flux. These objects span a range in spectral colours, separated into two classes: 139 extremely red sources; and 29 Lyman-break galaxy candidates. Best-fit redshifts and spectral templates suggest the former is composed of both z ≳ 5 dusty star-forming galaxies and z ≈ 1–3 quiescent systems. The latter is composed of more homogeneous Lyman-break galaxies at z ≈ 6–8. In both cases, contamination by L- and T-type dwarfs cannot be ruled out with Euclid images alone. Additional contamination from instrumental persistence is investigated using a novel time series analysis. This work lays the foundation for future searches within the Euclid Deep Fields, where thousands more z ≳ 6 Lyman-break systems and extremely red sources will be identified.",
author = "{Euclid Collaboration} and J.R. Weaver and S. Taamoli and C.J.R. McPartland and L. Zalesky and N. Allen and S. Toft and D.B. Sanders and H. Atek and R.A.A. Bowler and D. Stern and C.J. Conselice and B. Mobasher and I. Szapudi and P.R.M. Eisenhardt and G. Murphree and I. Valdes and K. Ito and S. Belladitta and P.A. Oesch and S. Serjeant and D.J. Mortlock and N.A. Hatch and M. Kluge and B. Milvang-Jensen and G. Rodighiero and E. Ba{\~n}ados and J.M. Diego and R. Gavazzi and G. Congedo and M. Shuntov and H. Dole and P.-F. Rocci and T. Saifollahi and M. Miluzio and M. Ezziati and A.C.N. Hughes and J.-C. Cuillandre and R. Laureijs and S. Paltani and M. Schirmer and C. Stone and N. Aghanim and B. Altieri and A. Amara and S. Andreon and I. Hook and A.N. Taylor and Y. Wang and J. Weller and D. Scott",
year = "2025",
month = may,
day = "31",
doi = "10.1051/0004-6361/202450794",
language = "English",
volume = "697",
journal = "Astronomy and Astrophysics",
issn = "1432-0746",
publisher = "EDP Sciences",

}

RIS

TY - JOUR

T1 - Euclid: Early Release Observations – NISP-only sources and the search for luminous z = 6–8 galaxies

AU - Euclid Collaboration

AU - Weaver, J.R.

AU - Taamoli, S.

AU - McPartland, C.J.R.

AU - Zalesky, L.

AU - Allen, N.

AU - Toft, S.

AU - Sanders, D.B.

AU - Atek, H.

AU - Bowler, R.A.A.

AU - Stern, D.

AU - Conselice, C.J.

AU - Mobasher, B.

AU - Szapudi, I.

AU - Eisenhardt, P.R.M.

AU - Murphree, G.

AU - Valdes, I.

AU - Ito, K.

AU - Belladitta, S.

AU - Oesch, P.A.

AU - Serjeant, S.

AU - Mortlock, D.J.

AU - Hatch, N.A.

AU - Kluge, M.

AU - Milvang-Jensen, B.

AU - Rodighiero, G.

AU - Bañados, E.

AU - Diego, J.M.

AU - Gavazzi, R.

AU - Congedo, G.

AU - Shuntov, M.

AU - Dole, H.

AU - Rocci, P.-F.

AU - Saifollahi, T.

AU - Miluzio, M.

AU - Ezziati, M.

AU - Hughes, A.C.N.

AU - Cuillandre, J.-C.

AU - Laureijs, R.

AU - Paltani, S.

AU - Schirmer, M.

AU - Stone, C.

AU - Aghanim, N.

AU - Altieri, B.

AU - Amara, A.

AU - Andreon, S.

AU - Hook, I.

AU - Taylor, A.N.

AU - Wang, Y.

AU - Weller, J.

AU - Scott, D.

PY - 2025/5/31

Y1 - 2025/5/31

N2 - This paper presents a search for high redshift galaxies from the Euclid Early Release Observations program ‘Magnifying Lens.’ The 1.5 deg2 area covered by the twin Abell lensing cluster fields is comparable in size to the few other deep near-infrared surveys such as COSMOS, and so provides an opportunity to significantly increase known samples of rare UV-bright galaxies at z ≈ 6–8 (MUV ≲ −22). Beyond their still uncertain role in reionisation, these UV-bright galaxies are ideal laboratories from which to study galaxy formation and constrain the bright-end of the UV luminosity function. Of the 501 994 sources detected from a combined YE, JE, and HE NISP detection image, 168 do not have any appreciable VIS/IE flux. These objects span a range in spectral colours, separated into two classes: 139 extremely red sources; and 29 Lyman-break galaxy candidates. Best-fit redshifts and spectral templates suggest the former is composed of both z ≳ 5 dusty star-forming galaxies and z ≈ 1–3 quiescent systems. The latter is composed of more homogeneous Lyman-break galaxies at z ≈ 6–8. In both cases, contamination by L- and T-type dwarfs cannot be ruled out with Euclid images alone. Additional contamination from instrumental persistence is investigated using a novel time series analysis. This work lays the foundation for future searches within the Euclid Deep Fields, where thousands more z ≳ 6 Lyman-break systems and extremely red sources will be identified.

AB - This paper presents a search for high redshift galaxies from the Euclid Early Release Observations program ‘Magnifying Lens.’ The 1.5 deg2 area covered by the twin Abell lensing cluster fields is comparable in size to the few other deep near-infrared surveys such as COSMOS, and so provides an opportunity to significantly increase known samples of rare UV-bright galaxies at z ≈ 6–8 (MUV ≲ −22). Beyond their still uncertain role in reionisation, these UV-bright galaxies are ideal laboratories from which to study galaxy formation and constrain the bright-end of the UV luminosity function. Of the 501 994 sources detected from a combined YE, JE, and HE NISP detection image, 168 do not have any appreciable VIS/IE flux. These objects span a range in spectral colours, separated into two classes: 139 extremely red sources; and 29 Lyman-break galaxy candidates. Best-fit redshifts and spectral templates suggest the former is composed of both z ≳ 5 dusty star-forming galaxies and z ≈ 1–3 quiescent systems. The latter is composed of more homogeneous Lyman-break galaxies at z ≈ 6–8. In both cases, contamination by L- and T-type dwarfs cannot be ruled out with Euclid images alone. Additional contamination from instrumental persistence is investigated using a novel time series analysis. This work lays the foundation for future searches within the Euclid Deep Fields, where thousands more z ≳ 6 Lyman-break systems and extremely red sources will be identified.

U2 - 10.1051/0004-6361/202450794

DO - 10.1051/0004-6361/202450794

M3 - Journal article

VL - 697

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 1432-0746

M1 - A16

ER -