Euclid: the selection of quiescent and star-forming galaxies using observed colours

Author:

Bisigello L12ORCID,Kuchner U1,Conselice C J1,Andreon S3,Bolzonella M2,Duc P-A4,Garilli B5,Humphrey A6,Maraston C7,Moresco M28ORCID,Pozzetti L2,Tortora C9ORCID,Zamorani G2,Auricchio N2,Brinchmann J6,Capobianco V10,Carretero J11,Castander F J1213,Castellano M14,Cavuoti S151617ORCID,Cimatti A89,Cledassou R18,Congedo G19,Conversi L20,Corcione L10,Cropper M S21,Dusini S22,Frailis M23,Franceschi E2,Franzetti P5,Fumana M5,Hormuth F24,Israel H25,Jahnke K26,Kermiche S27,Kitching T21,Kohley R20,Kubik B28,Kunz M29,Le Fèvre O30,Ligori S10,Lilje P B31,Lloro I1213,Maiorano E2,Marggraf O32,Massey R33ORCID,Masters D C34,Mei S3536,Mellier Y3738,Meylan G39,Padilla C11,Paltani S40,Pasian F23,Pettorino V41,Pires S41,Polenta G42,Poncet M18,Raison F43,Rhodes J34,Roncarelli M28ORCID,Rossetti E8,Saglia R2543,Sauvage M41,Schneider P32,Secroun A27,Serrano S1244,Sureau F41,Taylor A N19,Tereno I4546,Toledo-Moreo R47,Valenziano L248,Wang Y49,Wetzstein M43,Zoubian J27

Affiliation:

1. University of Nottingham, University Park, Nottingham NG7 2RD, UK

2. INAF – Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, Via Piero Gobetti 93/3, I-40129 Bologna, Italy

3. INAF – Osservatorio Astronomico di Brera, Via Brera 28, I-20122 Milano, Italy

4. Observatoire Astronomique de Strasbourg (ObAS), Université de Strasbourg – CNRS, UMR 7550, F-67000 Strasbourg, France

5. INAF-IASF Milano, Via Alfonso Corti 12, I-20133 Milano, Italy

6. Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Rua das Estrelas, P-4150-762 Porto, Portugal

7. Institute of Cosmology and Gravitation, University of Portsmouth, Portsmouth PO1 3FX, UK

8. Dipartimento di Fisica e Astronomia, Universitá di Bologna, Via Gobetti 93/2, I-40129 Bologna, Italy

9. INAF – Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, I-50125 Firenze, Italy

10. INAF – Osservatorio Astrofisico di Torino, Via Osservatorio 20, I-10025 Pino Torinese (TO), Italy

11. Institut de Física d’Altes Energies IFAE, E-08193 Barcelona, Spain

12. Institute of Space Sciences (ICE, CSIC), Campus UAB, Carrer de Can Magrans, s/n, E-08193 Barcelona, Spain

13. Institut d’Estudis Espacials de Catalunya (IEEC), E-08034 Barcelona, Spain

14. INAF – Osservatorio Astronomico di Roma, Via Frascati 33, I-00078 Monteporzio Catone, Italy

15. Department of Physics ‘E. Pancini’, University Federico II, Via Cinthia 6, I-80126 Napoli, Italy

16. INFN Section of Naples, Via Cinthia 6, I-80126 Napoli, Italy

17. INAF – Osservatorio Astronomico di Capodimonte, Via Moiariello 16, I-80131 Napoli, Italy

18. Centre National d’Etudes Spatiales, F-31401 Toulouse, France

19. Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UK

20. ESAC/ESA, Camino Bajo del Castillo, s/n., Urb. Villafranca del Castillo, E-28692 Villanueva de la Cañada, Madrid, Spain

21. Mullard Space Science Laboratory, University College London, Holmbury St Mary, Dorking, Surrey RH5 6NT, UK

22. INFN – Padova, Via Marzolo 8, I-35131 Padova, Italy

23. INAF – Osservatorio Astronomico di Trieste, Via G. B. Tiepolo 11, I-34131 Trieste, Italy

24. von Hoerner & Sulger GmbH, SchloßPlatz 8, D-68723 Schwetzingen, Germany

25. Universitäts-Sternwarte München, Fakultät für Physik, Ludwig-Maximilians-Universität München, Scheinerstrasse 1, D-81679 München, Germany

26. Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany

27. Aix-Marseille Université, CNRS/IN2P3, CPPM, F-13284 Marseille, France

28. Institut de Physique Nucléaire de Lyon, 4, rue Enrico Fermi, F-69622 Villeurbanne cedex, France

29. Université de Genève, Département de Physique Théorique and Centre for Astroparticle Physics, 24 quai Ernest-Ansermet, CH-1211 Genève 4, Switzerland

30. Aix-Marseille Université, CNRS, CNES, LAM, F-13284 Marseille, France

31. Institute of Theoretical Astrophysics, University of Oslo, PO Box 1029 Blindern, N-0315 Oslo, Norway

32. Argelander-Institut für Astronomie, Universität Bonn, Auf dem Hügel 71, D-53121 Bonn, Germany

33. Centre for Extragalactic Astronomy, Department of Physics, Durham University, South Road, Durham DH1 3LE, UK

34. Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA

35. University of Paris Denis Diderot, University of Paris Sorbonne Cité (PSC), F-75205 Paris Cedex 13, France

36. Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, F-75014 Paris, France

37. Institut d’Astrophysique de Paris, 98bis Boulevard Arago, F-75014 Paris, France

38. IRFU, CEA, Université Paris-Saclay F-91191 Gif-sur-Yvette Cedex, France

39. Observatoire de Sauverny, Ecole Polytechnique Fédérale de Lau-sanne, CH-1290 Versoix, Switzerland

40. Department of Astronomy, University of Geneva, ch. d’Écogia 16, CH-1290 Versoix, Switzerland

41. AIM, CEA, CNRS, Université Paris-Saclay, Université Paris Diderot, Sorbonne Paris Cité, F-91191 Gif-sur-Yvette, France

42. Space Science Data Center, Italian Space Agency, via del Politecnico snc, I-00133 Roma, Italy

43. Max Planck Institute for Extraterrestrial Physics, Giessenbachstr. 1, D-85748 Garching, Germany

44. Institute of Space Sciences (IEEC-CSIC), c/Can Magrans s/n, E-08193 Barcelona, Spain

45. Instituto de Astrofísica e Ciências do Espaço, Faculdade de Ciências, Universidade de Lisboa, Tapada da Ajuda, P-1349-018 Lisboa, Portugal

46. Departamento de Física, Faculdade de Ciências, Universidade de Lisboa, Edifício C8, Campo Grande, P-1749-016 Lisboa, Portugal

47. Universidad Politécnica de Cartagena, Departamento de Electrónica y Tecnología de Computadoras, E-30202 Cartagena, Spain

48. Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Via Irnerio 46, I-40126 Bologna, Italy

49. Infrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA 91125, USA

Abstract

ABSTRACT The Euclid mission will observe well over a billion galaxies out to z ∼ 6 and beyond. This will offer an unrivalled opportunity to investigate several key questions for understanding galaxy formation and evolution. The first step for many of these studies will be the selection of a sample of quiescent and star-forming galaxies, as is often done in the literature by using well-known colour techniques such as the ‘UVJ’ diagram. However, given the limited number of filters available for the Euclid telescope, the recovery of such rest-frame colours will be challenging. We therefore investigate the use of observed Euclid colours, on their own and together with ground-based u-band observations, for selecting quiescent and star-forming galaxies. The most efficient colour combination, among the ones tested in this work, consists of the (u − VIS) and (VIS − J) colours. We find that this combination allows users to select a sample of quiescent galaxies complete to above $\sim 70{{\ \rm per\ cent}}$ and with less than 15${{\ \rm per\ cent}}$ contamination at redshifts in the range 0.75 < z < 1. For galaxies at high-z or without the u-band complementary observations, the (VIS − Y) and (J − H) colours represent a valid alternative, with $\gt 65{{\ \rm per\ cent}}$ completeness level and contamination below 20${{\ \rm per\ cent}}$ at 1 < z < 2 for finding quiescent galaxies. In comparison, the sample of quiescent galaxies selected with the traditional UVJ technique is only $\sim 20{{\ \rm per\ cent}}$ complete at z < 3, when recovering the rest-frame colours using mock Euclid observations. This shows that our new methodology is the most suitable one when only Euclid bands, along with u-band imaging, are available.

Funder

Science and Technology Facilities Council

Institut sur la Nutrition et les Aliments Fonctionnels

European Space Agency

Academy of Finland

Agenzia Spaziale Italiana

Federaal Wetenschapsbeleid

Centre National d’Etudes Spatiales

Deutsches Zentrum für Luft- und Raumfahrt

National Aeronautics and Space Administration

Agenția Spațială Română

Staatssekretariat für Bildung, Forschung und Innovation

UK Space Agency

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

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