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Euclid Quick Data Release (Q1). Spectroscopic unveiling of highly ionised lines at z = 2.48-3.88

Euclid Collaboration D. Vergani S. Quai F. Ricci Y. Fu S. Serjeant +495 lainnya
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This study explores a rare population of sources in a currently uncharted region of spectroscopic redshift space in the Euclid Quick Data Release (Q1), and is intended potentially to support upcoming spectroscopic studies. Our goal is to identify and investigate a population of sources characterised by highly ionised emission lines in their spectra, which are indicative of active galactic nucleus activity, extreme shock phenomena, or Wolf--Rayet stars. A comprehensive visual inspection of spectra is conducted to ensure the reliability of the sample, focusing on the simultaneous detection of both NeV and OII emission-line measurements, a condition that restricts the Euclid spectroscopic redshift range to z=2.48--3.88. To characterise this population, we analysed the morpho-spectrophotometric properties of their host galaxies. This allowed for a direct comparison with control sources that exhibit similar OII properties and spectroscopic redshifts, but not NeV lines. We identify sources solely based on spectroscopic criteria in the redshift range beyond the Halpha regime. Encompassing 65 potential NeV candidates, the resulting sample delivers the first systematic probe of these NeV candidate emitters at high redshift. We found a good agreement, within 1$\sigma$, between the spectral measurements calculated using both direct integration and Gaussian fitting methodologies. The NeV candidates exhibit colours similar to bright QSOs, with only a few in the tail of very red quasars. We observed a higher stellar mass content, a lower continuum around the 4000A break, and a similar S\'{e}rsic index distribution compared to the control sample. This unique sample paves the way for a wide range of scientific investigations, which will be pursued in the forthcoming data releases.

Topik & Kata Kunci

Physics

Penulis (500)

E

Euclid Collaboration D. Vergani

S

S. Quai

F

F. Ricci

Y

Y. Fu

S

S. Serjeant

M

M. Salvato

W

W. Roster

M

M. Mezcua

M

M. Siudek

A

A. Enia

G

G. Zamorani

L

L. Bisigello

A

A. Feltre

S

S. Fotopoulou

T

T. M. Zatarain

L

L. Pozzetti

D

D. Scott

B

B. Laloux

J

J. Sorce

P

P. Cunha

A

A. Viitanen

C

C. Saulder

E

E. Rossetti

M

M. Moresco

V

V. Brun

E

E. Palazzi

M

M. Talia

Z

Z. Mao

L

L. Nicastro

E

E. Maiorano

D

D. Vibert

P

P. Chabaud

G

G. Daste

F

F. Dufresne

T

T. Bedrine

A

A. Amara

S

S. Andreon

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N. Auricchio

C

C. Baccigalupi

M

M. Baldi

A

A. Balestra

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S. Bardelli

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P. Battaglia

A

A. Biviano

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E. Branchini

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M. Brescia

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S. Camera

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G. Cañas-Herrera

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V. Capobianco

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C. Carbone

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S. Casas

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C. Conselice

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F. Courbin

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H. Courtois

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H. Dole

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T

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A

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J

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F

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S. Sacquegna

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G. Verza

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P. Vielzeuf

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N. A. W. I. D. A. E. S. Bologna

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V. G. 933

4

40129 Bologna

I

Italy

D

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V

V. G. 932

D

D. Mathematics

P

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R

Roma Tre University

8

84 viadellaVascaNavale

0

00133 Rome

I

Inafiasf Roma

3

33 viaFrascati

0

00078 Monte Porzio Catone

L

L. Observatory

L

Leiden University

5

55 Einsteinweg

2

2333 CC Leiden

T

The Netherlands.

K

K. Institute

U

U. Groningen

P

PO Box 800

9

9700 AV Groningen

S

School of Physical Sciences

T

T. O. University

M

Milton Keynes

M

MK7 6AA

U

Uk

M

M. F. P. Physics

1

1. Giessenbachstr.

8

85748 Garching

G

Germany

I

Institute of Space Sciences

C

Campus Uab

C

Carrer de Can Magrans

S

Sn

0

08193 Barcelona

S

Spain.

I

I. D. E. D. Catalunya

E

Edifici Rdit

C

C. Upc

0

08860 Castelldefels

B

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I

Instituto de Astrof'isica de Canarias

E

E. Laguna

U

U. L. Laguna

D

Dpto. Astrof'i sica

E

E. Laguna

T

Tenerife

D

D. Astronomia

U

U. Bologna

V

V. G. 932

I

Inaf - Padova

5

5. Viadell'Osservatorio

3

35131 Padova

I

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5

5. LargoE.Fermi

5

50125

F

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S

S. O. Physics

H

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U

U. Bristol

T

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B

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U. Columbia

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80131 Napoli

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U. Lille

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Cnrs

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Centrale Lille

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U. 9. CRIStAL

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59000 Lille

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France

U

Universit'e Paris-Saclay

I

I. D. Spatiale

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91405

O

Orsay

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H. I. O. Physics

2

2. GustafHallstrominkatu

U

U. Helsinki

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0. Helsinki

F

Finland.

D

D. O. Astronomy

U

U. Geneva

1

16 ch.d'Ecogia

1

1290 Versoix

S

Switzerland.

U

Universitatssternwarte Munchen

F

F. Physik

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Ludwig-Maximilians-Universitat Munchen

1

1. Scheinerstr.

8

8. Munchen

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A. Universit'e

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Cnes

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M

Marseille

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S. O. Mathematics

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U. Surrey

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GU2 7XH

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28 ViaBrera

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20133 Milano

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Ifpu

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Institute for Fundamental Physics of the Universe

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2. viaBeirut

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34127 Trieste

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34127 Trieste

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Infn

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Sezione di Trieste

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2. ViaValerio

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TS 34127Trieste

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I

International School for Advanced Studies

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Via Bonomea 265

T

TS 34136Trieste

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I. Bologna

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62 vialeBertiPichat

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40129 Bologna

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D. Fisica

U

U. Genova

3

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1

16146

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Genova

I

I. Genova

D

Department of PhysicsE. Pancini

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U. Federico

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6. ViaCinthia

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80126

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Napoli

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U. Torino

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1. ViaP.Giuria

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10125 Torino

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I. Torino

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I. Torino

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12 ViaAlfonsoCorti

2

20133 Milano

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Centro de Investigaciones Energ'eticas

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Medioambientales y Tecnol'ogicas

4

40 AvenidaComplutense

2

28014 Madrid

P

Port d'Informaci'o Cient'ifica

C

C. Sn

0

08193 Bellaterra

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I. F. Physics

C

Cosmology

R

Rwth Aachen University

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52056 Aachen

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V. DeutschesZentrumfurLuft-undRaumfahrte.

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Linder Hohe

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50937 Koln

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I. Naples

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Institute for Astronomy

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U. Hawaii

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Honolulu

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HI 96822

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Usa

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U. Edinburgh

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R. Observatory

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B. Hill

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J. B. C. F. Astrophysics

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U. Manchester

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European Space AgencyESRIN

Format Sitasi

APA MLA BibTeX
Vergani, E.C.D., Quai, S., Ricci, F., Fu, Y., Serjeant, S., Salvato, M. et al. (2025). Euclid Quick Data Release (Q1). Spectroscopic unveiling of highly ionised lines at z = 2.48-3.88. https://www.semanticscholar.org/paper/763c18556658a9ce9c7a0b1ed9995ba2d97698f0

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