Euclid: Early Release Observations -- Deep anatomy of nearby galaxies

Euclid Collaboration; L. K. Hunt; F. Annibali; J.-C. Cuillandre; A. M. N. Ferguson; P. Jablonka; S. S. Larsen; F. R. Marleau; E. Schinnerer; M. Schirmer; C. Stone; C. Tortora; T. Saifollahi; A. Lançon; M. Bolzonella; S. Gwyn; M. Kluge; R. Laureijs; D. Carollo; M. L. M. Collins; P. Dimauro; P.-A. Duc; D. Erkal; J. M. Howell; C. Nally; E. Saremi; R. Scaramella; V. Belokurov; C. J. Conselice; J. H. Knapen; A. W. McConnachie; I. McDonald; J. Miro Carretero; J. Roman; M. Sauvage; E. Branchini; H. Hoekstra; K. Kuijken; M. Kunz; S. Mei; P. Schneider; C. Sirignano; A. N. Taylor; E. A. Valentijn; G. Verdoes Kleijn; Y. Wang; J. Weller; O. R. Williams; K. George; P. Simon; A. Mora

doi:10.48550/arXiv.2405.13499

Euclid: Early Release Observations -- Deep anatomy of nearby galaxies

Euclid Collaboration, L. K. Hunt^*, F. Annibali, J.-C. Cuillandre, A. M. N. Ferguson, P. Jablonka, S. S. Larsen, F. R. Marleau, E. Schinnerer, M. Schirmer, C. Stone, C. Tortora, T. Saifollahi, A. Lançon, M. Bolzonella, S. Gwyn, M. Kluge, R. Laureijs, D. Carollo, M. L. M. CollinsP. Dimauro, P.-A. Duc, D. Erkal, J. M. Howell, C. Nally, E. Saremi, R. Scaramella, V. Belokurov, C. J. Conselice, J. H. Knapen, A. W. McConnachie, I. McDonald, J. Miro Carretero, J. Roman, M. Sauvage, E. Branchini, H. Hoekstra, K. Kuijken, M. Kunz, S. Mei, P. Schneider, C. Sirignano, A. N. Taylor, E. A. Valentijn, G. Verdoes Kleijn, Y. Wang, J. Weller, O. R. Williams, K. George, P. Simon, A. Mora

^*Corresponding author for this work

Astronomy

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Abstract

Euclid is poised to make significant advances in the study of nearby galaxies in the local Universe. Here we present a first look at 6 galaxies observed for the Nearby Galaxy Showcase as part of the Euclid Early Release Observations acquired between August and November, 2023. These targets, 3 dwarf galaxies (HolmbergII, IC10, NGC6822) and 3 spirals (IC342, NGC2403, NGC6744), range in distance from about 0.5 Mpc to 8.8 Mpc. Our assessment of the surface brightness depths in the stacked Euclid images confirms previous estimates in 100 arcsec^2 regions of 1sigma=30.5 mag/arcsec^2 for VIS, but slightly deeper than previous estimates for NISP with 1sigma=29.2-29.4 mag/arcsec^2. By combining Euclid HE, YE, and IE into RGB images, we illustrate the large field-of-view covered by a single Reference Observing Sequence, together with exquisite detail on parsec scales in these nearby galaxies. Radial surface brightness and color profiles demonstrate galaxy colors in agreement with stellar population synthesis models. Standard stellar photometry selection techniques find approximately 1.3 million stars across the 6 galaxy fields. Euclid's resolved stellar photometry allows us to constrain the star-formation histories of these galaxies, by disentangling the distributions of young stars, as well as asymptotic giant branch and red giant branch stellar populations. We finally examine 2 galaxies individually for surrounding satellite systems. Our analysis of the ensemble of dwarf satellites around NGC6744 reveals a new galaxy, EDwC1, a nucleated dwarf spheroidal at the end of a spiral arm. Our new census of the globular clusters around NGC2403 yields 9 new star-cluster candidates, 8 of which with colors indicative of evolved stellar populations. In summary, our investigation of the 6 Showcase galaxies demonstrates that Euclid is a powerful probe of the anatomy of nearby galaxies [abridged].

Original language	English
Publisher	arXiv
Number of pages	37
DOIs	https://doi.org/10.48550/arXiv.2405.13499
Publication status	Submitted - 1-May-2024

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Name	ArXiv
Publisher	Cornell University Press
ISSN (Print)	2331-8422

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Astrophysics - Astrophysics of Galaxies

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Euclid: Early Release Observations -- Deep anatomy of nearby galaxiesSubmitted manuscript, 38.7 MBLicence: CC BY

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Euclid Collaboration, Hunt, L. K., Annibali, F., Cuillandre, J.-C., Ferguson, A. M. N., Jablonka, P., Larsen, S. S., Marleau, F. R., Schinnerer, E., Schirmer, M., Stone, C., Tortora, C., Saifollahi, T., Lançon, A., Bolzonella, M., Gwyn, S., Kluge, M., Laureijs, R., Carollo, D., ... Mora, A. (2024). Euclid: Early Release Observations -- Deep anatomy of nearby galaxies. (ArXiv). arXiv. https://doi.org/10.48550/arXiv.2405.13499

@techreport{46c43f7246bb4a3da25a5ae3e4ff2094,

title = "Euclid: Early Release Observations -- Deep anatomy of nearby galaxies",

abstract = "Euclid is poised to make significant advances in the study of nearby galaxies in the local Universe. Here we present a first look at 6 galaxies observed for the Nearby Galaxy Showcase as part of the Euclid Early Release Observations acquired between August and November, 2023. These targets, 3 dwarf galaxies (HolmbergII, IC10, NGC6822) and 3 spirals (IC342, NGC2403, NGC6744), range in distance from about 0.5 Mpc to 8.8 Mpc. Our assessment of the surface brightness depths in the stacked Euclid images confirms previous estimates in 100 arcsec^2 regions of 1sigma=30.5 mag/arcsec^2 for VIS, but slightly deeper than previous estimates for NISP with 1sigma=29.2-29.4 mag/arcsec^2. By combining Euclid HE, YE, and IE into RGB images, we illustrate the large field-of-view covered by a single Reference Observing Sequence, together with exquisite detail on parsec scales in these nearby galaxies. Radial surface brightness and color profiles demonstrate galaxy colors in agreement with stellar population synthesis models. Standard stellar photometry selection techniques find approximately 1.3 million stars across the 6 galaxy fields. Euclid's resolved stellar photometry allows us to constrain the star-formation histories of these galaxies, by disentangling the distributions of young stars, as well as asymptotic giant branch and red giant branch stellar populations. We finally examine 2 galaxies individually for surrounding satellite systems. Our analysis of the ensemble of dwarf satellites around NGC6744 reveals a new galaxy, EDwC1, a nucleated dwarf spheroidal at the end of a spiral arm. Our new census of the globular clusters around NGC2403 yields 9 new star-cluster candidates, 8 of which with colors indicative of evolved stellar populations. In summary, our investigation of the 6 Showcase galaxies demonstrates that Euclid is a powerful probe of the anatomy of nearby galaxies [abridged].",

keywords = "Astrophysics - Astrophysics of Galaxies",

author = "{Euclid Collaboration} and Hunt, {L. K.} and F. Annibali and J.-C. Cuillandre and Ferguson, {A. M. N.} and P. Jablonka and Larsen, {S. S.} and Marleau, {F. R.} and E. Schinnerer and M. Schirmer and C. Stone and C. Tortora and T. Saifollahi and A. Lan{\c c}on and M. Bolzonella and S. Gwyn and M. Kluge and R. Laureijs and D. Carollo and Collins, {M. L. M.} and P. Dimauro and P.-A. Duc and D. Erkal and Howell, {J. M.} and C. Nally and E. Saremi and R. Scaramella and V. Belokurov and Conselice, {C. J.} and Knapen, {J. H.} and McConnachie, {A. W.} and I. McDonald and {Miro Carretero}, J. and J. Roman and M. Sauvage and E. Branchini and H. Hoekstra and K. Kuijken and M. Kunz and S. Mei and P. Schneider and C. Sirignano and Taylor, {A. N.} and Valentijn, {E. A.} and {Verdoes Kleijn}, G. and Y. Wang and J. Weller and Williams, {O. R.} and K. George and P. Simon and A. Mora",

year = "2024",

month = may,

day = "1",

doi = "10.48550/arXiv.2405.13499",

language = "English",

series = "ArXiv",

publisher = "arXiv",

type = "WorkingPaper",

institution = "arXiv",

}

Euclid Collaboration, Hunt, LK, Annibali, F, Cuillandre, J-C, Ferguson, AMN, Jablonka, P, Larsen, SS, Marleau, FR, Schinnerer, E, Schirmer, M, Stone, C, Tortora, C, Saifollahi, T, Lançon, A, Bolzonella, M, Gwyn, S, Kluge, M, Laureijs, R, Carollo, D, Collins, MLM, Dimauro, P, Duc, P-A, Erkal, D, Howell, JM, Nally, C, Saremi, E, Scaramella, R, Belokurov, V, Conselice, CJ, Knapen, JH, McConnachie, AW, McDonald, I, Miro Carretero, J, Roman, J, Sauvage, M, Branchini, E, Hoekstra, H, Kuijken, K, Kunz, M, Mei, S, Schneider, P, Sirignano, C, Taylor, AN, Valentijn, EA , Verdoes Kleijn, G, Wang, Y, Weller, J, Williams, OR, George, K, Simon, P & Mora, A 2024 'Euclid: Early Release Observations -- Deep anatomy of nearby galaxies' ArXiv, arXiv. https://doi.org/10.48550/arXiv.2405.13499

TY - UNPB

T1 - Euclid: Early Release Observations -- Deep anatomy of nearby galaxies

AU - Euclid Collaboration

AU - Hunt, L. K.

AU - Annibali, F.

AU - Cuillandre, J.-C.

AU - Ferguson, A. M. N.

AU - Jablonka, P.

AU - Larsen, S. S.

AU - Marleau, F. R.

AU - Schinnerer, E.

AU - Schirmer, M.

AU - Stone, C.

AU - Tortora, C.

AU - Saifollahi, T.

AU - Lançon, A.

AU - Bolzonella, M.

AU - Gwyn, S.

AU - Kluge, M.

AU - Laureijs, R.

AU - Carollo, D.

AU - Collins, M. L. M.

AU - Dimauro, P.

AU - Duc, P.-A.

AU - Erkal, D.

AU - Howell, J. M.

AU - Nally, C.

AU - Saremi, E.

AU - Scaramella, R.

AU - Belokurov, V.

AU - Conselice, C. J.

AU - Knapen, J. H.

AU - McConnachie, A. W.

AU - McDonald, I.

AU - Miro Carretero, J.

AU - Roman, J.

AU - Sauvage, M.

AU - Branchini, E.

AU - Hoekstra, H.

AU - Kuijken, K.

AU - Kunz, M.

AU - Mei, S.

AU - Schneider, P.

AU - Sirignano, C.

AU - Taylor, A. N.

AU - Valentijn, E. A.

AU - Verdoes Kleijn, G.

AU - Wang, Y.

AU - Weller, J.

AU - Williams, O. R.

AU - George, K.

AU - Simon, P.

AU - Mora, A.

PY - 2024/5/1

Y1 - 2024/5/1

N2 - Euclid is poised to make significant advances in the study of nearby galaxies in the local Universe. Here we present a first look at 6 galaxies observed for the Nearby Galaxy Showcase as part of the Euclid Early Release Observations acquired between August and November, 2023. These targets, 3 dwarf galaxies (HolmbergII, IC10, NGC6822) and 3 spirals (IC342, NGC2403, NGC6744), range in distance from about 0.5 Mpc to 8.8 Mpc. Our assessment of the surface brightness depths in the stacked Euclid images confirms previous estimates in 100 arcsec^2 regions of 1sigma=30.5 mag/arcsec^2 for VIS, but slightly deeper than previous estimates for NISP with 1sigma=29.2-29.4 mag/arcsec^2. By combining Euclid HE, YE, and IE into RGB images, we illustrate the large field-of-view covered by a single Reference Observing Sequence, together with exquisite detail on parsec scales in these nearby galaxies. Radial surface brightness and color profiles demonstrate galaxy colors in agreement with stellar population synthesis models. Standard stellar photometry selection techniques find approximately 1.3 million stars across the 6 galaxy fields. Euclid's resolved stellar photometry allows us to constrain the star-formation histories of these galaxies, by disentangling the distributions of young stars, as well as asymptotic giant branch and red giant branch stellar populations. We finally examine 2 galaxies individually for surrounding satellite systems. Our analysis of the ensemble of dwarf satellites around NGC6744 reveals a new galaxy, EDwC1, a nucleated dwarf spheroidal at the end of a spiral arm. Our new census of the globular clusters around NGC2403 yields 9 new star-cluster candidates, 8 of which with colors indicative of evolved stellar populations. In summary, our investigation of the 6 Showcase galaxies demonstrates that Euclid is a powerful probe of the anatomy of nearby galaxies [abridged].

AB - Euclid is poised to make significant advances in the study of nearby galaxies in the local Universe. Here we present a first look at 6 galaxies observed for the Nearby Galaxy Showcase as part of the Euclid Early Release Observations acquired between August and November, 2023. These targets, 3 dwarf galaxies (HolmbergII, IC10, NGC6822) and 3 spirals (IC342, NGC2403, NGC6744), range in distance from about 0.5 Mpc to 8.8 Mpc. Our assessment of the surface brightness depths in the stacked Euclid images confirms previous estimates in 100 arcsec^2 regions of 1sigma=30.5 mag/arcsec^2 for VIS, but slightly deeper than previous estimates for NISP with 1sigma=29.2-29.4 mag/arcsec^2. By combining Euclid HE, YE, and IE into RGB images, we illustrate the large field-of-view covered by a single Reference Observing Sequence, together with exquisite detail on parsec scales in these nearby galaxies. Radial surface brightness and color profiles demonstrate galaxy colors in agreement with stellar population synthesis models. Standard stellar photometry selection techniques find approximately 1.3 million stars across the 6 galaxy fields. Euclid's resolved stellar photometry allows us to constrain the star-formation histories of these galaxies, by disentangling the distributions of young stars, as well as asymptotic giant branch and red giant branch stellar populations. We finally examine 2 galaxies individually for surrounding satellite systems. Our analysis of the ensemble of dwarf satellites around NGC6744 reveals a new galaxy, EDwC1, a nucleated dwarf spheroidal at the end of a spiral arm. Our new census of the globular clusters around NGC2403 yields 9 new star-cluster candidates, 8 of which with colors indicative of evolved stellar populations. In summary, our investigation of the 6 Showcase galaxies demonstrates that Euclid is a powerful probe of the anatomy of nearby galaxies [abridged].

KW - Astrophysics - Astrophysics of Galaxies

U2 - 10.48550/arXiv.2405.13499

DO - 10.48550/arXiv.2405.13499

M3 - Preprint

T3 - ArXiv

BT - Euclid: Early Release Observations -- Deep anatomy of nearby galaxies

PB - arXiv

ER -

Euclid: Early Release Observations -- Deep anatomy of nearby galaxies

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