Cited by 27Galaxies: Formation, Evolution, PhenomenaStellar, planetary, and galactic studiesAstrophysical Phenomena and Observations

Galaxy And Mass Assembly (GAMA): extended intragroup light in a group at z = 0.2 from deep Hyper Suprime-Cam images

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Martínez-Lombilla, Cristina, Brough, Sarah, Montes, Mireia, Baena-Gallé, Roberto, Akhlaghi, Mohammad, Infante-Sainz, Raúl, Driver, Simon P, Holwerda, Benne W +2 more·2022·Monthly Notices of the Royal Astronomical Society

Abstract

We present a pilot study to assess the potential of Hyper Suprime-Cam Public Data Release 2 (HSC-PDR2) images for the analysis of extended faint structures within groups of galaxies. We examine the intragroup light (IGL) of the group 400138 (Mdyn = 1.3 ± 0.5 × 1013 M⊙, z ∼ 0.2) from the Galaxy And Mass Assembly (GAMA) survey using Hyper Suprime-Cam Subaru Strategic Program Public Data Release 2 (HSC-SSP PDR2) images in g, r, and i bands. We present the most extended IGL measurement to date, reaching down to $\mu _{g}^{\rm {lim}}=30.76$ mag arcsec−2 (3σ; 10 × 10 arcsec2) at a semimajor axis of 275 kpc. The IGL shows mean colour values of g − i = 0.92, g − r = 0.60, and r − i = 0.32 (±0.01). The IGL stellar populations are younger (2–2.5 Gyr) and less metal rich ([Fe/H] ∼ −0.4) than those of the host group galaxies. We find a range of IGL fractions as a function of total group luminosity of ${\sim} 2\!-\!36 {{\ \rm per\ cent}}$ depending on the definition of IGL, with larger fractions the bluer the observation wavelength. The early-type to late-type galaxy ratio suggests that 400138 is a more evolved group, dominated by early-type galaxies, and the IGL fraction agrees with that of other similarly evolved groups. These results are consistent with tidal stripping of the outer parts of Milky Way-like galaxies as the main driver of the IGL build-up. This is supported by the detection of substructure in the IGL towards the galaxy member 1660615 suggesting a recent interaction (<1 Gyr ago) of that galaxy with the core of the group.

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  • The HSC-SSP Ultradeep field spans an area of 3.5 deg^2 and reaches μ_r ∼ 29.82 mag arcsec^-2, a surface brightness depth faint enough to detect tidal features.

    “We use the Ultradeep field, which spans an area of 3 . 5 deg 2 and reaches 𝜇 𝑟 ∼ 29.82 mag arcsec -2 (Martínez-Lombilla et al. 2023), a surface brightness depth faint enough to detect tidal features.”

    From Detecting galaxy tidal features using self-supervised representation learning (2024) · cites this paper as Martínez-Lombilla et al. 2023

    Section 3.5 reports an r-band surface-brightness limit of 29.82 mag arcsec⁻² for the authors’ HSC ultradeep data, measured at 3σ in 10 × 10 arcsec² boxes. Section 4.1 describes detection of a faint diffuse-light tail, but our copy does not establish that the Ultradeep field spans 3.5 deg²; Section 2.2 gives 1.77 deg² as the camera’s imaging area, not the field’s area. (LLM, conf=0.86)

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  • HSC-PDR2 has been widely tested for low surface brightness studies and fulfils the requirements for this study.

    “HSC-PDR2 has been widely tested for low surface brightness studies (e.g. Huang et al. 2018, 2020; Li et al. 2022; Martínez-Lombilla et al. 2023) and fulfils the requirements for our study.”

    From Detecting galaxy tidal features using self-supervised representation learning (2024) · cites this paper as Martínez-Lombilla et al. 2023

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Research works printed but not linked: 1

  1. Joye W. A., Mandel E., 2003, in Payne H. E., Jedrzejewski R. I., Hook R. N., eds, ASP Conf. Ser. Vol. 295, Astronomical Data Analysis Software and Systems XII. Astron. Soc. Pac., San Francisco, p. 489

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Authors
Martínez-Lombilla, C., Brough, S., Montes, M., Baena-Gallé, R., Akhlaghi, M., Infante-Sainz, R., Driver, S. P., Holwerda, B. W., Pimbblet, K. A., & Robotham, A. S. G.
Affiliations
  • Australian Research Council (AU)
  • UNSW Sydney (AU)
  • Space Telescope Science Institute (US)
  • Universidad Internacional de La Rioja (ES)
  • Centro de Estudios de Física del Cosmos de Aragón (ES)
  • Centro de Estudios de Física del Cosmos de Aragón (CEFCA) , Plaza San Juan 1, E-44001 Teruel, Spain
  • The University of Western Australia (AU)
  • University of Louisville (US)
  • University of Hull (GB)
Corresponding author
Martínez-Lombilla, Cristina
Venue
Monthly Notices of the Royal Astronomical Society
Published
2022-11-24
Volume
518
Issue
1
Pages
1195-1213
ISSN
  • 0035-8711 (ISSN-L)
  • 1365-2966
OpenAlex
W4309818276
Cited by
27
References
146
Citations by year
2026: 4 · 2025: 10 · 2024: 4 · 2023: 9
FWCI
2.27
Type
journal article
Language
en
Open access
Locations
  • Monthly Notices of the Royal Astronomical Society (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • UWA Profiles and Research Repository (UWA) (submittedVersion, other-oa)
  • Repository@Hull (Worktribe) (University of Hull) (submittedVersion, cc-by)
  • Re-Unir (International University of La Rioja) (submittedVersion, other-oa)
  • ThinkIR: The University of Louisville's Institutional Repository (University of Louisville) (submittedVersion)
  • arXiv (Cornell University)
Funders
  • Australian Research Council (DP190101943, CE170100013)
  • Spanish State Research Agency
  • AEI
  • Spanish Ministry of Science and Innovation (PID2019-105602GB-I00)
  • European Union (ICTS-MRR-2021-03-CEFCA)
  • Ministerio de Ciencia, Innovación y Universidades
  • FEDER (PGC2018-097585-B-C21)
  • STFC
  • ARC
  • UNSW
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Galaxies: Formation, Evolution, Phenomena
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astrophysical Phenomena and Observations
Keywords
galaxy groups, tidal stripping, Hyper Suprime-Cam, GAMA survey, stellar populations, galaxy interactions, early-type galaxies, Milky Way-like galaxies

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