The influence of diffuse scattered light II. Observations of galaxy haloes and thick discs and hosts of BCGs

Abstract

Studies of deep photometry of galaxies have presented discoveries of excess light in surface-brightness and colour profiles at large radii in the form of diffuse faint haloes and thick discs. In a majority of the cases, it has seemed necessary to use exotic stellar populations or alternative physical solutions to explain the excess. Few studies have carefully scrutinized the role of scattered light in this context. I explore the influence of scattered light on ground-based observations of haloes and thick discs around edge-on galaxies, haloes around face-on disc galaxies, host galaxies around blue compact galaxies (BCGs), and haloes around elliptical galaxies. Surface-brightness structures of all considered types of galaxies are modelled and analysed to compare scattered-light haloes and thick discs with measurements. I simulate the influence of scattered light and accurate sky subtraction on simplified Sérsic-type and face-on disc galaxy models. All galaxy models are convolved with both lower-limit and brighter point spread functions (PSFs); for a few galaxies it was possible to use dedicated PSFs. The results show bright scattered-light haloes and high amounts of red excess at large radii and faint surface brightnesses for nearly all types of galaxies; exceptions are the largest elliptical-type galaxies where the influence of scattered light is smaller. Studies have underestimated the role of scattered light to explain their surface-brightness profiles. My analysis shows surface-brightness profiles that include scattered light that are very similar to and overlap measurements at all radii. The derivation of physical properties of haloes, thick discs, and BCG hosts from diffuse data is misleading since accurate and radially extended PSFs are non-existent. Significantly improved analyses that include new measurements of PSFs are required to study diffuse haloes further.

arXiv comment18 pages, 11 figures, and 15 pages + 11 figures in appendix, accepted for publication in A&A

References in corpus (50)

• The Hubble Ultra Deep Field
• Structure and Formation of Elliptical and Spheroidal Galaxies
• The Growth of Massive Galaxies Since z=2
• On the shape of the light profiles of early-type galaxies
• Stellar Tidal Streams in Spiral Galaxies of the Local Volume: A Pilot Survey with Modest Aperture Telescopes
• The most metal-poor galaxies
• The Atlas3D project -- XXIX. The new look of early-type galaxies and surrounding fields disclosed by extremely deep optical images
• The structure of galactic disks: Studying late-type spiral galaxies using SDSS
• Ly-alpha Emission-Line Galaxies at z = 3.1 in the Extended Chandra Deep Field South
• Structural Parameters of Thin and Thick Disks in Edge-On Disk Galaxies
• The Milky Way has no thick disk
• Anti-Truncation of Disks in Early-Type Barred Galaxies
• The Outer Disks of Early-Type Galaxies. I. Surface-Brightness Profiles of Barred Galaxies
• A Structural and Dynamical Study of Late-Type, Edge-On Galaxies: II. Vertical Color Gradients and the Detection of Ubiquitous Thick Disks
• Lyman-Alpha-Emitting Galaxies at z = 2.1 in ECDF-S: Building Blocks of Typical Present-day Galaxies?
• Observations of Thick Disks in the Hubble Space Telescope Ultra Deep Field
• Thick disks of edge-on galaxies seen through the Spitzer Survey of Stellar Structure in Galaxies (S4G): Lair of missing baryons?
• Diffuse Lyman Alpha Haloes around Lyman Alpha Emitters at z=3: Do Dark Matter Distributions Determine the Lyman Alpha Spatial Extents?
• Parametrizing the Stellar Haloes of Galaxies
• First results from the Dragonfly Telephoto Array: the apparent lack of a stellar halo in the massive spiral galaxy M101
• Halos around edge-on disk galaxies in the SDSS
• A Study of Edge-On Galaxies with the Hubble Space Telescope's Advanced Camera for Surveys. II. Vertical distribution of the resolved stellar population
• The Subaru Ly-alpha blob survey: A sample of 100 kpc Ly-alpha blobs at z=3
• The influence of diffuse scattered light I. The PSF and its role to observations of the edge-on galaxy NGC 5907
• The V R I colours of HII galaxies
• The Morphology of HII Galaxies
• The Kinematics of Thick Disks in Nine External Galaxies
• The faint stellar halos of massive red galaxies from stacks of more than 42000 SDSS LRG images
• The Kinematics of Thick Disks in External Galaxies
• Deep CCD Surface Photometry of the Edge-On Spiral NGC 4244
• Efficient deconvolution methods for astronomical imaging: algorithms and IDL-GPU codes
• Intermediate-band Surface Photometry of the Edge-on Galaxy: NGC 4565
• The Host in Blue Compact Galaxies: Structural Properties and Scaling Relations
• The Structure and Stellar Content of the Outer Disks of Galaxies: A New View from the Pan-STARRS1 Medium Deep Survey
• Searching for Neutral Hydrogen Halos around z ~ 2.1 and z ~ 3.1 Ly-alpha Emitting Galaxies
• Thick Disks of Lenticular Galaxies
• Detection of Ultraviolet Halos around Highly Inclined Galaxies
• What will blue compact dwarf galaxies evolve into?
• A Structural and Dynamical Study of Late-Type, Edge-On Galaxies: I. Sample Selection and Imaging Data
• A faint red stellar halo around an edge-on disc galaxy in the Hubble Ultra Deep Field
• The stellar host in blue compact dwarf galaxies: the need for a two-dimensional fit
• Stellar haloes of disc galaxies at z~1
• Stellar disks and halos of the edge-on spiral galaxies: NGC 891, NGC 4144 and NGC 4244
• Deep multiband surface photometry on star forming galaxies: I. A sample of 24 blue compact galaxies
• Stellar haloes outshine disc truncations in low-inclined spirals
• The Red Halo Phenomenon
• Direct detection of galaxy stellar halos : NGC 3957 as a test case
• Deep multiband surface photometry on star forming galaxies: II. A volume limited sample of 21 emission lines galaxies
• Isothermal distributions in MONDian gravity as a simple unifying explanation for the ubiquitous $\rho \propto r^{-3}$ density profiles in tenuous stellar halos
• Are the red halos of galaxies made of low-mass stars? Constraints from subdwarf star counts in the Milky Way halo

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• The Burrell Schmidt Deep Virgo Survey: Tidal Debris, Galaxy Halos, and Diffuse Intracluster Light in the Virgo Cluster
• Beyond 31 mag/arcsec^2: the low surface brightness frontier with the largest optical telescopes
• Dark Energy Survey Year 1 results: Detection of Intra-cluster Light at Redshift $\sim$ 0.25
• The Sloan Digital Sky Survey extended point spread functions
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• Convergence of Lobatto-type Runge-Kutta methods for partitioned differential-algebraic systems of index 2
• The missing light of the Hubble Ultra Deep Field
• Discovery of disc truncations above the galaxies' mid-plane in Milky Way-like galaxies
• Thick Disks in the Hubble Space Telescope Frontier Fields
• The Halos and Environments of Nearby Galaxies (HERON) I: Imaging, Sample Characteristics, and Envelope Diameters
• Euclid preparation: XVI. Exploring the ultra low-surface brightness Universe with Euclid/VIS
• The Red and Featureless Outer Disks of Nearby Spiral Galaxies
• A Deconvolution Technique to Correct Deep Images of Galaxies from Instrumental Scattered Light
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• HERschel Observations of Edge-on Spirals (HEROES). IV. Dust energy balance problem
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• The kinematics of local thick discs do not support an accretion origin
• The dragonfly nearby galaxies survey. Iv. A giant stellar disk in ngc 2841
• Galaxy and Mass Assembly (GAMA): Extended Intra-Group Light in a group at $z=0.2$ from deep Hyper-Suprime Cam images
• Ultraviolet Halos Around Spiral Galaxies. I. Morphology
• The Halos and Environments of Nearby Galaxies (HERON) II: The outer structure of edge-on galaxies
• Extragalactic archeology with the GHOSTS Survey I. - Age-resolved disk structure of nearby low-mass galaxies
• Comparison of the extraplanar H$\alpha$ and UV emissions in the halos of nearby edge-on spiral galaxies
• The complex case of MACSJ0717.5+3745 and its extended filament: intra-cluster light, galaxy luminosity function, and galaxy orientations
• The multifarious ionization sources and disturbed kinematics of extraplanar gas in five low-mass galaxies
• Ultraviolet Radiative Transfer Modeling of Nearby Galaxies with Extraplanar Dusts
• Properties of extragalactic thick discs recovered from ultra-deep Stripe82 imaging
• A $\sim$15 kpc outflow cone piercing through the halo of the blue compact metal-poor galaxy SBS0335-052
• Ultra-deep Imaging: Structure of Disks and Haloes
• The Dragonfly Edge-on Galaxies Survey: Shaping the outer disc of NGC 4565 via accretion
• The Extended Disk Galaxy Exploration Science Survey: Description and Surface Brightness Profile Properties
• Joint Modelling of Dust Scattering and Thermal Emission: The Spider Complex
• Evolution of the anti-truncated stellar profiles of S0 galaxies since $z=0.6$ in the SHARDS survey: I - Sample and Methods
• Morphology and surface photometry of a sample of isolated early-type galaxies from deep imaging
• The problem of dust attenuation in photometric decomposition of edge-on galaxies and possible solutions
• Structural analysis of massive galaxies using HST deep imaging at z < 0.5
• Evolution of the anti-truncated stellar profiles of S0 galaxies since $z=0.6$ in the SHARDS survey: II - Structural and photometric evolution
• Outskirts of Nearby Disk Galaxies: Star Formation and Stellar Populations
• Candidate List of Edge-on Galaxies with Substantial Extraplanar Dust
• LIGHTS. A robust technique to identify galaxy edges
• The truncation of the disk of NGC 4565: Detected up to z=4 kpc, with star formation, and affected by the warp
• Future Prospects: Deep Imaging of Galaxy Outskirts using Telescopes Large and Small
• Flares, Warps, Truncations, and Satellite: The Ultra-thin Galaxy UGC 11859
• Revealing the Warm and Hot Halo Baryons via Thomson Scattering of Quasar Light
• The Intrinsic Flattening of Galaxy Disks
• The Australian Space Eye: studying the history of galaxy formation with a CubeSat
• Comparing the structural parameters of the Milky Way to other spiral galaxies
• J-PLUS: Turning Off the Bright Stars
• Isophotal signatures of the brightest cluster galaxy - intracluster light transition