Multiwavelength analysis of low surface brightness galaxies to study possible dark matter signature

Abstract Low Surface Brightness (LSB) galaxies have very diffuse, low surface density stellar disks which appear faint in optical images. They are very rich in neutral hydrogen (HI) gas, which extends well beyond the stellar disks. Their extended HI rotation curves and stellar disks indicate that they have very massive dark matter (DM) halos compared to normal bright galaxies. Hence, LSB galaxies may represent valuable laboratories for the indirect detection of DM. In this paper, we search for WIMP annihilation signatures in four LSB galaxies and present an analysis of nearly nine years of data from the Fermi Large Area Telescope (LAT). Above 500 MeV, no excess emission was detected from the LSB galaxies. We obtain constraints on the DM cross-section for different annihilation channels, for both individual and stacked targets. In addition to this, we use radio data from the Very Large Array (VLA) radio telescope in order to derive DM constraints, following a multiwavelength approach. The constraints obtained from the four considered LSB galaxies are nearly 3 orders of magnitude weaker than the predicted limits for the thermal relic abundances and the combined limits achieved from Fermi-LAT observations of dwarf spheroidal galaxies. Finally, we discuss the possibility of detecting emission from LSB galaxies using the upcoming ground-based γ-ray and radio observatories, namely the Cherenkov Telescope Array (CTA) and the Square Kilometre Array (SKA).

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CDM in LSB Galaxies: Toward the Optimal Halo Profile

Symposium - International Astronomical Union ◽

10.1017/s0074180900182890 ◽

2004 ◽

Vol 220 ◽

pp. 69-76 ◽

Cited By ~ 1

Author(s):

W. J. G de Blok

Keyword(s):

Dark Matter ◽

Total Mass ◽

Surface Brightness ◽

Cold Dark Matter ◽

Mass Density ◽

Constant Density ◽

Adequate Description ◽

Density Distributions ◽

Low Surface Brightness ◽

Lsb Galaxies

Low Surface Brightness (LSB) galaxies are dominated by dark matter. High-resolution rotation curves suggest that their total mass-density distributions are dominated by constant density cores rather than the steep and cuspy distributions found in Cold Dark Matter (CDM) simulations. the data are best described by a model with a soft core with an inner power-law mass-density slope α = 0.2 ± 0.2. However no single universal halo profile provides an adequate description of the data. the observed mass profiles appear to be inconsistent with ACDM.

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The universal rotation curve of low surface brightness galaxies – IV. The interrelation between dark and luminous matter

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/stz2700 ◽

2019 ◽

Vol 490 (4) ◽

pp. 5451-5477 ◽

Cited By ~ 5

Author(s):

Chiara Di Paolo ◽

Paolo Salucci ◽

Adnan Erkurt

Keyword(s):

Dark Matter ◽

Surface Brightness ◽

Rotation Curve ◽

High Surface ◽

Dark Matter Halo ◽

Rotation Curves ◽

Central Surface ◽

Low Surface Brightness ◽

Low Surface Brightness Galaxies ◽

Lsb Galaxies

ABSTRACT We investigate the properties of the baryonic and the dark matter components in low surface brightness (LSB) disc galaxies, with central surface brightness in the B band $\mu _0 \ge 23 \, \mathrm{mag \, arcsec}^{-2}$. The sample is composed of 72 objects, whose rotation curves show an orderly trend reflecting the idea of a universal rotation curve (URC) similar to that found in the local high surface brightness (HSB) spirals in previous works. This curve relies on the mass modelling of the co-added rotation curves, involving the contribution from an exponential stellar disc and a Burkert cored dark matter halo. We find that the dark matter is dominant especially within the smallest and less luminous LSB galaxies. Dark matter haloes have a central surface density $\Sigma _0 \sim 100 \, \mathrm{M}_{\odot } \, \mathrm{pc}^{-2}$, similar to galaxies of different Hubble types and luminosities. We find various scaling relations among the LSBs structural properties which turn out to be similar but not identical to what has been found in HSB spirals. In addition, the investigation of these objects calls for the introduction of a new luminous parameter, the stellar compactness C* (analogously to a recent work by Karukes & Salucci), alongside the optical radius and the optical velocity in order to reproduce the URC. Furthermore, a mysterious entanglement between the properties of the luminous and the dark matter emerges.

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Fundamental Properties of the Dark and the Luminous Matter from the Low Surface Brightness Discs

Universe ◽

10.3390/universe7090344 ◽

2021 ◽

Vol 7 (9) ◽

pp. 344

Author(s):

Paolo Salucci ◽

Chiara di Paolo

Keyword(s):

Dark Matter ◽

Surface Brightness ◽

Stellar Disk ◽

Rotating Disc ◽

Fundamental Properties ◽

Low Surface Brightness ◽

Luminous Matter ◽

Lsb Galaxies ◽

The Universe ◽

Disc Galaxies

Dark matter (DM) is one of the biggest mystery in the Universe. In this review, we start reporting the evidences for this elusive component and discussing about the proposed particle candidates and scenarios for such phenomenon. Then, we focus on recent results obtained for rotating disc galaxies, in particular for low surface brightness (LSB) galaxies. The main observational properties related to the baryonic matter in LSBs, investigated over the last decades, are briefly recalled. Next, these galaxies are analyzed by means of the mass modelling of their rotation curves both individual and stacked. The latter analysis, via the universal rotation curve (URC) method, results really powerful in giving a global or universal description of the properties of these objects. We report the presence in LSBs of scaling relations among their structural properties that result comparable with those found in galaxies of different morphologies. All this confirms, in disc systems, the existence of a strong entanglement between the luminous matter (LM) and the dark matter (DM). Moreover, we report how in LSBs the tight relationship between their radial gravitational accelerations g and their baryonic components gb results to depend also on the stellar disk length scale and the radius at which the two accelerations have been measured. LSB galaxies strongly challenge the ΛCDM scenario with the relative collisionless dark particle and, alongside with the non-detection of the latter, contribute to guide us towards a new scenario for the DM phenomenon.

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Observational Constraints on the Physical Parameters of Dark Matter Halos

Symposium - International Astronomical Union ◽

10.1017/s0074180900183809 ◽

2004 ◽

Vol 220 ◽

pp. 447-454

Author(s):

Claude Carignan

Keyword(s):

Dark Matter ◽

Surface Brightness ◽

Physical Parameters ◽

Observational Constraints ◽

Dark Matter Halos ◽

Low Surface Brightness ◽

Interacting Systems ◽

The Difference ◽

Tidal Tails ◽

Lsb Galaxies

After looking at the difference in the mass distribution between massive spiral and dwarf irregular (dIrr) and low surface brightness (LSB) galaxies, the central Dark Matter (DM) concentration (flat vs cuspy) in dwarf and LSB galaxies, derived from observations, will be examined. We will then present what kind of observational constraints can be put on the total mass and total extent of DM halos from the studies of individual galaxies, small groups, satellites' dynamics and tidal tails of interacting systems. Finally, we will discuss how limits on the physical parameters of DM halos could be set by deriving extended rotation curves beyond the HI radius (r > rHI), using either Lyα absorption or Hα emission observations.

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An HI Survey of LSB galaxies selected from the APM Survey

International Astronomical Union Colloquium ◽

10.1017/s0252921100054488 ◽

1999 ◽

Vol 171 ◽

pp. 307-314 ◽

Cited By ~ 1

Author(s):

Stéphanie Côté ◽

Tom Broadhurst ◽

Jon Loveday ◽

Shannon Kolind

Keyword(s):

Total Mass ◽

Surface Brightness ◽

Luminosity Function ◽

Neutral Hydrogen ◽

Mass Function ◽

Low Surface Brightness ◽

Redshift Survey ◽

First Time ◽

Lsb Galaxies ◽

Negligible Contribution

AbstractWe present preliminary results of a neutral hydrogen (HI) redshift survey to find Low Surface Brightness (LSB) galaxies in the very nearby universe. Our sample consists of all galaxies in the APM catalog (Maddox et al. 1990) with a mean surface brightness of μ ≥ 24 mag/arcsec2, down to a magnitude limit of bj ≤ 17. With the Parkes 64m radiotelescope 35 objects were detected at v < 4300 km s−1. The resulting luminosity function, HI mass function, and for the first time total mass function are presented. It is found that LSBs make a negligible contribution to the overall integrated luminosity, HI mass, and total mass contained in galaxies.

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