We present the observed HI size-mass relation of 204 galaxies from the MIGHTEE Survey Early Science data. The high sensitivity of MeerKAT allows us to detect galaxies spanning more than 4 orders of magnitude in HI mass, ranging from dwarf galaxies to massive spirals, and including all morphological types. This is the first time the relation has …
In this paper we will list a few important goals that need to be addressed in the next decade, also taking into account the current discordances between the different cosmological probes, such as the disagreement in the value of the Hubble constant H0, the σ8–S8 tension, and other less statistically significant anomalies. While these discordances can still be …
We investigate the fine-structure [CII] line at 158μm as a molecular gas tracer by analyzing the relationship between molecular gas mass (Mmol) and [CII] line luminosity (L[CII]) in 11,125 z≃6 star-forming, main sequence galaxies from the SIMBA simulations, with line emission modeled by SÍGAME. Though most (∼50−100%) of the gas mass in our simulations is ionized, the bulk …
PSR J0955−6150 is a member of a class of eccentric MSP+He WD systems (eMSPs), whose binary evolution is poorly understood and believed to be different to that of traditional MSP+He WD systems. Measuring the masses of the stars in this system is important for testing hypotheses for the formation of eMSPs. We have carried out …
The majority of the stellar mass in the Universe today resides in galaxies with two primary structural components (bulge and disk). In this work, we use the largest contiguous HST imaging region (COSMOS), the Deep Extragalactic VIsible Legacy Survey (DEVILS), and the galaxy structural fitting code {\sc ProFit}, to deconstruct ∼35,000 galaxies into their sub-structures. We use …
One of the most common methods for inferring galaxy attenuation curves is via spectral energy distribution (SED) modeling, where the dust attenuation properties are modeled simultaneously with other galaxy physical properties. In this paper, we assess the ability of SED modeling to infer these dust attenuation curves from broadband photometry, and suggest a new flexible …
In this data release from the LOFAR Two-metre Sky Survey (LoTSS) we present 120-168MHz images covering 27% of the northern sky. Our coverage is split into two regions centred at approximately 12h45m +44∘30′ and 1h00m +28∘00′ and spanning 4178 and 1457 square degrees respectively. The images were derived from 3,451hrs (7.6PB) of LOFAR High Band …
The relation between the integrated Sunyaev-Zeldovich (SZ) y-decrement versus halo mass (Y-M) can potentially constrain galaxy formation models, if theoretical and observational systematics can be properly assessed. We investigate the Y−M relation in the SIMBA and IllustrisTNG-100 cosmological hydrodynamic simulations, quantifying the effects of feedback, line-of-sight projection, and beam convolution. We find that SIMBA’s AGN jet feedback generates …
Features in the primordial power spectrum represent the imprinted signal in the density perturbations of the physics and evolution of the early Universe. A measurement of such signals will represents the need to go beyond the minimal assumption made for the initial conditions of the cosmological perturbations. For the first time, we study different templates …
How do we appropriately fit a model based on an idealised Friedmann-Lemaıtre Robertson-Walker (FLRW) spacetime to observations made from a single location in a lumpy Universe? We address this question for surveys that measure the imprints of the Baryon Acoustic Oscillation (BAO) in galaxy distribution and the peak apparent magnitude of the type 1A supernova …
