Search Publications
A large population of strongly lensed faint submillimetre galaxies in future dark energy surveys inferred from JWST imaging
Conselice, Christopher J.; Ho, Luis C.; Babul, Arif +13 more
Bright galaxies at submillimetre wavelengths from Herschel are now well known to be predominantly strongly gravitationally lensed. The same models that successfully predicted this strongly lensed population also predict about 1 per cent of faint 450 µm-selected galaxies from deep James Clerk Maxwell Telescope (JCMT) surveys will also be stro…
The MeerKAT 1.3 GHz Survey of the Small Magellanic Cloud
Haberl, F.; Filipović, M. D.; Indebetouw, R. +22 more
We present new radio continuum images and a source catalogue from the MeerKAT survey in the direction of the Small Magellanic Cloud. The observations, at a central frequency of 1.3 GHz across a bandwidth of 0.8 GHz, encompass a field of view ~7° × 7° and result in images with resolution of 8 arcsec. The median broad-band Stokes I image Root Mean S…
Galactic 'Snake' IRDC G11.11-0.12: a site of multiple hub-filament systems and colliding filamentary clouds
Dewangan, L. K.; Sharma, Saurabh; Eswaraiah, C. +3 more
To probe star formation processes, we present a multiscale and multiwavelength investigation of the 'Snake' nebula/infrared dark cloud G11.11-0.12 (hereafter, G11; length ~27 pc). Spitzer images hint at the presence of subfilaments (in absorption), and reveal four infrared-dark hub-filament system (HFS) candidates (extent < 6 pc) towards G11, w…
New insights into the role of AGNs in forming the cluster red sequence
Koyama, Yusei; Kodama, Tadayuki; Shimakawa, Rhythm +7 more
As a considerable investment of time from various telescope facilities was dedicated toward studying the Spiderweb protocluster at z = 2.2, it so far remains one of the most extensively studied protocluster. We report here the latest results in this field, adding a new dimension to previous research on cluster formation at high redshift. Previous …
The dynamic centres of infrared-dark clouds and the formation of cores
Peretto, Nicolas; Ragan, Sarah E.; Watkins, Elizabeth J. +7 more
High-mass stars have an enormous influence on the evolution of the interstellar medium in galaxies, so it is important that we understand how they form. We examine the central clumps within a sample of seven infrared-dark clouds (IRDCs) with a range of masses and morphologies. We use 1-pc-scale observations from the Northern Extended Millimeter Ar…
The LOFAR Two-metre Sky Survey: The nature of the faint source population and SFR-radio luminosity relation using PROSPECTOR
Drake, Alyssa B.; Małek, Katarzyna; Morabito, Leah K. +12 more
Spectral energy distribution (SED) fitting has been extensively used to determine the nature of the faint radio source population. Recent efforts have combined fits from multiple SED-fitting codes to account for the host galaxy and any active nucleus that may be present. We show that it is possible to produce similar-quality classifications using …
A new derivation of the Hubble constant from γ-ray attenuation using improved optical depths for the Fermi and CTA era
Ajello, M.; Saldana-Lopez, A.; Pérez-González, P. G. +8 more
We present γ-ray optical-depth calculations from a recently published extragalactic background light (EBL) model built from multiwavelength galaxy data from the Hubble Space Telescope Cosmic Assembly Near-Infrared Deep Extragalactic Legacy Survey (HST/CANDELS). CANDELS gathers one of the deepest and most complete observations of stellar and dust e…
The Giant Molecular Cloud G148.24+00.41: gas properties, kinematics, and cluster formation at the nexus of filamentary flows
Zavagno, A.; Samal, M. R.; Ojha, D. K. +9 more
Filamentary flows towards the centre of molecular clouds have been recognized as a crucial process in the formation and evolution of stellar clusters. In this paper, we present a comprehensive observational study that investigates the gas properties and kinematics of the Giant Molecular Cloud G148.24+00.41 using the observations of CO (1-0) isotop…
A study of extreme C III]1908 & [O III]88/[C II]157 emission in Pox 186: implications for JWST+ALMA (FUV + FIR) studies of distant galaxies
Kumari, Nimisha; Aloisi, Alessandra; Leitherer, Claus +4 more
Carbon spectral features are ubiquitous in the ultraviolet (UV) and far-infrared (FIR) spectra of the reionization-era galaxies. We probe the ionized carbon content of a dwarf galaxy Pox 186 using the UV, optical, mid-infrared, and FIR data taken with Hubble, Gemini, Spitzer, and Herschel, respectively. This local (z ~ 0.0040705) galaxy is likely …
Massive star formation in the hub-filament system of RCW 117
Ojha, D. K.; Vig, S.; Ghosh, S. K. +1 more
We present a multiwavelength investigation of the hub-filament system RCW 117 (IRAS 17059-4132), which shows intricate filamentary features in the far-infrared, mapped using Herschel images. We obtain the column density and dust temperature maps for the region using the Herschel images and identify 88 cores and 12 filaments from the column density…