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We present a multi-scale and multi-wavelength study to unveil massive star formation (MSF) processes around sites AFGL 5180, and AFGL 6366S, both hosting a Class II 6.7 GHz methanol maser emission. The radio continuum map at 8.46 GHz…

Astrophysics of Galaxies · Physics 2023-06-14 A. K. Maity , L. K. Dewangan , N. K. Bhadari , D. K. Ojha , Z. Chen , Rakesh Pandey

We examine the inner mass distribution of the relaxed galaxy cluster Abell 383 in deep 16-band HST/ACS+WFC3 imaging taken as part of the CLASH multi-cycle treasury program. Our program is designed to study the dark matter distribution in 25…

Deep near-infrared imaging surveys allow us to select and study distant galaxies in the rest-frame optical, and have transformed our understanding of the early Universe. As the vast majority of K- or IRAC-selected galaxies is too faint for…

The MeerKAT Large Area Synoptic Survey (MeerKLASS) collaboration has acquired multiple passes of L-band (856-1712 MHz) scanning observations over a 268 deg$^2$ sky region. This scanning enables efficient, large-area sky surveys by…

Intrinsic alignments of galaxy shapes are a major systematic for weak gravitational lensing and provide insight into how galaxies acquire orientations within the cosmic web. Most studies rely on large statistical samples; here, we probe…

Cosmology and Nongalactic Astrophysics · Physics 2026-05-25 M. Mondelin , S. Codis , J. -C. Cuillandre , R. Paviot , T. de Boer

Galaxy surveys probe both structure formation and the expansion rate, making them promising avenues for understanding the dark universe. Photometric surveys accurately map the 2D distribution of galaxy positions and shapes in a given…

Cosmology and Nongalactic Astrophysics · Physics 2017-06-19 Samuel Passaglia , Alessandro Manzotti , Scott Dodelson

The Depth from Defocus (DFD) imaging technique for measuring the size and number concentration of particles in a dispersed two-phase flow has up to now been restricted to relatively sparse particle densities and to identifying only…

Fluid Dynamics · Physics 2024-04-01 Rixin Xua , Zuojie Huanga , Wenchao Gonga , Wu Zhoua , Cameron Tropea

We propose to use degree-scale angular clustering of fast radio bursts (FRBs) to identify their origin and the host galaxy population. We study the information content in autocorrelation of the angular positions and dispersion measures (DM)…

Cosmology and Nongalactic Astrophysics · Physics 2017-05-03 Masato Shirasaki , Kazumi Kashiyama , Naoki Yoshida

Here we present the results of various approaches to measure accurate colours and photometric redshifts (photo-z's) from wide-field imaging data. We use data from the Canada-France-Hawaii-Telescope Legacy Survey (CFHTLS) which have been re-…

We present a progress report on the design and construction of the Field-Imaging Far-Infrared Line Spectrometer (FIFI LS) for the SOFIA airborne observatory. The design of the instrument is driven by the goal of maximizing observing…

Astrophysics · Physics 2015-06-24 L. W. Looney , N. Geis , R. Genzel , W. K. Park , A. Poglitsch , W. Raab , D. Rosenthal , A. Urban , T. Henning

We present multi-waveband optical imaging data obtained from observations of the Subaru/XMM-Newton Deep Survey (SXDS). The survey field, centered at R.A.=02:18:00, decl.=-05:00:00, has been the focus of a wide range of multi-wavelength…

MeerKAT's large number of antennas, spanning 8 km with a densely packed 1 km core, create a powerful instrument for wide-area surveys, with high sensitivity over a wide range of angular scales. The MeerKAT Galaxy Cluster Legacy Survey…

Astrophysics of Galaxies · Physics 2022-01-19 K. Knowles , W. D. Cotton , L. Rudnick , F. Camilo , S. Goedhart , R. Deane , M. Ramatsoku , M. F. Bietenholz , M. Brüggen , C. Button , H. Chen , J. O. Chibueze , T. E. Clarke , F. de Gasperin , R. Ianjamasimanana , G. I. G. Józsa , M. Hilton , K. C. Kesebonye , K. Kolokythas , R. C. Kraan-Korteweg , G. Lawrie , M. Lochner , S. I. Loubser , P. Marchegiani , N. Mhlahlo , K. Moodley , E. Murphy , B. Namumba , N. Oozeer , V. Parekh , D. S. Pillay , S. S. Passmoor , A. J. T. Ramaila , S. Ranchod , E. Retana-Montenegro , L. Sebokolodi , S. P. Sikhosana , O. Smirnov , K. Thorat , T. Venturi , T. D. Abbott , R. M. Adam , G. Adams , M. A. Aldera , E. F. Bauermeister , T. G. H. Bennett , W. A. Bode , D. H. Botha , A. G. Botha , L. R. S. Brederode , S. Buchner , J. P. Burger , T. Cheetham , D. I. L. de Villiers , M. A. Dikgale-Mahlakoana , L. J. du Toit , S. W. P. Esterhuyse , G. Fadana , B. L. Fanaroff , S. Fataar , A. R. Foley , D. J. Fourie , B. S. Frank , R. R. G. Gamatham , T. G. Gatsi , M. Geyer , M. Gouws , S. C. Gumede , I. Heywood , M. J. Hlakola , A. Hokwana , S. W. Hoosen , D. M. Horn , J. M. G. Horrell , B. V. Hugo , A. R. Isaacson , J. L. Jonas , J. D. B. Jordaan , A. F. Joubert , R. P. M. Julie , F. B. Kapp , V. A. Kasper , J. S. Kenyon , P. P. A. Kotzé , A. G. Kotze , N. Kriek , H. Kriel , V. K. Krishnan , T. W. Kusel , L. S. Legodi , R. Lehmensiek , D. Liebenberg , R. T. Lord , B. M. Lunsky , K. Madisa , L. G. Magnus , J. P. L. Main , A. Makhaba , S. Makhathini , J. A. Malan , J. R. Manley , S. J. Marais , M. D. J. Maree , A. Martens , T. Mauch , K. McAlpine , B. C. Merry , R. P. Millenaar , O. J. Mokone , T. E. Monama , M. C. Mphego , W. S. New , B. Ngcebetsha , K. J. Ngoasheng , M. T. Ockards , A. J. Otto , A. A. Patel , A. Peens-Hough , S. J. Perkins , N. M. Ramanujam , Z. R. Ramudzuli , S. M. Ratcliffe , R. Renil , A. Robyntjies , A. N. Rust , S. Salie , N. Sambu , C. T. G. Schollar , L. C. Schwardt , R. L. Schwartz , M. Serylak , R. Siebrits , S. K. Sirothia , M. Slabber , L. Sofeya , B. Taljaard , C. Tasse , A. J. Tiplady , O. Toruvanda , S. N. Twum , T. J. van Balla , A. van der Byl , C. van der Merwe , C. L. van Dyk , V. Van Tonder , R. Van Wyk , A. J. Venter , M. Venter , M. G. Welz , L. P. Williams , B. Xaia

The two-point correlation function (2pcf) is the key statistic in structure formation; it measures the clustering of galaxies or other density field tracers. Estimators of the 2pcf, including the standard Landy-Szalay (LS) estimator,…

Cosmology and Nongalactic Astrophysics · Physics 2021-03-31 Kate Storey-Fisher , David W. Hogg

The discovery of the large-scale structure has transformed our view of galaxy formation and evolution. Filaments of the cosmic web provide key environments that channel the growth of structures. Guided by predictions from cosmological…

Astrophysics of Galaxies · Physics 2025-11-11 M. Mondelin , S. Codis , J-C. Cuillandre , C. Laigle , A. Boselli , K. Kraljic , C. Stone

We have obtained deep and wide field imaging of the Coma cluster of galaxies with the CFH12K camera at CFHT in the B, V, R and I filters. In this paper, we present the observations, data reduction, catalogs and first scientific results. We…

In this letter, a fast Fourier transform (FFT)-enhanced low-complexity super-resolution sensing algorithm for near-field source localization with both angle and range estimation is proposed. Most traditional near-field source localization…

Signal Processing · Electrical Eng. & Systems 2024-11-26 Yuxiao Wu , Huizhi Wang , Yong Zeng

In this thesis, wide-field 2D spectroscopy is employed in order to characterise the nebular properties of late-type field galaxies. The observations performed for this dissertation represent the first endeavour to obtain full 2D coverage of…

Cosmology and Nongalactic Astrophysics · Physics 2010-06-07 F. F. Rosales-Ortega

The matter environment of galaxies is connected to the physics of galaxy formation and evolution. Utilising galaxy-galaxy-galaxy lensing as a direct probe, we map out the distribution of correlated surface mass-density around galaxy pairs…

Cosmology and Nongalactic Astrophysics · Physics 2019-02-06 P. Simon , H. Saghiha , S. Hilbert , P. Schneider , C. Boever , A. H. Wright

We present an analysis of the clustering of galaxies from z ~ 2 to the present day using the WIRCam Deep Survey (WIRDS). WIRDS combines deep near-infrared data with the deep optical data from the CFHTLS Deep fields, providing a photometric…

Cosmology and Nongalactic Astrophysics · Physics 2014-09-05 R. M. Bielby , V. Gonzalez-Perez , H. J. McCracken , O. Ilbert , E. Daddi , O. Le Fèvre , P. Hudelot , J. -P. Kneib , Y. Mellier , C. Willott
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