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We use 2MASS photometry to select blue horizontal branch (BHB) candidates covering the sky |b|>15 deg. A 12.5<J<15.5 sample of BHB stars traces the thick disk and inner halo to d<9 kpc, with a density comparable to that of M giant stars. We…

Astrophysics · Physics 2015-06-24 Warren R. Brown , M. J. Geller , S. J. Kenyon , T. C. Beers , M. J. Kurtz , J. B. Roll

We present a new, objectively defined catalog of candidate galaxy clusters based on the galaxy catalogs from the Digitized Second Palomar Observatory Sky Survey (DPOSS). This cluster catalog, derived from the best calibrated plates in the…

The upcoming imaging survey of the Chinese Space-station Survey Telescope (CSST) will deliver high-resolution imaging of an unprecedented number of galaxies for galaxy studies. To understand CSST's capability, and to support the preparation…

Astrophysics of Galaxies · Physics 2026-04-28 Ziqi Ma , Si-Yue Yu , Taotao Fang , Jinyi Shangguan , Zhao-Yu Li , Luis C. Ho

We have derived a new photographic photometry and proper motions for 20000 stars with completeness to V = 18 in the direction of galactic center at the intermediate latitude (l = 3 deg,b = 47 deg; alpha(1950)=15h 18m, delta(1950) = +02deg…

Astrophysics · Physics 2007-05-23 D. K. Ojha , O. Bienayme , A. C. Robin , V. Mohan

HectoMAP is a dense redshift survey of 95,403 galaxies based primarily on MMT spectroscopy with a median redshift $z = 0.345$. The survey covers 54.64 square degrees in a 1.5$^\circ$ wide strip across the northern sky centered at a…

Cosmology and Nongalactic Astrophysics · Physics 2023-03-15 Jubee Sohn , Margaret J. Geller , Ho Seong Hwang , Daniel G. Fabricant , Yousuke Utsumi , Ivana Damjanov

We describe the photometric data set assembled from the full six years of observations by the Dark Energy Survey (DES) in support of static-sky cosmology analyses. DES Y6 Gold is a curated data set derived from DES Data Release 2 (DR2) that…

Cosmology and Nongalactic Astrophysics · Physics 2025-01-14 K. Bechtol , I. Sevilla-Noarbe , A. Drlica-Wagner , B. Yanny , R. A. Gruendl , E. Sheldon , E. S. Rykoff , J. De Vicente , M. Adamow , D. Anbajagane , M. R. Becker , G. M. Bernstein , A. Carnero Rosell , J. Gschwend , M. Gorsuch , W. G. Hartley , M. Jarvis , T. Jeltema , R. Kron , T. A. Manning , J. O'Donnell , A. Pieres , M. Rodríguez-Monroy , D. Sanchez Cid , M. Tabbutt , L. Toribio San Cipriano , D. L. Tucker , N. Weaverdyck , M. Yamamoto , T. M. C. Abbott , M. Aguena , A. Alarcón , S. Allam , A. Amon , F. Andrade-Oliveira , S. Avila , P. H. Bernardinelli , E. Bertin , J. Blazek , D. Brooks , D. L. Burke , J. Carretero , F. J. Castander , R. Cawthon , C. Chang , A. Choi , C. Conselice , M. Costanzi , M. Crocce , L. N. da Costa , T. M. Davis , S. Desai , H. T. Diehl , S. Dodelson , P. Doel , C. Doux , A. Ferté , B. Flaugher , P. Fosalba , J. Frieman , J. García-Bellido , M. Gatti , E. Gaztanaga , G. Giannini , D. Gruen , G. Gutierrez , K. Herner , S. R. Hinton , D. L. Hollowood , K. Honscheid , D. Huterer , N. Jeffrey , E. Krause , K. Kuehn , O. Lahav , S. Lee , C. Lidman , M. Lima , H. Lin , J. L. Marshall , J. Mena-Fernández , R. Miquel , J. J. Mohr , J. Muir , J. Myles , R. L. C. Ogando , A. Palmese , A. A. Plazas Malagón , A. Porredon , J. Prat , M. Raveri , A. K. Romer , A. Roodman , S. Samuroff , E. Sanchez , V. Scarpine , M. Smith , M. Soares-Santos , E. Suchyta , G. Tarle , M. A. Troxel , V. Vikram , A. R. Walker , J. Weller , P. Wiseman , Y. Zhang

Exploiting the full statistical power of future cosmic shear surveys will necessitate improvements to the accuracy with which the gravitational lensing signal is measured. We present a framework for calibrating shear with image simulations…

Gravitational clustering broadens the count-in-cells distribution of galaxies for surveys along uncorrelated (well-separated) lines of sight beyond Poisson noise. A number of methods have proposed to measure this excess "cosmic" variance to…

Astrophysics of Galaxies · Physics 2018-11-28 Alex Cameron , Michele Trenti , Rachael Livermore , Cameron van der Velden

Finding a sample of the most massive clusters with redshifts $z>0.6$ can provide an interesting consistency check of the $\Lambda$ cold dark matter ($\Lambda$CDM) model. Here we present results from our search for clusters with $0.6\lesssim…

We present the first constraints on cosmology from the Dark Energy Survey (DES), using weak lensing measurements from the preliminary Science Verification (SV) data. We use 139 square degrees of SV data, which is less than 3\% of the full…

Cosmology and Nongalactic Astrophysics · Physics 2017-05-05 The Dark Energy Survey Collaboration , T. Abbott , F. B. Abdalla , S. Allam , A. Amara , J. Annis , R. Armstrong , D. Bacon , M. Banerji , A. H. Bauer , E. Baxter , M. R. Becker , A. Benoit-Lévy , R. A. Bernstein , G. M. Bernstein , E. Bertin , J. Blazek , C. Bonnett , S. L. Bridle , D. Brooks , C. Bruderer , E. Buckley-Geer , D. L. Burke , M. T. Busha , D. Capozzi , A. Carnero Rosell , M. Carrasco Kind , J. Carretero , F. J. Castander , C. Chang , J. Clampitt , M. Crocce , C. E. Cunha , C. B. D'Andrea , L. N. da Costa , R. Das , D. L. DePoy , S. Desai , H. T. Diehl , J. P. Dietrich , S. Dodelson , P. Doel , A. Drlica-Wagner , G. Efstathiou , T. F. Eifler , B. Erickson , J. Estrada , A. E. Evrard , A. Fausti Neto , E. Fernandez , D. A. Finley , B. Flaugher , P. Fosalba , O. Friedrich , J. Frieman , C. Gangkofner , J. Garcia-Bellido , E. Gaztanaga , D. W. Gerdes , D. Gruen , R. A. Gruendl , G. Gutierrez , W. Hartley , M. Hirsch , K. Honscheid , E. M. Huff , B. Jain , D. J. James , M. Jarvis , T. Kacprzak , S. Kent , D. Kirk , E. Krause , A. Kravtsov , K. Kuehn , N. Kuropatkin , J. Kwan , O. Lahav , B. Leistedt , T. S. Li , M. Lima , H. Lin , N. MacCrann , M. March , J. L. Marshall , P. Martini , R. G. McMahon , P. Melchior , C. J. Miller , R. Miquel , J. J. Mohr , E. Neilsen , R. C. Nichol , A. Nicola , B. Nord , R. Ogando , A. Palmese , H. V. Peiris , A. A. Plazas , A. Refregier , N. Roe , A. K. Romer , A. Roodman , B. Rowe , E. S. Rykoff , C. Sabiu , I. Sadeh , M. Sako , S. Samuroff , C. Sánchez , E. Sanchez , H. Seo , I. Sevilla-Noarbe , E. Sheldon , R. C. Smith , M. Soares-Santos , F. Sobreira , E. Suchyta , M. E. C. Swanson , G. Tarle , J. Thaler , D. Thomas , M. A. Troxel , V. Vikram , A. R. Walker , R. H. Wechsler , J. Weller , Y. Zhang , J. Zuntz

A key science driver for the next generation of wide-field optical and radio surveys is the exploration of the time variable sky. These surveys will have unprecedented sensitivity and areal coverage, but will be limited in their ability to…

Astrophysics of Galaxies · Physics 2013-12-04 G. J. Madsen , B. M. Gaensler

The 6dF Galaxy Survey (6dFGS) aims to measure the redshifts of around 150,000 galaxies, and the peculiar velocities of a 15,000-member sub-sample, over almost the entire southern sky. When complete, it will be the largest redshift survey of…

The Cosmic Evolution Survey (COSMOS) is designed to probe the correlated evolution of galaxies, star formation, active galactic nuclei (AGN) and dark matter (DM) with large-scale structure (LSS) over the redshift range z $> 0.5 $ to 6. The…

The multi-band photometry of the VOICE imaging data, overlapping with 4.9 deg$^2$ of the Chandra Deep Field South (CDFS) area, enables both shape measurement and photometric redshift estimation to be the two essential quantities for weak…

To investigate in more details of Stellar Abundance and Galactic Evolution (SAGE) and in a huge sample, we are performing a northern sky photometric survey named SAGES with the SAGE photometric system, which consists of 8 filters:…

Instrumentation and Methods for Astrophysics · Physics 2019-01-16 Jie Zheng , Gang Zhao , Wei Wang , Zhou Fan , Ke-Feng Tan , Chun Li , Fang Zuo

Key cosmological applications require the three-dimensional galaxy distribution on the entire celestial sphere. These include measuring the gravitational pull on the Local Group, estimating the large-scale bulk flow and testing the…

Cosmology and Nongalactic Astrophysics · Physics 2013-12-18 Maciej Bilicki , Thomas H. Jarrett , John A. Peacock , Michelle E. Cluver , Louise Steward

Systems where multiple sources at different redshifts are strongly lensed by the same deflector allow one to directly investigate the evolution of the angular diameter distances with redshift, and thus to learn about the geometry of the…

Cosmology and Nongalactic Astrophysics · Physics 2024-12-18 A. Bolamperti , C. Grillo , G. B. Caminha , G. Granata , S. H. Suyu , R. Cañameras , L. Christensen , J. Vernet , A. Zanella

We present results on the clustering of 282,068 galaxies in the Baryon Oscillation Spectroscopic Survey (BOSS) sample of massive galaxies with redshifts 0.4<z<0.7 which is part of the Sloan Digital Sky Survey III project. Our results cover…

The PAU Survey (PAUS) is an innovative photometric survey with 40 narrow bands at the William Herschel Telescope (WHT). The narrow bands are spaced at 100\AA\ intervals covering the range 4500\AA\ to 8500\AA\ and, in combination with…