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The ultraviolet (UV) to sub-millimetre (submm) spectral energy distribution of galaxies can be roughly divided into two sections: the stellar emission (attenuated by dust) at UV to near-infrared wavelengths and dust emission at longer…

星系天体物理 · 物理学 2021-11-10 Wouter Dobbels , Maarten Baes

We present a new infrared survey covering the three Euclid deep fields and four other Euclid calibration fields using Spitzer's Infrared Array Camera (IRAC). We have combined these new observations with all relevant IRAC archival data of…

星系天体物理 · 物理学 2022-03-14 Andrea Moneti , H. J. McCracken , M. Shuntov , O. B. Kauffmann , P. Capak , I. Davidzon , O. Ilbert , C. Scarlata , S. Toft , J. Weaver , R. Chary , J. Cuby , A. L. Faisst , D. C. Masters , C. McPartland , B. Mobasher , D. B. Sanders , R. Scaramella , D. Stern , I. Szapudi , H. Teplitz , L. Zalesky , A. Amara , N. Auricchio , C. Bodendorf , D. Bonino , E. Branchini , S. Brau-Nogue , M. Brescia , J. Brinchmann , V. Capobianco , C. Carbone , J. Carretero , F. J. Castander , M. Castellano , S. Cavuoti , A. Cimatti , R. Cledassou , G. Congedo , C. J. Conselice , L. Conversi , Y. Copin , L. Corcione , A. Costille , M. Cropper , A. Da Silva , H. Degaudenzi , M. Douspis , F. Dubath , C. A. J. Duncan , X. Dupac , S. Dusini , S. Farrens , S. Ferriol , P. Fosalba , M. Frailis , E. Franceschi , M. Fumana , B. Garilli , B. Gillis , C. Giocoli , B. R. Granett , A. Grazian , F. Grupp , S. V. H. Haugan , H. Hoekstra , W. Holmes , F. Hormuth , P. Hudelot , K. Jahnke , S. Kermiche , A. Kiessling , M. Kilbinger , T. Kitching , R. Kohley , M. Kuemmel , M. Kunz , H. Kurki-Suonio , S. Ligori , P. B. Lilje , I. Lloro , E. Maiorano , O. Mansutti , O. Marggraf , K. Markovic , F. Marulli , R. Massey , S. Maurogordato , M. Meneghetti , E. Merlin , G. Meylan , M. Moresco , L. Moscardini , E. Munari , S. M. Niemi , C. Padilla , S. Paltani , F. Pasian , K. Pedersen , S. Pires , M. Poncet , L. Popa , L. Pozzetti , F. Raison , R. Rebolo , J. Rhodes , H. Rix , M. Roncarelli , E. Rossetti , R. Saglia , P. Schneider , A. Secroun , G. Seidel , S. Serrano , C. Sirignano , G. Sirri , L. Stanco , P. Tallada-Crespi , A. N. Taylor , I. Tereno , R. Toledo-Moreo , F. Torradeflot , Y. Wang , N. Welikala , J. Weller , G. Zamorani , J. Zoubian , S. Andreon , S. Bardelli , S. Camera , J. Gracia-Carpio , E. Medinaceli , S. Mei , G. Polenta , E. Romelli , F. Sureau , M. Tenti , T. Vassallo , A. Zacchei , E. Zucca , C. Baccigalupi , A. Balaguera-Antolinez , F. Bernardeau , A. Biviano , M. Bolzonella , E. Bozzo , C. Burigana , R. Cabanac , A. Cappi , C. S. Carvalho , S. Casas , G. Castignani , C. Colodro-Conde , J. Coupon , H. M. Courtois , D. Di Ferdinando , M. Farina , F. Finelli , P. Flose-Reimberg , S. Fotopoulou , S. Galeotta , K. Ganga , J. Garcia-Bellido , E. Gaztanaga , G. Gozaliasl , I. Hook , B. Joachimi , V. Kansal , E. Keihanen , C. C. Kirkpatrick , V. Lindholm , G. Mainetti , D. Maino , R. Maoli , M. Martinelli , N. Martinet , M. Maturi , R. B. Metcalf , G. Morgante , N. Morisset , A. Nucita , L. Patrizii , D. Potter , A. Renzi , G. Riccio , A. G. Sanchez , D. Sapone , M. Schirmer , M. Schultheis , V. Scottez , E. Sefusatti , R. Teyssier , O. Tubio , I. Tutusaus , J. Valiviita , M. Viel , H. Hildebrandt

A precise measure of the mid-infrared interstellar extinction law is crucial to the investigation of the properties of interstellar dust, especially of the grains in the large size end. Based on the stellar parameters derived from the…

星系天体物理 · 物理学 2016-11-10 Mengyao Xue , Biwei Jiang , Jian Gao , Jiaming Liu , Shu Wang , Aigen Li

We report mid-infrared observations of SGR 1806-20 and its environment - with the highest spatial resolution in this domain to date - using ESO/VISIR in 2005 and 2006, and we retrieved Spitzer/IRAC-MIPS archival data of the same field. We…

天体物理学 · 物理学 2009-11-13 F. Rahoui , S. Chaty , P. O. Lagage

Multiple imputation (MI) is a popular approach for dealing with missing data arising from non-response in sample surveys. Multiple imputation by chained equations (MICE) is one of the most widely used MI algorithms for multivariate data,…

机器学习 · 计算机科学 2022-03-22 Zhenhua Wang , Olanrewaju Akande , Jason Poulos , Fan Li

The two currently largest all-sky photometric datasets, WISE and SuperCOSMOS, were cross-matched by Bilicki et al. (2016) (B16) to construct a novel photometric redshift catalogue on 70% of the sky. Galaxies were therein separated from…

星系天体物理 · 物理学 2016-11-30 T. Krakowski , K. Małek , M. Bilicki , A. Pollo , M. Krupa , A. Kurcz

While searches for young stellar objects (YSOs) with the Spitzer Space Telescope focused on known molecular clouds, photometry from the Wide-field Infrared Survey Explorer (WISE) can be used to extend the search to the entire sky. As a…

太阳与恒星天体物理 · 物理学 2016-02-03 William J. Fischer , Deborah L. Padgett , Karl R. Stapelfeldt

We present a search for debris discs amongst M-dwarf members of nearby, young (5-150 Myr) moving groups (MGs) using infrared (IR) photometry, primarily from the Wide Infrared Survey Explorer (WISE). A catalogue of 100 MG M-dwarfs that have…

太阳与恒星天体物理 · 物理学 2017-05-31 Alex S. Binks , Robin D. Jeffries

With the rise of tiny IoT devices powered by machine learning (ML), many researchers have directed their focus toward compressing models to fit on tiny edge devices. Recent works have achieved remarkable success in compressing ML models for…

计算机视觉与模式识别 · 计算机科学 2024-08-09 Brendan Reidy , Sepehr Tabrizchi , Mohamadreza Mohammadi , Shaahin Angizi , Arman Roohi , Ramtin Zand

Understanding plant root systems is critical for advancing research in soil-plant interactions, nutrient uptake, and overall plant health. However, accurate imaging of roots in subterranean environments remains a persistent challenge due to…

计算机视觉与模式识别 · 计算机科学 2026-01-12 Shubham Agarwal , Ofek Nourian , Michael Sidorov , Sharon Chemweno , Ofer Hadar , Naftali Lazarovitch , Jhonathan E. Ephrath

We present measurements of the stellar mass fractions ($f_\star$) for a sample of high-redshift ($0.93 \le z \le 1.32$) infrared-selected galaxy clusters from the Massive and Distant Clusters of WISE Survey (MaDCoWS) and compare them to the…

We describe a methodology to classify periodic variable stars identified using photometric time-series measurements constructed from the Wide-field Infrared Survey Explorer (WISE) full-mission single-exposure Source Databases. This will…

天体物理仪器与方法 · 物理学 2015-06-18 Frank J. Masci , Douglas I. Hoffman , Carl J. Grillmair , Roc M. Cutri

We evaluate the performance of four different machine learning (ML) algorithms: an Artificial Neural Network Multi-Layer Perceptron (ANN MLP ), Adaboost, Gradient Boosting Classifier (GBC), XGBoost, for the separation of pulsars from radio…

天体物理仪器与方法 · 物理学 2018-03-06 Suryarao Bethapudi , Shantanu Desai

Analysis of microwave sky signals, such as the cosmic microwave background, often requires component separation with multi-frequency methods, where different signals are isolated by their frequency behaviors. Many so-called "blind" methods,…

宇宙学与河外天体物理 · 物理学 2024-08-02 Fiona McCarthy , J. Colin Hill , William R. Coulton , David W. Hogg

The last few decades have witnessed a growing interest in location-based services. Using localization systems based on Radio Frequency (RF) signals has proven its efficacy for both indoor and outdoor applications. However, challenges remain…

系统与控制 · 电气工程与系统科学 2020-12-22 Daoud Burghal , Ashwin T. Ravi , Varun Rao , Abdullah A. Alghafis , Andreas F. Molisch

Machine learning (ML) methods are ubiquitous in wireless communication systems and have proven powerful for applications including radio-frequency (RF) fingerprinting, automatic modulation classification, and cognitive radio. However, the…

信号处理 · 电气工程与系统科学 2021-06-29 Hsuan-Tung Peng , Joshua Lederman , Lei Xu , Thomas Ferreira de Lima , Chaoran Huang , Bhavin Shastri , David Rosenbluth , Paul Prucnal

Aims. We present the results from a comprehensive spectroscopic survey of the WINGS (WIde-field Nearby Galaxy-cluster Survey) clusters, a program called WINGS-SPE. The WINGS-SPE sample consists of 48 clusters, 22 of which are in the…

The Spitzer Space Telescope is pushing into new frontiers in high redshift astronomy. Closer to home, Spitzer is making an equally large impact on our understanding of galaxy formation and evolution. In this contribution we present…

天体物理学 · 物理学 2007-05-23 Daniel A. Dale , the SINGS Team

While microlensing is very rare, occurring on average once per million stars observed, current and near-future surveys are coming online with the capability of providing photometry of almost the entire visible sky to depths up to R ~ 22 mag…

天体物理仪器与方法 · 物理学 2020-04-30 D. Godines , E. Bachelet , G. Narayan , R. A. Street

We report the discovery of 87 new T dwarfs uncovered with the Wide-field Infrared Survey Explorer (WISE) and three brown dwarfs with extremely red near-infrared colors that exhibit characteristics of both L and T dwarfs. Two of the new T…