A. Finoguenov
A5024118880- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Astrophysical Phenomena and Observations
- Astrophysics and Cosmic Phenomena
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Astrophysics and Star Formation Studies
- Astronomical Observations and Instrumentation
- Cosmology and Gravitation Theories
- Radio Astronomy Observations and Technology
- Scientific Research and Discoveries
- Calibration and Measurement Techniques
- Adaptive optics and wavefront sensing
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- History and Developments in Astronomy
- Particle Accelerators and Free-Electron Lasers
- Relativity and Gravitational Theory
- Geophysics and Gravity Measurements
- Remote Sensing in Agriculture
- Pulsars and Gravitational Waves Research
- Astro and Planetary Science
- Advanced X-ray Imaging Techniques
- Nuclear Physics and Applications
- Plant Water Relations and Carbon Dynamics
University of Helsinki
2016-2025
Helsinki Institute of Physics
2015-2024
Max Planck Institute for Extraterrestrial Physics
2012-2022
UK Astronomy Technology Centre
2020
Max Planck Society
2006-2019
University of Turku
2019
Campbell Collaboration
2019
Max Planck Institute for Astronomy
2008-2018
Leibniz Institute for Astrophysics Potsdam
1999-2018
Lund Science (Sweden)
2018
The third generation of the Sloan Digital Sky Survey (SDSS-III) took data from 2008 to 2014 using original SDSS wide-field imager, and an upgraded multi-object fiber-fed optical spectrograph, a new near-infrared high-resolution novel interferometer. All SDSS-III are now made public. In particular, this paper describes Data Release 11 (DR11) including all acquired through 2013 July, 12 (DR12) adding July (including included in previous releases), marking end observing. Relative our public...
zCOSMOS is a large-redshift survey that being undertaken in the COSMOS field using 600 hr of observation with VIMOS spectrograph on 8 m VLT. The designed to characterize environments galaxies from 100 kpc scales galaxy groups up Mpc scale cosmic web and produce diagnostic information active galactic nuclei. consists two parts: (1) zCOSMOS-bright, magnitude-limited I-band IAB < 22.5 sample about 20,000 0.1 z 1.2 covering whole 1.7 deg2 ACS field, for which parameters at ~ 0.7 are be directly...
eROSITA (extended ROentgen Survey with an Imaging Telescope Array) is the primary instrument on Spectrum-Roentgen-Gamma (SRG) mission, which was successfully launched July 13, 2019, from Baikonour cosmodrome. After commissioning of and a subsequent calibration performance verification phase, started survey entire sky December 2019. By end 2023, eight complete scans celestial sphere will have been performed, each lasting six months. At this program, all-sky in soft X-ray band (0.2--2.3\,keV)...
We describe redMaPPer, a new red sequence cluster finder specifically designed to make optimal use of ongoing and near-future large photometric surveys. The algorithm has multiple attractive features: (1) it can iteratively self-train the model based on minimal spectroscopic training sample, an important feature for high-redshift (2) It handle complex masks with varying depth. (3) produces cluster-appropriate random points enable large-scale structure studies. (4) All clusters are assigned...
This White Paper, submitted to the recent ESA call for science themes define its future large missions, advocates need a transformational leap in our understanding of two key questions astrophysics: 1) How does ordinary matter assemble into scale structures that we see today? 2) do black holes grow and shape Universe? Hot gas clusters, groups intergalactic medium dominates baryonic content local Universe. To understand astrophysical processes responsible formation assembly these structures,...
The COSMOS-Legacy survey is a 4.6 Ms Chandra program that has imaged 2.2 deg$^2$ of the COSMOS field with an effective exposure $\simeq$160 ks over central 1.5 and $\simeq$80 in remaining area. combination 56 new observations, obtained as X-ray Visionary Project, previous C-COSMOS survey. We describe reduction analysis observations properties 2273 point sources detected above spurious probability 2$\times 10^{-5}$. also present updated data. whole includes 4016 (3814, 2920 2440 full, soft...
The Extended Baryon Oscillation Spectroscopic Survey (eBOSS) will conduct novel cosmological observations using the BOSS spectrograph at Apache Point Observatory. Observations be simultaneous with Time Domain (TDSS) designed for variability studies and Identification of eROSITA Sources (SPIDERS) program X-ray sources. eBOSS use four different tracers to measure distance-redshift relation baryon acoustic oscillations (BAO). Using more than 250,000 new, spectroscopically confirmed luminous red...
The Chandra COSMOS Survey (C-COSMOS) is a large, 1.8 Ms, Chandra} program that has imaged the central 0.5 sq.deg of field (centered at 10h, +02deg) with an effective exposure ~160ksec, and outer 0.4sq.deg. area ~80ksec. limiting source detection depths are 1.9e-16 erg cm(-2) s(-1) in Soft (0.5-2 keV) band, 7.3e(-16) cm^-2 s^-1 Hard (2-10 5.7e(-16) Full (0.5-10 band. Here we describe strategy, design execution C-COSMOS survey, present catalog 1761 point sources detected probability being...
Using HST/WFC3 imaging taken as part of the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS), we examine role that major galaxy mergers play in triggering active galactic nuclei (AGN) activity at z~2. Our sample consists 72 moderate-luminosity (Lx ~ 1E42-1E44 erg/s) AGN 1.5<z<2.5 are selected using 4 Msec Chandra observations Field South, deepest X-ray to date. Employing visual classifications, have analyzed rest-frame optical morphologies host galaxies and compared...
This paper documents the sixteenth data release (DR16) from Sloan Digital Sky Surveys; fourth and penultimate phase (SDSS-IV). is first of southern hemisphere survey Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2); new APOGEE-2 North are also included. DR16 notable as final for main cosmological program Extended Baryon Oscillation Spectroscopic Survey (eBOSS), all raw reduced spectra that project released here. includes Time Domain (TDSS) SPectroscopic IDentification...
We present the first set of XMM-Newton EPIC observations in 2 square degree COSMOS field. The strength project is unprecedented combination a large solid angle and sensitivity over whole multiwavelength spectrum. are very efficient localizing identifying active galactic nuclei (AGN) clusters as well groups galaxies. One primary goals Cosmos survey to study co-evolution function their environment Cosmic web. Here we log observations, images summary research highlights for pass 25 pointings...
We report the final optical identifications of medium-depth (∼60 ks), contiguous (2 deg2) XMM-Newton survey COSMOS field. has detected ∼1800 X-ray sources down to limiting fluxes ∼5 × 10−16, ∼3 10−15, and ∼7 10−15 erg cm−2 s−1 in 0.5–2 keV, 2–10 5–10 keV bands, respectively (∼1 ∼6 ∼1 10−14 s−1, three respectively, over 50% area). The work is complemented by an extensive collection multiwavelength data from 24 μm UV, available survey, for each sources, including spectroscopic redshifts ≳50%...
ABSTRACT We investigate if the discrepancy between estimates of total baryon mass fraction obtained from observations cosmic microwave background (CMB) and galaxy groups/clusters persists when a large sample groups is considered. To this purpose, 91 candidate X-ray groups/poor clusters at redshift 0.1 ⩽ z 1 are selected COSMOS 2 deg survey, based only on their luminosity extent. This complemented by 27 nearby with robust, analogous determination stellar inside R 500 . The 118 spans range in...
Context. The eROSITA X-ray telescope on board the Spectrum-Roentgen-Gamma (SRG) observatory combines a large field of view and collecting area in energy range $\sim$0.2 to $\sim$8.0 keV with capability perform uniform scanning observations sky areas. Aims. SRG/eROSITA performed $\sim$140 square degrees Final Equatorial Depth Survey (eFEDS) as part its performance verification phase. observing time was chosen slightly exceed depth equatorial fields after completion all-sky survey. We present...
The X-ray Integral Field Unit (X-IFU) is the high resolution spectrometer of ESA Athena observatory. Over a field view 5' equivalent diameter, it will deliver spectra from 0.2 to 12 keV with spectral 2.5 eV up 7 on ∼ 5" pixels. X-IFU based large format array super-conducting molybdenum-gold Transition Edge Sensors cooled at 90 mK, each coupled an absorber made gold and bismuth pitch 249 μm. A cryogenic anti-coincidence detector located underneath prime TES enables non background be reduced....
ABSTRACT We present the catalog of optical and infrared counterparts Chandra COSMOS-Legacy Survey, a 4.6 Ms program on 2.2 deg 2 COSMOS field, combination 56 new overlapping observations obtained in Cycle 14 with previous C-COSMOS survey. In this Paper we report i , K 3.6 μ m identifications 2273 X-ray point sources detected observations. use likelihood ratio technique to derive association optical/infrared (IR) for 97% sources. also update information 1743 C-COSMOS, using not available when...
Context. In November 2019, eROSITA on board of the Spektrum-Roentgen-Gamma (SRG) observatory started to map entire sky in X-rays. After four-year survey program, it will reach a flux limit that is about 25 times deeper than ROSAT. During SRG performance verification phase, observed contiguous 140 deg 2 area down final depth all-sky (eROSITA Final Equatorial-Depth Survey; eFEDS), with goal obtaining census X-ray emitting populations (stars, compact objects, galaxies, clusters and active...
We report on the first deep X-ray survey with XMM-Newton observatory during performance verification phase. The field of Lockman Hole, one best studied sky areas over a very wide range wavelengths, has been observed. A total ~100 ksec good exposure time accumulated. Combining images European Photon Imaging Camera (EPIC) detectors we reach flux limit 0.31, 1.4 and , respectively in 0.5-2, 2-10, 5-10 keV band. Within an off-axis angle 10 arcmin detect 148, 112 61 sources, respectively....
We present results on the total mass and temperature determination using two samples of clusters galaxies. One sample is constructed with emphasis completeness sample, while advantage other use profiles, derived ASCA. obtain remarkably similar fits to M-T relation for both samples, normalization slope significantly different from prediction self-similar collapse hydrodynamical simulations. discuss origin these discrepancies also combine X-ray velocity dispersion measurements provide a...
Spatially-resolved gas pressure maps of the Coma galaxy cluster are obtained from a mosaic XMM-Newton observations in scale range between resolution 20 kpc and an extent 2.8 Mpc. A Fourier analysis data reveals presence scale-invariant fluctuation spectrum 40 90 is found to be well described by projected Kolmogorov/Oboukhov-type turbulence spectrum. Deprojection integration yields lower limit ∼10 percent total intracluster medium turbulent form. The results also provide observational...
Measurements of X-ray scaling laws are critical for improving cosmological constraints derived with the halo mass function and understanding physical processes that govern heating cooling intracluster medium. In this paper, we use a sample 206 selected galaxy groups to investigate relation between luminosity (Lx) (M00) where M200 is via stacked weak gravitational lensing. This work draws upon broad array multi-wavelength COSMOS observations including 1.64 square degrees contiguous imaging...
<i>Context. <i/>The COSMOS survey is a multiwavelength aimed to study the evolution of galaxies, AGN and large scale structures. Within this XMM-COSMOS powerful tool detect galaxy clusters. The deep X-ray over full 2 deg<sup>2<sup/> area. It consists 55 XMM-<i>Newton<i/> pointings for total exposure ~1.5 Ms with an average vignetting-corrected depth 40 ks across field view sky coverage 2.13 deg<sup>2<sup/>.<i>Aims. <i/>We present catalogue point-like sources detected EPIC CCD cameras,...
We present point-source catalogs for the ~2 Ms exposure of Chandra Deep Field-South (CDF-S); this is one two most-sensitive X-ray surveys ever performed. The survey covers an area ~436 arcmin^2 and reaches on-axis sensitivity limits ~1.9x10^{-17} ~1.3x10^{-16} ergs/cm^2/s 0.5-2.0 2-8 keV bands, respectively. Four hundred sixty-two point sources are detected in at least three bands that were searched; 135 these new compared to previous ~1 CDF-S detections. Source positions determined using...