A5107006836- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astrophysical Phenomena and Observations
- Astrophysics and Star Formation Studies
- Astronomical Observations and Instrumentation
- Scientific Research and Discoveries
- Impact of Light on Environment and Health
- CCD and CMOS Imaging Sensors
- Geophysics and Gravity Measurements
- Remote Sensing in Agriculture
- Cosmology and Gravitation Theories
- Gamma-ray bursts and supernovae
- Astrophysics and Cosmic Phenomena
- Gas Dynamics and Kinetic Theory
- Aeolian processes and effects
- Atmospheric Ozone and Climate
- Phase Equilibria and Thermodynamics
- Spectroscopy and Chemometric Analyses
- Plant Water Relations and Carbon Dynamics
- Adaptive optics and wavefront sensing
- Spectroscopy and Laser Applications
European Southern Observatory
2005-2024
Excellence Cluster Universe
2014-2020
Technical University of Munich
2014
Max Planck Institute for Extraterrestrial Physics
2004-2010
Max Planck Society
2004-2009
By compiling a comprehensive census of literature studies, we investigate the evolution Main Sequence (MS) star-forming galaxies (SFGs) in widest range redshift ($0 < z 6$) and stellar mass ($10^{8.5}-10^{11.5}$ $M_{\odot}$) ever probed. We convert all observations to common calibration find remarkable consensus on variation MS shape normalization across cosmic time. The relation exhibits curvature towards high masses at redshifts. best functional form is governed by two parameters:...
By using a set of different SFR indicators, including WISE mid-infrared and Halpha emission, we study the slope Main Sequence (MS) local star forming galaxies at stellar masses larger than 10^{10} M_{\odot}. The relation strongly depends on indicator used. In all cases, MS shows bending high with respect to obtained in low mass regime. While distribution upper envelope is consistent log-normal distribution, lower an excess galaxies, which increases as function but varies scatter best from...
We use the RASS-SDSS galaxy cluster sample to compare quality of optical and X-ray luminosities as predictors other properties such their masses, temperatures, velocity dispersions. SDSS spectroscopic data estimate dispersions virial masses a subsample 69 clusters within r_{500} r_{200}. The ASCA temperature intra-cluster medium, T_X, is retrieved from literature for 49 clusters. For this we also by using mass-temperature relation. show that luminosity, L_{op}, correlates with mass much...
We analyze the Luminosity Functions (LFs) of a subsample 69 clusters from RASS-SDSS galaxy cluster catalog. When calculated within physical sizes, given by r200 or r500, all LFs appear to have same shape, well fitted composite two Schechter functions with marked upturn and steepening at faint-end. Previously reported cluster-to-cluster variations LF faint-end slope are due use metric aperture for computing different masses. determine early- late-type galaxies, where typing is based on...
For a detailed comparison of the appearance cluster galaxies in X-rays and optical, we have compiled comprehensive database X-ray optical properties sample clusters based on largest available surveys: ROSAT All Sky Survey (RASS) Sloan Digital (SDSS). The galaxy this RASS-SDSS catalog cover wide range masses, from groups 10^{12.5} solar masses to massive 10^{15} redshift 0.002 0.45. comprises all selected objects already observed by (114 clusters). each system uniformly determined properties....
We explore the mass-to-light ratio in galaxy clusters and its relation to cluster mass. study relations among optical luminosity ($L_{op}$), mass ($M_{200}$) number of galaxies within $r_{200}$ ($N_{gal}$) a sample 217 with confirmed 3D overdensity. correct for projection effects, by determining surface density profile our sample. This is best fitted cored King low intermediate systems. The core radius decreases mass, and, highest clusters, better represented generalized or cuspy Navarro,...
We constructed the composite luminosity function (LF) of clusters galaxies in five SDSS photometric bands u, g, r, i and z from RASS-SDSS galaxy cluster catalog. Background foreground are subtracted using both a local global background correction to take account presence large scale structures field variations, respectively. The LF clearly shows two components: bright-end with classical slope –1.25 each band, steeper faint-end () dwarf region. observed upturn faint has location ranging g...
We study the relationship between structure and star-formation rate (SFR) of X-ray selected low moderate luminosity active galactic nuclei (AGNs) in two Chandra Deep Fields, using Hubble Space Telescope imaging from Cosmic Assembly Near Infrared Extragalactic Legacy Survey (CANDELS) deep far-infrared maps PEP+GOODS-Herschel survey. derive detailed distributions structural parameters FIR luminosities carefully constructed control samples galaxies, which we then compare to those AGNs. At z~1,...
ABSTRACT In this work, we analyse the connection between gas availability and position of a region with respect to spatially resolved main-sequence (MS) relation. Following procedure presented in Enia et al. (2020), for sample five face-on, grand design spiral galaxies located on MS obtain estimates stellar mass star formation rate surface densities (Σ⋆ ΣSFR) within cells 500 pc size. Thanks H i 21cm 12CO(2–1) maps comparable resolution, same estimate atomic (ΣH i) molecular ($\Sigma _{\rm...
We apply a stacking technique to gain enough statistics detect the hot CGM around galaxies. use X-ray data from first four SRG/eROSITA all-sky surveys (eRASS:4). discuss how satellite galaxies could bias and carefully build central galaxy samples based on SDSS spectroscopic survey halo-based group finder algorithm isolated sample ninth release of DESI Legacy (LS DR9, photometric). mask detected point sources model emission unresolved active galactic nuclei (AGN) binaries (XRB) obtain CGM....
Aims.In this paper we consider a large sample of optically selected clusters, in order to elucidate the physical reasons for existence X-ray underluminous clusters.
Context.Some previous investigations have found that the fraction (fAGN) of active galactic nuclei (AGNs) is lower in clusters than field. This can result from suppression galaxy–galaxy mergers high-velocity dispersion () clusters, if formation and/or fueling AGNs directly related to merging process.
By using the deepest available mid and far infrared surveys in CANDELS, GOODS COSMOS fields we study evolution of Main Sequence (MS) star forming galaxies (SFGs) from z~0 to` ~2.5 at stellar masses larger than 10^{10} M_{\odot}. The MS slope scatter are consistent with a re-scaled version local relation distribution, shifted higher values SFR according to ~(1+z)^{3.2}. exhibits bending high mass end slightly increasing as function mass. We show that previously reported slope, considered...
We use a sample built on the SDSS DR7 catalogue and bulge-disc decomposition of Simard et al. (2011) to study how bulge disc components contribute parent galaxy's star formation activity, by determining its position in rate (SFR) - stellar mass (M$_{\star}$) plane at 0.02$<z<$0.1. colours as proxy for their SFRs. mean galaxy bulge-total ratio (B/T) function residual from MS ($\Delta_{MS}$) find that B/T-$\Delta_{MS}$ relation exhibits parabola-like shape with peak corresponding lowest B/Ts...
We analyse the spatially resolved relation between stellar mass (M$_{\star}$) and star formation rate (SFR) in disk galaxies (i.e. Main Sequence, MS). The studied sample includes eight nearby face-on grand-design spirals, e.g. descendant of high-redshift, rotationally-supported star-forming galaxies. exploit photometric information over 23 bands, from UV to far-IR, publicly available DustPedia database build maps rates on sub-galactic scales 0.5-1.5 kpc, by performing a spectral energy...
We analyze a complete spectroscopic sample of galaxies ($\sim$600,000 ) drawn from Sloan Digital Sky Survey (SDSS, DR7) to look for evidence galactic winds in the local Universe. focus on shape [OIII]$λ$5007 emission line as tracer ionizing gas outflows. stack our spectra fine grid star formation rate (SFR) and stellar mass dependence position SFR versus diagram. do not find any significant broad shifted which we interpret no outflowing ionized global population. have also classified these...
We investigate the impact of AGN feedback, on entropy and characteristic temperature measurements galaxy groups detected in SRG/eROSITA's first All-Sky Survey (eRASS1) to shed light characteristics feedback mechanisms. analyze deeper eROSITA observations 1178 eRASS1. divide sample into 271 subsamples extract average thermodynamic properties, including electron density, temperature, at three radii along with integrated by jointly analyzing X-ray images spectra following a Bayesian approach....
The question of how much gas cools in the cores clusters galaxies has been focus many, multiwavelength studies past 30 years. In this letter we present first detections strongest atomic cooling lines, [C II], [O I] and [N two strong flow clusters, A1068 A2597, using Herschel PACS. These spectra indicate that substantial mass cold molecular (>10^9 Mo) known to be these systems is being irradiated by intense UV radiation, most probably from young stars. line widths FIR lines they share...
We present the brightest cluster galaxies (BCGs) catalog for SPectroscoic IDentification of eROSITA Sources (SPIDERS) DR14 program value-added catalog. list 416 BCGs identified as part this process, along with their stellar mass, star formation rates, and morphological properties. based on available spectroscopic data from SPIDERS photometric SDSS. computed masses SFRs basis SDSS, WISE, GALEX photometry using spectral energy distribution fitting. Morphological properties all were derived by...
We aim at quantifying the relationships between star formation in cluster galaxies and global properties. Using a subsample of 79 nearby clusters from RASS-SDSS galaxy catalogue Popesso et al. (2005, A&A, 433, 431), we perform regression analysis integrated rate (), total stellar mass fractions forming (fSF) blue (fb) other properties, namely its richness (Ngal, i.e. number members within virial radius, corrected for incompleteness), velocity dispersion (M200), X-ray luminosity (LX). All...