A5059953261- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Adaptive optics and wavefront sensing
- Astrophysical Phenomena and Observations
- Astrophysics and Star Formation Studies
- Astronomical Observations and Instrumentation
- Cosmology and Gravitation Theories
- Scientific Research and Discoveries
- Astrophysics and Cosmic Phenomena
- Remote Sensing in Agriculture
- Advanced Image Processing Techniques
- Radio Astronomy Observations and Technology
- Impact of Light on Environment and Health
- Dark Matter and Cosmic Phenomena
- CCD and CMOS Imaging Sensors
- Spectroscopy and Chemometric Analyses
- Pulsars and Gravitational Waves Research
- Astro and Planetary Science
- Reservoir Engineering and Simulation Methods
- Statistical and numerical algorithms
- Geophysics and Gravity Measurements
- Advanced Vision and Imaging
- Spectroscopy and Laser Applications
Max Planck Institute for Extraterrestrial Physics
2013-2023
Ludwig-Maximilians-Universität München
2013-2023
Stuttgart Observatory
2009-2018
Bayerische Staatssammlung für Paläontologie und Geologie
2008-2018
Institut für Urheber- und Medienrecht
2018
Federal Foreign Office
2001-2015
Max Planck Society
1995-2015
Optica
2003-2015
Max Planck Institute for Astrophysics
1994-2014
Trinity House
2014
The Cluster Lensing And Supernova survey with Hubble (CLASH) is a 524-orbit multi-cycle treasury program to use the gravitational lensing properties of 25 galaxy clusters accurately constrain their mass distributions. survey, described in detail this paper, will definitively establish degree concentration dark matter cluster cores, key prediction CDM. CLASH sample larger and less biased than current samples space-based imaging studies similar depth, as we have minimized lensing-based...
We present the KMOS^3D survey, a new integral field survey of over 600 galaxies at 0.7<z<2.7 using KMOS Very Large Telescope (VLT). The utilizes synergies with multi-wavelength ground and space-based surveys to trace evolution spatially-resolved kinematics star formation from homogeneous sample 5 Gyrs cosmic history. Targets, drawn mass-selected parent 3D-HST cover formation-stellar mass ($M_*$) rest-frame $(U-V)-M_*$ planes uniformly. describe selection targets, observations, data...
We present a candidate for the most distant galaxy known to date with photometric redshift of z = 10.7+0.6−0.4 (95% confidence limits; < 9.5 galaxies types ruled out at 7.2σ). This J-dropout Lyman break galaxy, named MACS0647-JD, was discovered as part Cluster Lensing and Supernova survey Hubble (CLASH). observe three magnified images this due strong gravitational lensing by cluster MACSJ0647.7+7015 0.591. The are factors ∼80, 7, 2, brighter two observed ∼26th magnitude AB (∼0.15 μJy) in...
We present a joint shear-and-magnification weak-lensing analysis of sample 16 X-ray-regular and 4 high-magnification galaxy clusters at 0.19 ≲ z 0.69 selected from the Cluster Lensing And Supernova survey with Hubble (CLASH). Our uses wide-field multi-color imaging, taken primarily Suprime-Cam on Subaru Telescope. From stacked-shear-only X-ray-selected subsample, we detect ensemble-averaged lensing signal total signal-to-noise ratio ≃ 25 in radial range 200–3500 kpc h−1, providing integrated...
Growing observational evidence now indicates that nebular line emission has a significant impact on the rest-frame optical fluxes of z~5-7 galaxies observed with Spitzer. This makes appear more massive, lower specific star formation rates. However, corrections for this have been very difficult to perform reliably due huge uncertainties overall strength such at z>~5.5. Here, we present most direct yet ubiquitous high-EW [OIII]+Hbeta in Lyman-break z~7, while also presenting strategy an...
We constrain the mass–richness scaling relation of redMaPPer galaxy clusters identified in Dark Energy Survey Year 1 data using weak gravitational lensing. split into 4 × 3 bins richness λ and redshift |$z$| for ≥ 20 0.2 ≤ 0.65 measure mean masses these their stacked lensing signal. By modelling as 〈M200m|λ, |$z$|〉 = M0(λ/40)F((1 + |$z$|)/1.35)G, we normalization at 5.0 per cent level, finding M0 [3.081 ± 0.075(stat) 0.133(sys)] · 1014 M⊙ 40 0.35. The recovered index is F 1.356 0.051 (stat)...
We perform a strong-lensing analysis of the merging galaxy cluster MACS J0416.1-2403 (M0416; z=0.42) in recent CLASH/HST observations. identify 70 new multiple images and candidates 23 background sources range 0.7<z_{phot}<6.14 including two probable high-redshift dropouts, revealing highly elongated lens with axis ratio ~5:1, major ~100\arcsec (z_{s}~2). Compared to other well-studied clusters, M0416 shows an enhanced lensing efficiency. Although critical area is not particularly large...
This work aims to study the distribution of luminous and dark matter in Coma early-type galaxies. Dynamical masses obtained under assumption that mass follows light do not match with strong gravitational lens systems similar velocity dispersions. Instead, dynamical fits haloes are good agreement lensing results. We derive mass-to-light ratios stellar populations from Lick absorption line indices, reproducing well observed galaxy colours. Even models amount increases more rapidly dispersion...
We present results from a study of the photometric redshift performance Dark Energy Survey (DES), using early data Science Verification period observations in late 2012 and 2013 that provided science-quality images for almost 200 sq. deg. at nominal depth survey. assess (photo-z) about 15 000 galaxies with spectroscopic redshifts available other surveys. These are used, different configurations, as calibration sample, photo-z's obtained studied most existing photo-z codes. A weighting method...
We utilise a two-color Lyman-Break selection criterion to search for z~9-10 galaxies over the first 19 clusters in CLASH program. A systematic yields three candidates. While we have already reported most robust of these candidates, MACS1149-JD, two additional z~9 candidates are also found and H_{160}-band magnitudes ~26.2-26.9. careful assessment various sources contamination suggests <~1 contaminants our selection. To determine implications results LF SFR density at z~9, introduce new...
We present a new determination of the concentration–mass (c–M) relation for galaxy clusters based on our comprehensive lensing analysis 19 X-ray selected from Cluster Lensing and Supernova Survey with Hubble (CLASH). Our sample spans redshift range between 0.19 0.89. combine weak-lensing constraints Space Telescope (HST) ground-based wide-field data strong HST. The results are reconstructions surface-mass density all CLASH multi-scale grids. derivation Navarro–Frenk–White parameters yields...
We precisely constrain the inner mass profile of Abell 2261 (z=0.225) for first time and determine this cluster is not "over-concentrated" as found previously, implying a formation in agreement with ΛCDM expectations. These results are based on strong lensing analyses new 16-band HST imaging obtained part Cluster Lensing Supernova survey Hubble (CLASH). Combining revised weak Subaru wide field 5-band + KPNO photometry, we place tight constraints halo virial M_vir = 2.2\pm0.2\times10^15...
We present an analysis of the MUSIC-2 N-body/hydrodynamical simulations aimed at estimating expected concentration–mass relation for CLASH (Cluster Lensing and Supernova Survey with Hubble) cluster sample. study nearly 1,400 halos simulated high spatial mass resolution. shape both their density surface-density profiles fit them a variety radial functions, including Navarro–Frenk–White (NFW), generalized NFW, Einasto profiles. derive concentrations masses from these fits. produce Chandra...
ABSTRACT We present measurements of the [N ii ]/H α ratio as a probe gas-phase oxygen abundance for sample 419 star-forming galaxies at z = 0.6–2.7 from KMOS 3D near-IR multi-integral field unit (IFU) survey. The mass–metallicity relation (MZR) is determined consistently with same selection, metallicity tracer, and methodology over wide redshift range probed by find good agreement long-slit surveys in literature, except low-mass slope <?CDATA $z\sim 2.3$?> , where this less biased than...
We use an unprecedented data-set of about 600 redshifts for cluster members, obtained as part a VLT/VIMOS large programme, to constrain the mass profile z=0.44 MACS J1206.2-0847 over radial range 0-5 Mpc (0-2.5 virial radii) using MAMPOSSt and Caustic methods. then add external constraints from our previous gravitational lensing analysis. invert Jeans equation obtain velocity-anisotropy profiles members. With mass-density we first determination pseudo-phase-space density profile. The...
We perform a comprehensive study of the total mass distribution galaxy cluster RXCJ2248 ($z=0.348$) with set high-precision strong lensing models, which take advantage extensive spectroscopic information on many multiply lensed systems. In effort to understand and quantify inherent systematics in parametric modelling, we explore collection 22 models where use different samples multiple image families, parametrizations cosmological parameters. As input for CLASH HST imaging data follow-up...
We derive an accurate mass distribution of the galaxy cluster MACS J1206.2-0847 (z=0.439) from a combined weak-lensing distortion, magnification, and strong-lensing analysis wide-field Subaru BVRIz' imaging our recent 16-band Hubble Space Telescope observations taken as part Cluster Lensing And Supernova survey with (CLASH) program. find good agreement in regions overlap between several weak strong lensing reconstructions using wide variety modeling methods, ensuring consistency. The data...
We utilize 16 band Hubble Space Telescope (HST) observations of 18 lensing clusters obtained as part the Cluster Lensing And Supernova survey with (CLASH) Multi-Cycle Treasury program to search for $z\sim6-8$ galaxies. report discovery 204, 45, and 13 Lyman-break galaxy candidates at $z\sim6$, $z\sim7$, $z\sim8$, respectively, identified from purely photometric redshift selections. This large sample, representing nearly an order magnitude increase in number magnified star-forming galaxies...
We present the weak lensing analysis of Wide-Field Imager SZ Cluster galaxy (WISCy) sample, a set 12 clusters galaxies selected for their Sunyaev-Zel'dovich (SZ) effect. After developing new and improved methods background selection determination geometric scaling factors from absolute multi-band photometry in cluster fields, we compare mass estimate with public X-ray data. find consistency hydrostatic masses no significant bias, dependent bias less than 20% intrinsic scatter constrain...
We present profiles of temperature (Tx), gas mass, and hydrostatic mass estimated from new archival X-ray observations CLASH clusters. compare measurements derived XMM Chandra with one another both to gravitational lensing HST ground-based data. Radial electron density enclosed are nearly identical, indicating that differences in masses inferred arise Tx measurements. Encouragingly, cluster Txs consistent at ~100-200 kpc radii but systematically decline relative larger radii. The angular...
We present the correlations between stellar mass, star formation rate (SFR) and [NII]/Ha flux ratio as indicator of gas-phase metallicity for a sample 222 galaxies at 0.8 < z 2.6 log(M*/Msun)=9.0-11.5 from LUCI, SINS/zC-SINF KMOS3D surveys. This provides unique analysis mass-metallicity relation (MZR) over an extended redshift range using consistent data techniques strong-line indicator. find constant slope low-mass end can fully describe its evolution through characteristic turnover mass...
We investigate the stellar mass and baryonic Tully-Fisher relations (TFRs) of massive star-forming disk galaxies at redshift z~2.3 z~0.9 as part KMOS^3D integral field spectroscopy survey. Our spatially resolved data allow reliable modelling individual galaxies, including effect pressure support on inferred gravitational potential. At fixed circular velocity, we find higher masses similar compared to z~0.9. Together with decreasing gas-to-stellar ratios redshift, this implies that...
We present density split statistics, a framework that studies lensing and counts-in-cells as function of foreground galaxy density, thereby providing large-scale measurement both 2-point 3-point statistics. Our method extends our earlier work on trough is summarized follows: given (low redshift) population galaxies, we divide the sky into subareas equal size but distinct density. then measure around uniformly spaced points separately in each these subareas, well statistics (CiC). The signals...