Nir Mandelker
YOU?
Author Swipe
View article: Statistical Properties of Cold Streams In Massive Star-Forming Halos in IllustrisTNG-50
Statistical Properties of Cold Streams In Massive Star-Forming Halos in IllustrisTNG-50 Open
Cold, dense streams of gas are predicted to penetrate deeply into massive halos (> 10^12 Msun) at cosmic noon (z=4-2), fueling galaxies to sustain high star formation rates. We investigate the prevalence of such cold streams in IllustrisTN…
View article: Radial transport in high-redshift disk galaxies dominated by inflowing streams
Radial transport in high-redshift disk galaxies dominated by inflowing streams Open
Aims. We study the radial transport of cold gas within simulated disk galaxies at cosmic noon. Our aim is to determine whether disk instability or accretion along cold streams from the cosmic web is the driving mechanism behind the transpo…
View article: From FFB starbursts at cosmic dawn to quenching at cosmic morning: Hi-z galaxy bimodality
From FFB starbursts at cosmic dawn to quenching at cosmic morning: Hi-z galaxy bimodality Open
We propose a mass-dependent bimodality in the early evolution of galaxies. The massive track connects the superbright galaxies at cosmic dawn ($z \!>\!8$) to the supermassive quiescent galaxies and black holes (BHs) at cosmic morning ($…
View article: Impact of Cosmic Filaments on Galaxy Morphological Evolution and Predictions of Early Cosmic Web Structure for Roman
Impact of Cosmic Filaments on Galaxy Morphological Evolution and Predictions of Early Cosmic Web Structure for Roman Open
We leverage the IllustrisTNG cosmological simulations to test how the large-scale cosmic web shapes galaxy morphology and to forecast the early cosmic web structure that the Nancy Grace Roman Space Telescope will reveal. In the hydrodynami…
View article: From FFB Starbursts at Cosmic Dawn to Quenching at Cosmic Morning: Hi-z Galaxy Bimodality
From FFB Starbursts at Cosmic Dawn to Quenching at Cosmic Morning: Hi-z Galaxy Bimodality Open
We propose a mass-dependent bimodality in the early evolution of galaxies. The massive track connects the super-bright galaxies at cosmic dawn ($z > 8$) to the super-massive quiescent galaxies and black holes (BHs) at cosmic morning ($z \s…
View article: CHILES. IX. Observational and Simulated H <scp>i</scp> Content and Star Formation of Blue Galaxies in Different Cosmic Web Environments
CHILES. IX. Observational and Simulated H <span>i</span> Content and Star Formation of Blue Galaxies in Different Cosmic Web Environments Open
We examine the redshift evolution of the relationship between the neutral atomic hydrogen (H i ) content and star formation properties of blue galaxies, along with their location in the cosmic web. Using the COSMOS H i Large Extragalactic …
View article: Tales of tension: magnetized infalling cold clouds and streams in the CGM
Tales of tension: magnetized infalling cold clouds and streams in the CGM Open
The observed star formation and wind outflow rates in galaxies suggest cold gas must be continually replenished via infalling clouds or streams. Previous studies have highlighted the importance of cooling-induced condensation on such gas, …
View article: Origin of compressive turbulence in protoclumps in high redshift disks
Origin of compressive turbulence in protoclumps in high redshift disks Open
Context . The giant star-forming clumps in gas-rich high-redshift disks are commonly assumed to form due to gravitational instabilities, in which protoclumps have a Toomre- Q parameter less than unity. However, some cosmological simulation…
View article: CHILES IX: Observational and Simulated HI Content and Star Formation of Blue Galaxies in Different Cosmic Web Environments
CHILES IX: Observational and Simulated HI Content and Star Formation of Blue Galaxies in Different Cosmic Web Environments Open
We examine the redshift evolution of the relationship between the neutral atomic hydrogen ({\HI}) content and star-formation properties of blue galaxies, along with their location in the cosmic web. Using the COSMOS {\HI} Large Extragalact…
View article: FEASTS Combined with Interferometry. III. The Low Column Density H <scp>i</scp> Around M51 and Possibility of Turbulent-mixing Gas Accretion
FEASTS Combined with Interferometry. III. The Low Column Density H <span>i</span> Around M51 and Possibility of Turbulent-mixing Gas Accretion Open
With a new joint-deconvolution pipeline, we combine the single-dish and interferometric atomic hydrogen (H i ) data of M51 observed by the Five-hundred-meter Aperture Spherical radio Telescope (FAST) (FEASTS program) and the Very Large Arr…
View article: Tales of Tension: Magnetized Infalling Clouds and Cold Streams in the CGM
Tales of Tension: Magnetized Infalling Clouds and Cold Streams in the CGM Open
The observed star formation and wind outflow rates in galaxies suggest cold gas must be continually replenished via infalling clouds or streams. Previous studies have highlighted the importance of cooling-induced condensation on such gas, …
View article: FEASTS Combined with Interferometry. III. The Low Column Density HI Around M51 and Possibility of Turbulent-mixing Gas Accretion
FEASTS Combined with Interferometry. III. The Low Column Density HI Around M51 and Possibility of Turbulent-mixing Gas Accretion Open
With a new joint-deconvolution pipeline, we combine the single-dish and interferometric atomic hydrogen (HI) data of M51 observed by the Five-hundred-meter Aperture Spherical radio Telescope (FAST) (FEASTS program) and the Very Large Array…
View article: Growth of massive black holes in FFB galaxies at cosmic dawn
Growth of massive black holes in FFB galaxies at cosmic dawn Open
Aims. The scenario of feedback-free starbursts (FFB), which predicts excessively bright galaxies at cosmic dawn as observed using JWST, may provide a natural setting for black hole (BH) growth. This involves the formation of intermediate-m…
View article: Formation of giant clumps in high-<i>z</i> disc galaxies by compressive turbulence
Formation of giant clumps in high-<i>z</i> disc galaxies by compressive turbulence Open
We address the formation of giant clumps in violently unstable gas-rich disc galaxies at cosmic noon. While these are commonly thought to originate from gravitational Toomre instability, some cosmological simulations have indicated that cl…
View article: Effects of cloud geometry and metallicity on shattering and coagulation of cold gas, and implications for cold streams penetrating virial shocks
Effects of cloud geometry and metallicity on shattering and coagulation of cold gas, and implications for cold streams penetrating virial shocks Open
Theory and observations reveal that the circumgalactic medium (CGM) and the cosmic web at high redshifts are multiphase, with small clouds of cold gas embedded in a hot, diffuse medium. We study the ‘shattering’ of large, thermally unstabl…
View article: Effects of Cloud Geometry and Metallicity on Shattering and Coagulation of Cold Gas, and Implications for Cold Streams Penetrating Virial Shocks
Effects of Cloud Geometry and Metallicity on Shattering and Coagulation of Cold Gas, and Implications for Cold Streams Penetrating Virial Shocks Open
Theory and observations reveal that the circumgalactic medium (CGM) and the cosmic web at high redshifts are multiphase, with small clouds of cold gas embedded in a hot, diffuse medium. A proposed mechanism is `shattering' of large, therma…
View article: Growth of Massive Black-Holes in FFB Galaxies at Cosmic Dawn
Growth of Massive Black-Holes in FFB Galaxies at Cosmic Dawn Open
The scenario of feedback-free starbursts (FFB), which predicts excessively bright galaxies at cosmic dawn as observed using JWST, may provide a natural setting for black hole (BH) growth. This involves the formation of intermediate-mass se…
View article: Radial Transport in High-Redshift Disk Galaxies Dominated by Inflowing Streams
Radial Transport in High-Redshift Disk Galaxies Dominated by Inflowing Streams Open
We study the radial transport of cold gas within simulated disk galaxies at cosmic noon, aiming at distinguishing between disk instability and accretion along cold streams from the cosmic web as its driving mechanism. Disks are selected ba…
View article: Filaments of the Slime Mold Cosmic Web and How They Affect Galaxy Evolution
Filaments of the Slime Mold Cosmic Web and How They Affect Galaxy Evolution Open
We present a novel approach for identifying cosmic web filaments within the DisPerSE structure identification framework, using cosmic density field estimates from the Monte Carlo Physarum Machine (MCPM), inspired by the slime mold organism…
View article: Entrainment of hot gas into cold streams: the origin of excessive star formation rates at cosmic noon
Entrainment of hot gas into cold streams: the origin of excessive star formation rates at cosmic noon Open
We explore the evolution of cold streams from the cosmic web that feed galaxies through their shock-heated circumgalactic medium (CGM) at cosmic noon, $z\simeq 1-5$. In addition to the hydrodynamical instabilities and radiative cooling tha…
View article: Formation of Giant Clumps in High-$z$ Disc Galaxies by Compressive Turbulence
Formation of Giant Clumps in High-$z$ Disc Galaxies by Compressive Turbulence Open
We address the formation of giant clumps in violently unstable gas-rich disc galaxies at cosmic noon. While these are commonly thought to originate from gravitational Toomre instability, cosmological simulations have indicated that clumps …
View article: Feedback-free starbursts at cosmic dawn
Feedback-free starbursts at cosmic dawn Open
Aims. We extend the analysis of a physical model within the standard cosmology that robustly predicts a high star-formation efficiency (SFE) in massive galaxies at cosmic dawn due to feedback-free starbursts (FFBs). This model implies an e…
View article: The AGORA High-resolution Galaxy Simulations Comparison Project. VI. Similarities and Differences in the Circumgalactic Medium
The AGORA High-resolution Galaxy Simulations Comparison Project. VI. Similarities and Differences in the Circumgalactic Medium Open
We analyze the circumgalactic medium (CGM) for eight commonly-used cosmological codes in the AGORA collaboration. The codes are calibrated to use identical initial conditions, cosmology, heating and cooling, and star formation thresholds, …
View article: The Halo21 absorption modelling challenge: lessons from ‘observing’ synthetic circumgalactic absorption spectra
The Halo21 absorption modelling challenge: lessons from ‘observing’ synthetic circumgalactic absorption spectra Open
In the Halo21 absorption modelling challenge we generated synthetic absorption spectra of the circumgalactic medium (CGM), and attempted to estimate the metallicity, temperature, and density (Z, T, and nH) of the underlying gas using obser…
View article: The Extended [C ii] under Construction? Observation of the Brightest High-z Lensed Star-forming Galaxy at z = 6.2
The Extended [C ii] under Construction? Observation of the Brightest High-z Lensed Star-forming Galaxy at z = 6.2 Open
We present results of [C ii ] 158 μ m emission line observations, and report the spectroscopic redshift confirmation of a strongly lensed ( μ ∼ 20) star-forming galaxy, MACS0308-zD1 at z = 6.2078 ± 0.0002. The [C ii ] emission line is dete…
View article: The structure and dynamics of massive high-<i>z</i> cosmic-web filaments: three radial zones in filament cross-sections
The structure and dynamics of massive high-<i>z</i> cosmic-web filaments: three radial zones in filament cross-sections Open
We analyse the internal structure and dynamics of cosmic-web filaments connecting massive high-z haloes. Our analysis is based on a high-resolution arepo cosmological simulation zooming-in on three Mpc-scale filaments feeding three massive…
View article: Feedback-Free Starbursts at Cosmic Dawn: Observable Predictions for JWST
Feedback-Free Starbursts at Cosmic Dawn: Observable Predictions for JWST Open
We extend the analysis of a physical model within the standard cosmology that robustly predicts a high star-formation efficiency (SFE) in massive galaxies at cosmic dawn due to feedback-free starbursts (FFBs). It implies an excess of brigh…
View article: Filaments of The Slime Mold Cosmic Web And How They Affect Galaxy Evolution
Filaments of The Slime Mold Cosmic Web And How They Affect Galaxy Evolution Open
We present a novel method for identifying cosmic web filaments using the IllustrisTNG (TNG100) cosmological simulations and investigate the impact of filaments on galaxies. We compare the use of cosmic density field estimates from the Dela…
View article: UV-bright Star-forming Clumps and Their Host Galaxies in UVCANDELS at 0.5 ≤ z ≤ 1
UV-bright Star-forming Clumps and Their Host Galaxies in UVCANDELS at 0.5 ≤ z ≤ 1 Open
Giant star-forming clumps are a prominent feature of star-forming galaxies (SFGs) and contain important clues on galaxy formation and evolution. However, the basic demographics of clumps and their host galaxies remain uncertain. Using the …
View article: UV-Bright Star-Forming Clumps and Their Host Galaxies in UVCANDELS at 0.5 $\leq$ z $\leq$ 1
UV-Bright Star-Forming Clumps and Their Host Galaxies in UVCANDELS at 0.5 $\leq$ z $\leq$ 1 Open
Giant star-forming clumps are a prominent feature of star-forming galaxies (SFGs) and contain important clues on galaxy formation and evolution. However, basic demographics of clumps and their host galaxies remain uncertain. Using the HST/…