Feige Wang
YOU?
Author Swipe
View article: Quasar Radiative Feedback May Suppress Galaxy Growth on Intergalactic Scales at <i>z</i> = 6.3
Quasar Radiative Feedback May Suppress Galaxy Growth on Intergalactic Scales at <i>z</i> = 6.3 Open
We present observational evidence that intense ionizing radiation from a luminous quasar suppresses nebular emission in nearby galaxies on intergalactic scales at z = 6.3. Using JWST/NIRCam grism spectroscopy from the Slitless Areal Pure-P…
View article: A Deep Chandra X-ray Survey of a Luminous Quasar Sample at $z\sim$ 7
A Deep Chandra X-ray Survey of a Luminous Quasar Sample at $z\sim$ 7 Open
We present new Chandra observations of seven luminous quasars at $z>6.5$. Combined with archival Chandra observations of all other known quasars, they form nearly complete X-ray observations of all currently known $z\sim7$ quasars with $M_…
View article: A JWST/NIRSpec Integral Field Unit Survey of Luminous Quasars at z ~ 5-6 (Q-IFU): Rest-frame Optical Nuclear Properties and Extended Nebulae
A JWST/NIRSpec Integral Field Unit Survey of Luminous Quasars at z ~ 5-6 (Q-IFU): Rest-frame Optical Nuclear Properties and Extended Nebulae Open
It remains debatable how billion-solar-mass supermassive black holes (SMBHs) form and evolve within the first billion years. We report results from a James Webb Space Telescope (JWST)/NIRSpec integral field unit (IFU) survey of 27 luminous…
View article: A close look at the black hole masses and hot dusty toruses of the first quasars with MIRI-MRS
A close look at the black hole masses and hot dusty toruses of the first quasars with MIRI-MRS Open
The presence of supermassive black holes (SMBHs, $M_\text{BH}\sim10^9 M_\odot$) at $z>7$ remains a puzzle. While their existence appears to require exotic formation or growth processes, it is possible that BH mass estimates are incorrect d…
View article: Updated dark pixel fraction constraints on reionization’s end from the Lyman-series forests of XQR-30
Updated dark pixel fraction constraints on reionization’s end from the Lyman-series forests of XQR-30 Open
The fraction of “dark pixels” in the Lyα and other Lyman-series forests at z ∼ 5–6 provides a powerful constraint on the end of the reionization process. Any spectral region showing transmission must be highly ionized, while dark regions c…
View article: SHELLQs-JWST Unveils the Host Galaxies of 12 Quasars at <i>z</i> > 6
SHELLQs-JWST Unveils the Host Galaxies of 12 Quasars at <i>z</i> > 6 Open
The advent of the James Webb Space Telescope (JWST) has opened new horizons in the study of quasar host galaxies during the reionization epoch ( z > 6). Building upon our previous initial measurements of stellar light from two quasar host …
View article: A first look at quasar-galaxy clustering at $z\simeq7.3$
A first look at quasar-galaxy clustering at $z\simeq7.3$ Open
We present JWST observations of the environments surrounding two high-redshift quasars -- J0252$-$0503 at $z = 7.0$ and J1007$+$2115 at $z = 7.5$ -- which enable the first constraints on quasar-galaxy clustering at $z \sim 7.3$. Galaxies i…
View article: Insights on metal enrichment and environmental effects at <i>z</i> ≈ 5–7 with JWST ASPIRE/EIGER and the chemical evolution model
Insights on metal enrichment and environmental effects at <i>z</i> ≈ 5–7 with JWST ASPIRE/EIGER and the chemical evolution model Open
We present the mass–metallicity relation (MZR) for a parent sample of 604 galaxies at z = 5.34 − 6.94 with [O III ] doublets detected that was obtained from the deep JWST/NIRCam wide field slitless spectroscopic (WFSS) observations in 26 q…
View article: A 13 Billion Year View of Galaxy Growth: Metallicity Gradient Evolution from the Local Universe to <i>z</i> = 9 with JWST and Archival Surveys
A 13 Billion Year View of Galaxy Growth: Metallicity Gradient Evolution from the Local Universe to <i>z</i> = 9 with JWST and Archival Surveys Open
Galaxy gas-phase metallicity gradients have been extensively studied over the past four decades, both in the local and in the high-redshift Universe, as they trace the baryon cycle and growth of galaxies. With the unprecedented spatial res…
View article: A little red dot at z = 7.3 within a large galaxy overdensity
A little red dot at z = 7.3 within a large galaxy overdensity Open
The nature of ‘little red dots’ and their relation to other forms of accreting supermassive black holes remain an open question. Here we report the discovery of a little red dot at z = 7.3. It is attenuated by moderate amounts of dust, A V…
View article: First constraints on the local ionization topology in front of two quasars at z ~ 7.5
First constraints on the local ionization topology in front of two quasars at z ~ 7.5 Open
Thus far, Lyman-$α$ damping wings towards quasars have been used to probe the \textit{global} ionization state of the foreground intergalactic medium (IGM). A new parameterization has demonstrated that the damping wing signature also carri…
View article: New Insight from the James Webb Space Telescope on Variable Active Galactic Nuclei
New Insight from the James Webb Space Telescope on Variable Active Galactic Nuclei Open
Variability detected in galaxies is usually attributed to their active galactic nuclei (AGNs). While all AGNs are intrinsically variable, the classic AGN unification model predicts that type~2 AGNs rarely vary because their engines are obs…
View article: SHELLQs-JWST perspective on the intrinsic mass relation between supermassive black holes and their host galaxies at z > 6
SHELLQs-JWST perspective on the intrinsic mass relation between supermassive black holes and their host galaxies at z > 6 Open
The relation between the masses of supermassive black holes (SMBHs) and their host galaxies encodes information on their mode of growth, especially at the earliest epochs. The James Webb Space Telescope (JWST) has opened such investigation…
View article: The Discovery of Little Red Dots in the Local Universe: Signatures of Cool Gas Envelopes
The Discovery of Little Red Dots in the Local Universe: Signatures of Cool Gas Envelopes Open
JWST observations have revealed a population of high-redshift "little red dots" (LRDs) that challenge conventional AGN models. We report the discovery of three local LRDs at $z = 0.1-0.2$, initially selected from the SDSS database, with fo…
View article: A unique window into the epoch of reionisation: A double-peaked Lyman-<i>α</i> emitter in the proximity zone of a quasar at <i>z</i> ∼ 6.6
A unique window into the epoch of reionisation: A double-peaked Lyman-<i>α</i> emitter in the proximity zone of a quasar at <i>z</i> ∼ 6.6 Open
We present a detailed study of a double-peaked Ly α emitter, named LAE-11, found in the proximity zone of quasar J0910-0414 at z ∼ 6.6 at a proper distance of d QSO ∼ 0.3 pMpc from the quasar. We use a combination of deep photometric data …
View article: Medium-band Astrophysics with the Grism of NIRCam In Frontier Fields (MAGNIF): Spectroscopic Census of H<i>α</i> Luminosity Functions and Cosmic Star Formation at <i>z</i> ∼ 4.5 and 6.3
Medium-band Astrophysics with the Grism of NIRCam In Frontier Fields (MAGNIF): Spectroscopic Census of H<i>α</i> Luminosity Functions and Cosmic Star Formation at <i>z</i> ∼ 4.5 and 6.3 Open
We measure H α luminosity functions (LFs) at redshifts z ∼ 4.5 and 6.3 using the JWST Medium-band Astrophysics with the Grism of NIRCam In Frontier fields (MAGNIF) survey. MAGNIF obtained NIRCam grism spectra with the F360M and F480M filte…
View article: Lyman-break Galaxies in the Megaparsec-scale Environments around Three <i>z</i> ∼ 7.5 Quasars with JWST Imaging
Lyman-break Galaxies in the Megaparsec-scale Environments around Three <i>z</i> ∼ 7.5 Quasars with JWST Imaging Open
We study the megaparsec-scale environments of the three highest-redshift luminous quasars at z ≥ 7.5 (J031343.84-180636.40, J134208.11+092838.61, and J100758.27+211529.21) to understand their connection to large-scale structure. Cosmologic…
View article: Discovery and characterization of 25 new quasars at 4.6 < <i>z</i> < 6.9 from wide-field multiband surveys
Discovery and characterization of 25 new quasars at 4.6 < <i>z</i> < 6.9 from wide-field multiband surveys Open
Luminous quasars at z >4 provide key insights into the early Universe. Their rarity necessitates wide-field multiband surveys to efficiently separate them from the main astrophysical contaminants (i.e., ultracool dwarfs). To expand the sam…
View article: A 13-Billion-Year View of Galaxy Growth: Metallicity Gradient Evolution from the Local Universe to $z=9$ with JWST and Archival Surveys
A 13-Billion-Year View of Galaxy Growth: Metallicity Gradient Evolution from the Local Universe to $z=9$ with JWST and Archival Surveys Open
The galaxy gas-phase metallicity gradients have been extensively studied over the past four decades, both in the local and high-redshift universe, as they trace the baryon cycle and growth of galaxies. With the unprecedented spatial resolu…
View article: Enhanced Merger Fractions in a Reionization-era Protocluster
Enhanced Merger Fractions in a Reionization-era Protocluster Open
Mergers play a critical role in galaxy evolution, but their relationship to their surrounding environments is unexplored at high redshift. We investigate the galaxy merger rate among 124 [O iii ] emitters at 5.3 < z < 6.9 as a function of …
View article: COSMOS2025: The COSMOS-Web galaxy catalog of photometry, morphology, redshifts, and physical parameters from JWST, HST, and ground-based imaging
COSMOS2025: The COSMOS-Web galaxy catalog of photometry, morphology, redshifts, and physical parameters from JWST, HST, and ground-based imaging Open
We present COSMOS2025, the COSMOS-Web catalog of photometry, morphology, photometric redshifts and physical parameters for more than 700,000 galaxies in the Cosmic Evolution Survey (COSMOS) field. This catalog is based on our \textit{James…
View article: NEXUS: A Spectroscopic Census of Broad-line AGNs and Little Red Dots at $3\lesssim z\lesssim 6$
NEXUS: A Spectroscopic Census of Broad-line AGNs and Little Red Dots at $3\lesssim z\lesssim 6$ Open
We present a spectroscopic sample of 23 broad-line AGNs (BLAGNs) at $3\lesssim z\lesssim 6$ selected using F322W2+F444W NIRCam/WFSS grism spectroscopy of the central 100 ${\rm arcmin^2}$ area of the NEXUS survey. Among these BLAGNs, 15 are…
View article: Probing the He <scp>ii</scp> re-Ionization ERa via Absorbing C <scp>iv</scp> Historical Yield (HIERACHY). II. Project Design, Current Status, and Examples of Initial Data Products
Probing the He <span>ii</span> re-Ionization ERa via Absorbing C <span>iv</span> Historical Yield (HIERACHY). II. Project Design, Current Status, and Examples of Initial Data Products Open
The He ii reionization epoch is expected to take place at z ∼ 3–5. In this stage, the helium and metals in the intergalactic medium are further ionized with additional contributions from harder nonstellar sources, and some large-scale grav…
View article: Optical and near-infrared spectroscopy of quasars at <i>z</i> &gt; 6.5: public data release and composite spectrum
Optical and near-infrared spectroscopy of quasars at <i>z</i> > 6.5: public data release and composite spectrum Open
We present optical and near-infrared (NIR) spectroscopic observations for a sample of 45 quasars at $6.50 < z \le 7.64$ with absolute magnitudes at 1450 Å in the range $-28.82 \le M_{1450} \le -24.13$ and their composite spectrum. The m…
View article: SHELLQs-JWST Unveils the Host Galaxies of 12 Quasars at z>6
SHELLQs-JWST Unveils the Host Galaxies of 12 Quasars at z>6 Open
The advent of JWST has opened new horizons in the study of quasar host galaxies during the reionization epoch (z>6). Building upon our previous initial measurements of stellar light from two quasar host galaxies at these redshifts, we now …
View article: SAPPHIRES: Extremely Metal-Poor Galaxy Candidates with $12+{\rm log(O/H)}<7.0$ at $z\sim5-7$ from Deep JWST/NIRCam Grism Observations
SAPPHIRES: Extremely Metal-Poor Galaxy Candidates with $12+{\rm log(O/H)}<7.0$ at $z\sim5-7$ from Deep JWST/NIRCam Grism Observations Open
Population III stars, the hypothetical first generation metal-free stars, have yet to be discovered. Even after three years of successful JWST operations, studies have shown that most galaxies identified to date at $z > 5$ exhibit a metall…
View article: The Large-scale Environments of Low-luminosity AGNs at $3.9 < z < 6$ and Implications for Their Host Dark Matter Halos from a Complete NIRCam Grism Redshift Survey
The Large-scale Environments of Low-luminosity AGNs at $3.9 < z < 6$ and Implications for Their Host Dark Matter Halos from a Complete NIRCam Grism Redshift Survey Open
We study the large-scale environments and clustering properties of 28 low-luminosity AGNs at $z=3.9-6$ in the GOODS-N field. Our sample, identified from the JWST NIRCam Imaging and WFSS data in CONGRESS and FRESCO surveys with either broad…
View article: ‘Little red dots’ cannot reside in the same dark matter haloes as comparably luminous unobscured quasars
‘Little red dots’ cannot reside in the same dark matter haloes as comparably luminous unobscured quasars Open
The JWST has uncovered a new population of candidate broad-line active galactic nucleus (AGN) emerging in the early Universe, named ‘little red dots’ (LRDs) because of their compactness and red colours at optical wavelengths. LRDs appear t…
View article: The Luminosity Function and Clustering of H$α$ Emitting Galaxies at $z\approx4-6$ from a Complete NIRCam Grism Redshift Survey
The Luminosity Function and Clustering of H$α$ Emitting Galaxies at $z\approx4-6$ from a Complete NIRCam Grism Redshift Survey Open
We study the luminosity function (LF) and clustering properties of 888 H$α$ emitters (HAEs) at $3.75 < z < 6$ in the GOODS-N field. The sample, built from JWST CONGRESS and FRESCO NIRCam grism surveys using a novel redshift assignment algo…
View article: Bridging Quasars and Little Red Dots: Insights into Broad-Line AGNs at $z=5-8$ from the First JWST COSMOS-3D Dataset
Bridging Quasars and Little Red Dots: Insights into Broad-Line AGNs at $z=5-8$ from the First JWST COSMOS-3D Dataset Open
We report the discovery of 13 broad-line AGNs at $z = 5 - 8$ from the first 10% data of the JWST Cycle 3 Treasury Program COSMOS-3D. These AGNs are identified by their broad H$α$ or H$β$ emission lines through the NIRCam grism wide-field s…