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View article: The X-Ray Emission of NGC 5005: An Unobscured Low-luminosity Active Galactic Nucleus with a Weakly Accreting Broad-line Region
The X-Ray Emission of NGC 5005: An Unobscured Low-luminosity Active Galactic Nucleus with a Weakly Accreting Broad-line Region Open
We present deep Chandra X-ray observations of NGC 5005, a LINER-dominated galaxy previously reported to host a broad H α emission line. The diffuse soft X-ray emission (3 keV) is confined to the central ∼400 pc. Spatially resolved spectros…
View article: The X-ray Emission of NGC 5005: An Unobscured Low-Luminosity AGN with a Weakly Accreting Broad-Line Region
The X-ray Emission of NGC 5005: An Unobscured Low-Luminosity AGN with a Weakly Accreting Broad-Line Region Open
We present deep Chandra X-ray observations of NGC 5005, a LINER-dominated galaxy previously reported to host a broad H$α$ emission line. The diffuse soft X-ray emission ($<$3 keV) extends out to $\sim$800 pc, while harder emission ($>$3 ke…
View article: Space science & the space economy
Space science & the space economy Open
View article: Mapping the Excitation Mechanisms in the LINER I Active Galactic Nucleus NGC 5005: Positive Feedback and a Thin LINER Cocoon
Mapping the Excitation Mechanisms in the LINER I Active Galactic Nucleus NGC 5005: Positive Feedback and a Thin LINER Cocoon Open
We present a spatially resolved Baldwin–Phillips–Terlevich analysis of the narrow-line region (NLR) in the low-ionization nuclear emission-line region (LINER) I galaxy NGC 5005 using Hubble Space Telescope narrowband imaging of [O iii ] λ …
View article: Technical Challenges and Ethical, Legal and Social Issues (ELSI) for Asteroid Mining and Planetary Defense
Technical Challenges and Ethical, Legal and Social Issues (ELSI) for Asteroid Mining and Planetary Defense Open
Advances in the field of asteroid dynamics continue to yield new knowledge regarding the behavior and characteristics of asteroids, allowing unprecedented levels of accuracy for predicting trajectories and contributing to impact avoidance …
View article: Cosmic Himalayas: The Highest Quasar Density Peak Identified in a 10,000 deg<sup>2</sup> Sky with Spatial Discrepancies between Galaxies, Quasars, and IGM H<scp> i</scp>
Cosmic Himalayas: The Highest Quasar Density Peak Identified in a 10,000 deg<sup>2</sup> Sky with Spatial Discrepancies between Galaxies, Quasars, and IGM H<span> i</span> Open
We report the identification of a quasar overdensity in the BOSSJ0210 field, dubbed the Cosmic Himalayas, consisting of 11 quasars at z = 2.16−2.20, the densest overdensity of quasars (17 σ ) in the ∼10,000 deg 2 of the Sloan Digital Sky S…
View article: On ore-bearing asteroid remnants in lunar craters
On ore-bearing asteroid remnants in lunar craters Open
View article: Chandra Discovery of a Candidate Hyperluminous X-Ray Source in MCG+11-11-032
Chandra Discovery of a Candidate Hyperluminous X-Ray Source in MCG+11-11-032 Open
We present a multiwavelength analysis of MCG+11-11-032, a nearby active galactic nucleus (AGN), with a unique classification as being both a binary and a dual AGN candidate. With new Chandra observations, we aim to resolve any dual AGN sys…
View article: X-ray view of a massive node of the Cosmic Web at <i>z</i> ∼ 3
X-ray view of a massive node of the Cosmic Web at <i>z</i> ∼ 3 Open
Context. Exploring supermassive black hole (SMBH) populations in protoclusters offers valuable insights into how environment affects SMBH growth. However, research on active galactic nuclei (AGN) within these areas is still limited by the …
View article: Deep Chandra Observations of NGC 5728. III. Probing the High-resolution X-Ray Morphology and Multiphase Interstellar Medium Interactions in the Circumnuclear Region
Deep Chandra Observations of NGC 5728. III. Probing the High-resolution X-Ray Morphology and Multiphase Interstellar Medium Interactions in the Circumnuclear Region Open
We present a detailed imaging analysis of 260 ks of subarcsecond resolution Chandra (ACIS-S) observations of the nearby Seyfert 2 galaxy NGC 5728. Our study focuses on the bright and diffuse soft X-ray emission within the galaxy's inner ∼1…
View article: <i>Hubble Space Telescope</i> observations of nearby type 1 quasars. I. Characterization of the extended [O <scp>iii</scp>] 5007 Å emission
<i>Hubble Space Telescope</i> observations of nearby type 1 quasars. I. Characterization of the extended [O <span>iii</span>] 5007 Å emission Open
We use the Hubble Space Telescope to analyse the extended [O iii] 5007 Å emission in seven bright radio-quiet type 1 quasars (QSO1s), focusing on the morphology and physical conditions of their extended Narrow-Line Regions (NLRs). We find …
View article: HYPERION. Shedding light on the first luminous quasars: A correlation between UV disc winds and X-ray continuum
HYPERION. Shedding light on the first luminous quasars: A correlation between UV disc winds and X-ray continuum Open
One of the main open questions in the field of luminous ($L_{\rm bol}>10^{47}\,\rm erg\,s^{-1}$) quasars (QSOs) at $z \gtrsim 6$ is the rapid formation ($< 1\,$Gyr) of their supermassive black holes (SMBHs). For this work we analysed the r…
View article: TREASUREHUNT: Transients and Variability Discovered with HST in the JWST North Ecliptic Pole Time-domain Field
TREASUREHUNT: Transients and Variability Discovered with HST in the JWST North Ecliptic Pole Time-domain Field Open
The James Webb Space Telescope (JWST) North Ecliptic Pole (NEP) Time-domain Field (TDF) is a >14′ diameter field optimized for multiwavelength time-domain science with JWST. It has been observed across the electromagnetic spectrum both fro…
View article: Cosmic Himalayas: The Highest Quasar Density Peak Identified in a 10,000 deg$^2$ Sky with Spatial Discrepancies between Galaxies, Quasars, and IGM HI
Cosmic Himalayas: The Highest Quasar Density Peak Identified in a 10,000 deg$^2$ Sky with Spatial Discrepancies between Galaxies, Quasars, and IGM HI Open
We report the identification of a quasar overdensity in the BOSSJ0210 field, dubbed Cosmic Himalayas, consisting of 11 quasars at $z=2.16-2.20$, the densest overdensity of quasars ($17σ$) in the $\sim$10,000 deg$^2$ of the Sloan Digital Sk…
View article: Astronomy from the Moon: the next decades (part 2)
Astronomy from the Moon: the next decades (part 2) Open
View article: Erratum: “X-Ray Emission from the Nuclear Region of Arp 220” (2017, ApJ, 841, 44)
Erratum: “X-Ray Emission from the Nuclear Region of Arp 220” (2017, ApJ, 841, 44) Open
View article: Discovery of Kiloparsec-scale Semirelativistic Fe Kα Complex Emission in NGC 5728
Discovery of Kiloparsec-scale Semirelativistic Fe Kα Complex Emission in NGC 5728 Open
We present Chandra ACIS-S imaging spectroscopy results of the extended (1.″5–8″, 300–1600 pc) hard X-ray emission of NGC 5728, the host galaxy of a Compton-thick active galactic nucleus. We find spectrally and spatially resolved features i…
View article: Deep Chandra Observation of the Remarkable Ionization Cones of NGC 5252
Deep Chandra Observation of the Remarkable Ionization Cones of NGC 5252 Open
Seyfert galaxy NGC 5252 harbors enormously extended ionization cones that have been previously detected in the optical and X-ray band, offering a unique opportunity to investigate the interaction between the central active galactic nucleus…
View article: Deep Chandra Observation of the Remarkable Ionization Cones of NGC 5252
Deep Chandra Observation of the Remarkable Ionization Cones of NGC 5252 Open
Seyfert galaxy NGC 5252 harbors enormously extended ionization cones, which have been previously detected in the optical and X-ray band, offering a unique opportunity to investigate the interaction between the central active galactic nucle…
View article: TREASUREHUNT: Transients and Variability Discovered with HST in the JWST North Ecliptic Pole Time Domain Field
TREASUREHUNT: Transients and Variability Discovered with HST in the JWST North Ecliptic Pole Time Domain Field Open
The JWST North Ecliptic Pole (NEP) Time Domain Field (TDF) is a $>$14 arcmin diameter field optimized for multi-wavelength time-domain science with JWST. It has been observed across the electromagnetic spectrum both from the ground and fro…
View article: HYPerluminous quasars at the Epoch of ReionizatION (HYPERION): A new regime for the X-ray nuclear properties of the first quasars
HYPerluminous quasars at the Epoch of ReionizatION (HYPERION): A new regime for the X-ray nuclear properties of the first quasars Open
The existence of luminous quasars (QSOs) at the epoch of reionization (EoR; i.e., z > 6) powered by well-grown supermassive black holes (SMBHs) with masses ≳10 9 M ⊙ challenges models of early SMBH formation and growth. To shed light on th…
View article: The most luminous blue quasars at 3.0 < <i>z</i> < 3.3
The most luminous blue quasars at 3.0 < <i>z</i> < 3.3 Open
We present the analysis of the rest frame ultraviolet and optical spectra of 30 bright blue quasars at z ∼ 3, selected to examine the suitability of active galactic nuclei as cosmological probes. In our previous works, based on pointed XMM…
View article: A UFO Seen Edge-on? Resolving Ultrafast Outflow Emission on ∼200 pc Scales with Chandra in the Active Nucleus of Mrk 34
A UFO Seen Edge-on? Resolving Ultrafast Outflow Emission on ∼200 pc Scales with Chandra in the Active Nucleus of Mrk 34 Open
We present Chandra ACIS imaging spectroscopy of the nucleus of the Seyfert 2 Galaxy Mrk 34. We identify spatially and spectrally resolved features in the band that includes Fe K α , Fe xxv, and Fe xxvi . These features suggest high-velocit…
View article: Deep Chandra Observations of NGC 5728: Morphology and Spectral Properties of the Extended X-Ray Emission
Deep Chandra Observations of NGC 5728: Morphology and Spectral Properties of the Extended X-Ray Emission Open
Recent deep Chandra observations of nearby Compton-thick (CT) active galactic nuclei (AGNs) have produced surprising results, uncovering extended emission not only in soft X-rays but also in hard emission (>3 keV), challenging the long-hel…
View article: The most luminous blue quasars at 3.0
The most luminous blue quasars at 3.0 Open
We present the analysis of the rest frame ultraviolet and optical spectra of 30 bright blue quasars at $z\sim3$, selected to examine the suitability of AGN as cosmological probes. In our previous works, we found an unexpectedly high fracti…
View article: Extended Hard X-Ray Emission in Highly Obscured AGNs
Extended Hard X-Ray Emission in Highly Obscured AGNs Open
Kiloparsec-scale hard (>3 keV) X-ray continuum and fluorescent Fe K α line emission has been recently discovered in nearby Compton-thick (CT) active galactic nuclei (AGNs), which opens new opportunities to improve AGN torus modeling and in…
View article: Accurate Dust Temperature and Star Formation Rate in the Most Luminous z > 6 Quasar in the Hyperluminous Quasars at the Epoch of Reionization (HYPERION) Sample
Accurate Dust Temperature and Star Formation Rate in the Most Luminous z > 6 Quasar in the Hyperluminous Quasars at the Epoch of Reionization (HYPERION) Sample Open
We present ALMA Band 9 continuum observation of the ultraluminous quasi-stellar object (QSO) SDSS J0100+2802 providing a ∼10 σ detection at ∼670 GHz. SDSS J0100+2802 is the brightest QSO with the most massive supermassive black hole (SMBH)…
View article: Accurate dust temperature and star formation rate in the most luminous $z>6$ quasar in the HYPerluminous quasars at the Epoch of ReionizatION (HYPERION) sample
Accurate dust temperature and star formation rate in the most luminous $z>6$ quasar in the HYPerluminous quasars at the Epoch of ReionizatION (HYPERION) sample Open
We present ALMA Band 9 continuum observation of the ultraluminous quasi-stellar object (QSO) SDSS J0100+2802, providing a $\sim 10σ$ detection at $\sim 670$ GHz. SDSS J0100+2802 is the brightest QSO with the most massive super massive blac…
View article: Extended hard X-ray emission in highly obscured AGN
Extended hard X-ray emission in highly obscured AGN Open
Kilo-parsec scale hard ($>$ 3 keV) X-ray continuum and fluorescent Fe K$α$ line emission has been recently discovered in nearby Compton-thick (CT) active galactic nuclei (AGN), which opens new opportunities to improve AGN torus modeling an…
View article: Accelerating astrophysics with the SpaceX Starship
Accelerating astrophysics with the SpaceX Starship Open
By substantially increasing the mass and volume of its reusable transportation system without raising costs, SpaceX may enable NASA to implement future missions years ahead of schedule.