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Astronomy & Astrophysics
Scopus
ISSN 0004-6361 · EDP Sciences · 3.349 artikel di indeks
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Artikel Jurnal
Astrometric exomoon detection by means of optical interferometry
Context. With no conclusive detection to date, the search for exomoons, satellites of planets orbiting other stars, remains a formidable challenge. Detecting these objects, compiling a population-level sample and constraining their occurrence will inform planet and moon formation models and shed…
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PRUSSIC
Characterising the relationship between dense gas and star formation is critical for understanding the assembly of galaxies throughout cosmic history. However, due to the faintness of standard dense-gas tracers – HCN, HCO+, and HNC – dense gas in high-redshift galaxies remains largely unexplored…
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MIRI spectrophotometry of GN-z11: Detection and nature of an optical red continuum component
We present new MIRI F560W, F770W, and F1000W imaging of the galaxy GN-z11 at a redshift of 10.603. We report a significant detection (14σ) in the F560W and F770W images, and a marginal detection (3.2σ) in the F1000W filter. The new MIRI observations cover the optical-red spectral range and…
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Detection of low-luminosity X-ray pulsations from the accreting millisecond pulsar IGR J17511−3057: An ever-thinning thread between bright accretion and subluminous states
After nearly a decade in quiescence, the accreting millisecond pulsar IGR J17511−3057 displayed a new outburst on 2025 February 11, its third since discovery, following previous activity in 2009 and 2015. We report on an XMM-Newton Target of Opportunity observation performed on 2025 March 4, more…
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Millimeter-wave observations of Euclid Deep Field South using the South Pole Telescope
Context. The South Pole Telescope third-generation camera (SPT-3G) has observed over 10 000 square degrees of sky at 95, 150, and 220 GHz (3.3, 2.0, 1.4 mm, respectively) and will significantly overlap the ongoing 14 000 square-degree Euclid Wide Survey. The Euclid collaboration recently released…
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Sensitivity of the redshifted 21 cm signal from the Dark Ages to parameters of primordial magnetic fields
We analyse the impact of the decaying magnetic turbulence of primordial magnetic fields (PMFs) and ambipolar diffusion on the ionisation and thermal history of the Dark Ages Universe (30 ≤ z ≤ 300), and its imprint on the spectral profile of the global signal in the redshifted 21 cm hydrogen line…
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Extra modes in helium-core-burning stars probing an infra core cavity
Context. Dipole mixed modes observed in the oscillation pattern of red giant stars probe the radiative regions in the stellar core. Aims. Oscillation spectra of helium-core-burning stars sometimes show extra peaks that remain unexplained by the dipole mixed-mode pattern expected from the coupling…
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First direct electron temperature measurement in [O II] zone in I Zw 18
We present new precise measurements of the electron temperatures and oxygen abundances in the southeast knot of I Zw 18, one of the most metal poor blue compact dwarf galaxies known. We used spectroscopic data from the Dark Energy Spectroscopic Instrument Data Release 1 (DESI DR1). For the first…
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Dark matter in ALFALFA galaxies
Aims. This paper aims to investigate the galaxy-halo connection using a large sample of individual galaxies with H I-integrated spectra. We determined their dark matter content by applying a dynamical method based on H I line widths measured with the curve-of-growth technique, together with…
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The HST-Hyperion Survey: Companion fraction and overdensity in a z ∼ 2.5 proto-supercluster
We present a study of the galaxy merger and interaction activity within the Hyperion Proto-supercluster at z ∼ 2.5 in an effort to assess the occurrence of galaxy mergers and interactions in contrast to the coeval field and their impact on the buildup of stellar mass in high-density environments at…
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Using multi-task learning to determine gas-phase metallicity of star-forming galaxies
Aims. This study aimed to improve the estimation of the gas-phase metallicity of star-forming galaxies by using a multi-task learning approach that simultaneously performs gas-phase metallicity estimation and spectral classification of galaxies. Methods. We propose a multi-task learning model to…
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Artikel Jurnal
PHANGS-JWST: The largest extragalactic molecular cloud catalog traced by polycyclic aromatic hydrocarbon emission
High-resolution JWST images of nearby spiral galaxies reveal polycyclic aromatic hydrocarbon (PAH) structures that potentially trace molecular clouds, even CO-dark regions. For this paper, we identified ISM cloud structures in PHANGS-JWST 7.7 μm PAH emission maps for 66 galaxies, smoothed to a…
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Unveiling the 3D structure of the central molecular zone from stellar kinematics and photometry: The 50 and 20 km/s clouds
Context. The central molecular zone (CMZ), surrounding the Galactic centre, is the largest reservoir of dense molecular gas in the Galaxy. Despite its relative proximity, the 3D structure of the CMZ remains poorly constrained, primarily due to projection effects. Aims. We aim to constrain the…
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The invariance of group occupation across the cosmic web
Context. Recent efforts to identify secondary variations in the halo occupation distribution (HOD) have primarily focused on simulations that examine the role of large-scale cosmic environments, such as superclusters, filaments, and under-dense regions or voids. If present, these variations can…
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Disk Evolution Study Through Imaging of Nearby Young Stars (DESTINYS): V721 CrA and BN CrA have wide and structured disks in the polarised infrared
Context. The environment within which stars form and evolve can play a crucial role in shaping their surrounding protoplanetary disks. This is the reason why homogeneous analyses of protoplanetary disks around young stars in the same star-forming region has become of great relevance in recent…
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SPT-GloCal: Enhancing [O/Fe] and [Mg/Fe] determinations in metal-poor stars with UV-extended low-resolution CSST spectra
Metal-poor stars (MP, [Fe/H]
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Impact of magnetic field gradients on the development of the magneto-rotational instability
Context. The magneto-rotational instability (MRI) plays a crucial role in accretion disk modelling, driving magnetohydrodynamic turbulence and facilitating enhanced angular momentum transport. Notably, MRI is believed to be pivotal in the development of large-scale poloidal magnetic fields during…
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Artikel Jurnal
Probing jet base emission of M87* with the 2021 Event Horizon Telescope observations
We investigate the presence and spatial characteristics of the jet base emission in M87* at 230 GHz, enabled by the significantly enhanced (u,v) coverage in the 2021 Event Horizon Telescope (EHT) observations. The integration of the 12−m Kitt Peak Telescope (USA) and NOEMA (France) stations into…
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Artikel Jurnal
Zooming in on cluster radio relics
It is generally accepted that radio relics are the result of synchrotron emission from shock-accelerated electrons. However, current models are still unable to explain several aspects of their formation. In this paper, we focus on three outstanding problems: (i) Mach number estimates derived from…
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Artikel Jurnal
Resolving the terrestrial planet-forming region of HD 172555 with ALMA
Context. Giant impacts between planetary embryos are a natural step in the terrestrial planet formation process and are expected to create disks of warm debris in the terrestrial regions of their stars. Understanding the gas and dust debris produced in giant impacts is vital for comprehending and…
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