output
19922026
Showing 2023 · astro-ph.GAShow all

18 papers · 2 filters

astro-ph.GA2023★ 1 cited

Milliarcsecond-scale radio structure of the most distant BL Lac object candidate at redshift 6.57

S. Frey, Y. Zhang, K. Perger +7

The existence of accreting supermassive black holes up to billions of solar masses at early cosmological epochs (in the context of this work, redshifts z>=6) requires very fast gro…

astro-ph.GA2023★ 72 cited

A Tale of Two Disks: Mapping the Milky Way with the Final Data Release of APOGEE

Julie Imig, Cathryn Price, Jon A. Holtzman +24

We present new maps of the Milky Way disk showing the distribution of metallicity ([Fe/H]), -element abundances ([Mg/Fe]), and stellar age, using a sample of 66,496 red giant st…

astro-ph.GA2023★ 15 cited

The chemical evolution of the solar neighbourhood for planet-hosting stars

Marco Pignatari, Thomas C. L. Trueman, Kate A. Womack +13

Theoretical physical-chemical models for the formation of planetary systems depend on data quality for the Sun's composition, that of stars in the solar neighbourhood, and of the e…

astro-ph.GA2023★ 4 cited

From binary to singular: the AGN PSO J334.2028+1.4075 under the high-resolution scope

P. Benke, K. É. Gabányi, S. Frey +6

PSO J334.2028+1.4075 (PSO J334) is a luminous quasar located at redshift z=2.06. The source gained attention when periodic flux density variations were discovered in its optical li…

astro-ph.GA2023★ 43 cited

Direct observational evidence of the multi-scale, dynamical mass accretion toward a high-mass star forming hub-filament system

Dongting Yang, Hong-Li Liu, Anandmayee Tej +28

There is growing evidence that high-mass star formation and hub-filament systems (HFS) are intricately linked. The gas kinematics along the filaments and the forming high-mass star…

astro-ph.GA2023★ 57 cited

Unveiling the time evolution of chemical abundances across the Milky Way disk with APOGEE

Bridget Ratcliffe, Ivan Minchev, Friedrich Anders +12

Chemical abundances are an essential tool in untangling the Milky Way's enrichment history. However, the evolution of the interstellar medium abundance gradient with cosmic time is…

astro-ph.GA2023★ 11 cited

LSST Survey Strategy in the Galactic Plane and Magellanic Clouds

R. A. Street, X. Li, S. Khakpash +16

Galactic science encompasses a wide range of subjects in the study of the Milky Way and Magellanic Clouds, from Young Stellar Objects to X-ray Binaries. Mapping these populations,…

astro-ph.GA2023

The Detection of a Compact Radio Feature in a Seyfert Galaxy After an Accretion Rate Change

K. É. Gabányi, K. Smith, S. Frey +3

X-ray binaries are known to show state transitions related to accretion rate changes which are often accompanied with dramatic changes in the jet emission. However, it is not clear…

astro-ph.GA2023★ 9 cited

Astrometric Apparent Motion of High-redshift Radio Sources

Oleg Titov, Sandor Frey, Alexei Melnikov +10

Radio-loud quasars at high redshift (z > 4) are rare objects in the Universe and rarely observed with Very Long Baseline Interferometry (VLBI). But some of them have flux density s…

astro-ph.GA2023★ 19 cited

Inhomogeneous enrichment of radioactive nuclei in the Galaxy: Deposition of live Mn-53, Fe-60, Hf-182, and Pu-244 into deep-sea archives. Surfing the wave?

Benjamin Wehmeyer, Andrés Yagüe López, Benoit Côté +3

While modelling the galactic chemical evolution (GCE) of stable elements provides insights to the formation history of the Galaxy and the relative contributions of nucleosynthesis…

astro-ph.GA2023★ 18 cited

Intermediate-mass black holes: finding of episodic, large-scale and powerful jet activity in a dwarf galaxy

Jun Yang, Zsolt Paragi, Sándor Frey +10

Dwarf galaxies are characterised by a very low luminosity and low mass. Because of significant accretion and ejection activity of massive black holes, some dwarf galaxies also host…

astro-ph.GA2023

J2102+6015: an Intriguing Radio-loud Active Galactic Nucleus in the Early Universe

S. Frey, T. An, K. Gabányi +10

The powerful high-redshift quasar J2102+6015 (at z=4.575) may provide useful information for studying supermassive black hole growth, galaxy evolution and feedback in the early Uni…

astro-ph.GA2023★ 5 cited

Very long baseline interferometry observations of the high-redshift blazar candidate J0141-5427

K. É. Gabányi, S. Belladitta, S. Frey +7

Active galactic nuclei (AGN) have been observed as far as redshift z~7. They are crucial in investigating the early Universe as well as the growth of supermassive black holes at th…

astro-ph.GA2023★ 55 cited

Evidence of high-mass star formation through multi-scale mass accretion in hub-filament-system clouds

Hong-Li Liu, Anandmayee Tej, Tie Liu +30

We present a statistical study of a sample of 17 hub-filament-system (HFS) clouds of high-mass star formation using high-angular resolution (1-2 arcsecond) ALMA 1.3mm and 3mm…

astro-ph.GA2023★ 71 cited

ATOMS: ALMA Three-millimeter Observations of Massive Star-forming regions -- XV. Steady Accretion from Global Collapse to Core Feeding in Massive Hub-filament System SDC335

Feng-Wei Xu, Ke Wang, Tie Liu +37

We present ALMA Band-3/7 observations towards "the Heart" of a massive hub-filament system (HFS) SDC335, to investigate its fragmentation and accretion. At a resolution of $\sim0.0…

astro-ph.GA2023★ 1 cited

High-resolution Imaging of Two Radio Quasars at the End of the Reionization Epoch

Krisztina Perger, Yingkang Zhang, Sándor Frey +7

There are approximately 250 quasars discovered at redshift , of which only a handful were detected in radio bands, and even fewer were imaged with the highest resolution ve…

astro-ph.GA2023★ 282 cited

The Eighteenth Data Release of the Sloan Digital Sky Surveys: Targeting and First Spectra from SDSS-V

Andrés Almeida, Scott F. Anderson, Maria Argudo-Fernández +151

The eighteenth data release of the Sloan Digital Sky Surveys (SDSS) is the first one for SDSS-V, the fifth generation of the survey. SDSS-V comprises three primary scientific progr…

astro-ph.GA2023★ 38 cited

The NANOGrav 12.5-year Data Set: Bayesian Limits on Gravitational Waves from Individual Supermassive Black Hole Binaries

Zaven Arzoumanian, Paul T. Baker, Laura Blecha +75

Pulsar timing array collaborations, such as the North American Nanohertz Observatory for Gravitational Waves (NANOGrav), are seeking to detect nanohertz gravitational waves emitted…