output
19922026
Showing 2022 · astro-ph.GAShow all

13 papers · 2 filters

astro-ph.GA2022★ 7 cited

SDSS-IV MaStar: Stellar Parameter Determination with Continuum-Supplemented Full-Spectrum Fitting

Daniel Lazarz, Renbin Yan, Ronald Wilhelm +13

We present a stellar parameter catalog built to accompany the MaStar Stellar Library, which is a comprehensive collection of empirical, medium-resolution stellar spectra. We constr…

astro-ph.GA2022★ 4 cited

Polyaromatic Hydrocarbons with an Imperfect Aromatic System as Catalysts of Interstellar H Formation

David P. Jelenfi, Anita Schneiker, Attila Tajti +2

Although H is the simplest and the most abundant molecule in the Universe, its formation in the interstellar medium, especially in the photodissociation regions is far from b…

astro-ph.GA2022★ 3 cited

Synthetic ngVLA line observations of a massive star-forming cloud

M. Juvela, E. Mannfors, T. Liu +1

Study of pre-stellar cloud evolution requires observations with high sensitivity and resolution, and regions of high-mass star formation are particularly challenging. We wish to qu…

astro-ph.GA2022★ 22 cited

Radio-loud Quasars above Redshift 4: VLBI Imaging of an Extended Sample

M. Krezinger, K. Perger, K. É. Gabányi +7

High-redshift radio sources provide plentiful opportunities for studying the formation and evolution of early galaxies and supermassive black holes. However, the number of known ra…

astro-ph.GA2022★ 143 cited

The chemical characterisation of halo substructure in the Milky Way based on APOGEE

Danny Horta, Ricardo P. Schiavon, J. Ted Mackereth +21

Galactic haloes in a -CDM universe are predicted to host today a swarm of debris resulting from cannibalised dwarf galaxies. The chemo-dynamical information recorded in their st…

astro-ph.GA2022★ 8 cited

Nobeyama Survey of Inward Motions toward Cores in Orion Identified by SCUBA-2

Ken'ichi Tatematsu, You-Ting Yeh, Naomi Hirano +28

In this study, 36 cores (30 starless and 6 protostellar) identified in Orion were surveyed to search for inward motions. We used the Nobeyama 45 m radio telescope, and mapped the c…

astro-ph.GA2022★ 17 cited

Unprecedented change in the position of four radio sources

Oleg Titov, Sándor Frey, Sébastien Lambert +7

Astrometric positions of radio-emitting active galactic nuclei (AGNs) can be determined with sub-milliarcsec accuracy using very long baseline interferometry (VLBI). The usually sm…

astro-ph.GA2022

Three in One: The VLBI Radio View of the X-ray Quasar RX J1456.0+5048

Sándor Frey, Ingrid Tar, Krisztina Perger

RX J1456.0+5048 is a prominent X-ray source detected by ROSAT. There is ~100-mJy level radio emission associated with the X-ray source. However, interferometric observations with i…

astro-ph.GA2022★ 10 cited

The cycle of metals in the infalling elliptical galaxy NGC 1404

F. Mernier, N. Werner, Y. Su +6

Hot atmospheres pervading galaxy clusters, groups, and early-type galaxies are rich in metals, produced during epochs and diffused via processes that are still to be determined. Wh…

astro-ph.GA2022★ 4 cited

The Quasar CTD 135 is Not a Compact Symmetric Object

S. Frey, K. É. Gabányi, T. An

The radio-loud quasar CTD 135 (2234+282, J2236+2828) has been proposed as a candidate compact symmetric object (CSO), based on its symmetric radio structure revealed by multi-frequ…

astro-ph.GA2022★ 10 cited

Black Hole Discs and Spheres in Galactic Nuclei -- Exploring the Landscape of Vector Resonant Relaxation Equilibria

Gergely Máthé, Ákos Szölgyén, Bence Kocsis

Vector resonant relaxation (VRR) is known to be the fastest gravitational process that shapes the geometry of stellar orbits in nuclear star clusters. This leads to the realignment…

astro-ph.GA2022★ 10 cited

ATOMS: ALMA Three-millimeter Observations of Massive Star-forming regions -- VII. A catalogue of SiO clumps from ACA observations

Rong Liu, Tie Liu, Gang Chen +28

To understand the nature of SiO emission, we conducted ACA observations of the SiO (2-1) lines toward 146 massive star-forming regions, as part of the ALMA Three-millimeter Observa…

astro-ph.GA2022

Relationships Between Stellar Velocity Dispersion and the Atmospheres of Early-Type Galaxies

R. L. S. Frisbie, M. Donahue, G. M. Voit +3

The Voit et al. (2020) black hole feedback valve model predicts relationships between stellar velocity dispersion and atmospheric structure among massive early-type galaxies. In th…