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astro-ph.GA2026

Isomer-specific excitation of formic acid in collisions with helium atoms

Karina Sogomonyan, Anzhela Veselinova-Marinova, François Lique +1

An accurate estimation of the molecular abundances of isomers in the interstellar medium (ISM) is necessary to unravel the underlying chemistry and physics. After the recent detect…

astro-ph.GA2026

Chemistry and ro-vibrational excitation of CH in the planetary nebula NGC 7027

Milan Sil, Alexandre Faure, Helmut Wiesemeyer +5

Small carbon hydride cations, such as the methylidyne ion (CH), play an important role in the chemistry of the interstellar medium (ISM). They participate in gas-phase reaction…

astro-ph.GA2026

JWST MIRI-MRS observations of the Red Rectangle: AIB class transformation in the outer nebula

A. Ebenbichler, P. Moraga Baez, A. Candian +8

Aims: We characterize the mid-infrared spectrum of the outer regions of the Red Rectangle nebula to probe the carbonaceous dust and molecular content beyond the circumbinary disk.…

astro-ph.GA2026★ 1 cited

MICONIC: JWST/MIRI-MRS reveals heavily reprocessed PAH emission in the circum-nuclear disc of Centaurus A

L. Pantoni, M. Baes, L. Decin +23

Polycyclic aromatic hydrocarbons (PAHs) are key dust components in galaxies and play a fundamental role in the physics of the interstellar medium (ISM), yet their response to AGN f…

astro-ph.GA2025★ 1 cited

The Nearby Evolved Stars Survey III: First data release of JCMT CO-line observations

S. H. J. Wallström, P. Scicluna, S. Srinivasan +37

Low- to intermediate-mass (0.88 M) evolved stars contribute significantly to the chemical enrichment of the interstellar medium in the local Universe, making accur…

astro-ph.GA2025★ 1 cited

The large-scale kinematics of young stars in the Milky Way disc: first results from SDSS-V

Eleonora Zari, Jaime Villaseñor, Marina Kounkel +17

We present a first large-scale kinematic map of 50,000 young OB stars ( K), based on BOSS spectroscopy from the Milky Way Mapper OB program in the on…

astro-ph.GA2025★ 11 cited

Spatially resolved broad line region in a quasar at z=4: Dynamical black hole mass and prominent outflow

GRAVITY+ Collaboration, K. Abd El Dayem, N. Aimar +92

We present the first near-infrared interferometric data of a QSO at z=4. The K-band observations were performed with GRAVITY+ on the VLTI using all four UTs, detecting a differenti…

astro-ph.GA2025★ 4 cited

Investigating silicate, carbon, and water in the diffuse interstellar medium: the first shots from WISCI

S. T. Zeegers, Jonathan P. Marshall, Karl D. Gordon +33

The dusty interstellar medium (ISM) of the Milky Way is distributed in a complex, cloudy structure. It is fundamental to the radiation balance within the Milky Way, provides a reac…

astro-ph.GA2025★ 39 cited

JWST Observations of Young protoStars (JOYS): overview of program and early results

E. F. van Dishoeck, Ł. Tychoniec, W. R. M. Rocha +34

The embedded phase is a crucial period in the development of a young star. Mid-IR observations, now possible with JWST with unprecedented sensitivity, spectral resolution and sharp…

astro-ph.GA2025★ 5 cited

Low-metallicity massive single stars with rotation. III. Source of ionization and C-IV emission in I Zw 18

Dorottya Szécsi, Frank Tramper, Brankica Kubátová +5

Chemically homogeneously evolving stars have been proposed to account for several exotic phenomena, including gravitational-wave emissions and gamma-ray bursts. Here we study wheth…

astro-ph.GA2025

Testing stellar yield prescriptions in OMEGA+: Implications for rising sodium abundances in young thick disc stars

Evans K. Owusu, Ashley J. Ruiter, Alex J. Kemp +8

We recently identified an upturn in [Na/Fe] for the population of Solar-type stars in the Galactic young thick disc () at super-Solar metallicity in…

astro-ph.GA2025★ 4 cited

Chemistry and ro-vibrational excitation of HeH in the Planetary Nebula NGC 7027

Milan Sil, Alexandre Faure, Helmut Wiesemeyer +5

HeH belongs to the class of "reactive" ions that can be destroyed so quickly that chemical formation and destruction rates may compete with inelastic rates and should be consid…

astro-ph.GA2025★ 8 cited

The mass-dependent UVJ diagram at cosmic noon: A challenge for galaxy evolution models and dust radiative transfer

Andrea Gebek, Benedikt Diemer, Marco Martorano +9

Context. The UVJ color-color diagram is a widely used diagnostic to separate star-forming and quiescent galaxies. Observational data from photometric surveys reveal a strong stella…

astro-ph.GA2025★ 4 cited

Rotational Excitation of Vinyl Cyanide by Collisions with Helium Atoms at Low Temperature

Karina Sogomonyan, Malek Ben Khalifa, Jérôme Loreau

Among the numerous molecular systems found in the interstellar medium (ISM), vinyl cyanide is the first identified olephinic nitrile. While it has been observed in various sources,…

astro-ph.GA2024★ 8 cited

The spectroscopic binary fraction of the young stellar cluster M17

M. C. Ramírez-Tannus, A. R. Derkink, F. Backs +5

Significant progress has been made toward understanding the formation of massive (M) binaries in close orbits. For example, the detection of a very low velocity d…

astro-ph.GA2024★ 129 cited

Discovery of a dormant 33 solar-mass black hole in pre-release Gaia astrometry

Gaia Collaboration, P. Panuzzo, T. Mazeh +412

Gravitational waves from black-hole merging events have revealed a population of extra-galactic BHs residing in short-period binaries with masses that are higher than expected base…

astro-ph.GA2024★ 5 cited

Collisional excitation of propyne (CHCCH) by He atoms

M. Ben Khalifa, B. Darna, J. Loreau

A detailed interpretation of the detected emission lines of environments in which propyne (or methyl acetylene, CHCCH) is observed requires a knowledge of its collisional rate…

astro-ph.GA2024★ 13 cited

The Energy and Dynamics of Trapped Radiative Feedback with Stellar Winds

Sam Geen, Rebekka Bieri, Alex de Koter +2

In this paper, we explore the significant, non-linear impact that stellar winds have on H ii regions. We perform a parameter study using three-dimensional radiative magnetohydrodyn…

astro-ph.GA2024★ 63 cited

A dynamical measure of the black hole mass in a quasar 11 billion years ago

R. Abuter, F. Allouche, A. Amorim +124

Tight relationships exist in the local universe between the central stellar properties of galaxies and the mass of their supermassive black hole. These suggest galaxies and black h…

astro-ph.GA2024★ 9 cited

Rotational excitation of interstellar benzonitrile by helium atoms

M. Ben Khalifa, J. Loreau

Interstellar aromatic molecules such as polycyclic aromatic hydrocarbons and polycyclic nitrogen and oxygen bearing molecules are thought to be abundant in the interstellar medium.…

astro-ph.GA2024★ 90 cited

Formation of the Methyl Cation by Photochemistry in a Protoplanetary Disk

Olivier Berné, Marie-Aline Martin-Drumel, Ilane Schroetter +53

Forty years ago it was proposed that gas phase organic chemistry in the interstellar medium was initiated by the methyl cation CH3+, but hitherto it has not been observed outside t…

astro-ph.GA2023★ 33 cited

Massive star cluster formation I. High star formation efficiency while resolving feedback of individual stars

Brooke Polak, Mordecai-Mark Mac Low, Ralf S. Klessen +11

The mode of star formation that results in the formation of globular clusters and young massive clusters is difficult to constrain through observations. We present models of massiv…

astro-ph.GA2023★ 12 cited

Collisional excitation of methyl (iso)cyanide by He atoms: rate coefficients and isomerism effects

M. Ben Khalifa, P. J. Dagdigian, J. Loreau

Among all closed-shell species observed in molecular clouds, molecules with C symmetry play a crucial role, as their rotational spectroscopy allows them to behave as a gas t…

astro-ph.GA2023★ 23 cited

Self-consistent dust and non-LTE line radiative transfer with SKIRT

Kosei Matsumoto, Peter Camps, Maarten Baes +4

We introduce Monte Carlo-based non-LTE line radiative transfer calculations in the 3D dust radiative transfer code SKIRT, which was originally set up as a dust radiative transfer c…