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View article: 2D unified atmosphere and wind simulations for a grid of O-type stars
2D unified atmosphere and wind simulations for a grid of O-type stars Open
Context . The atmospheres of massive O-type stars (O stars) are dynamic, turbulent environments resulting from radiatively driven instabilities over the iron bump, located slightly beneath the stellar surface. Here, complex radiation hydro…
View article: An on-the-fly line-driven wind iterative mass-loss estimator (LIME) for hot, massive stars of arbitrary chemical compositions
An on-the-fly line-driven wind iterative mass-loss estimator (LIME) for hot, massive stars of arbitrary chemical compositions Open
Context. Mass-loss rates, Ṁ , from hot, massive stars are important for a range of astrophysical applications. Aims. We present LIME, a fast, efficient, and easy-to-use real-time mass-loss calculator for line-driven winds from hot, massive…
View article: Spectral synthesis of 3D unified model atmospheres with winds for O stars
Spectral synthesis of 3D unified model atmospheres with winds for O stars Open
Context. Spectroscopic studies of massive and luminous O-type stellar atmospheres and winds have primarily been done by using one-dimensional (1D), spherically symmetric, and stationary models. However, both observations and modern theoret…
View article: A high fraction of close massive binary stars at low metallicity
A high fraction of close massive binary stars at low metallicity Open
View article: Spectral synthesis of 3D unified model atmospheres with winds for O stars
Spectral synthesis of 3D unified model atmospheres with winds for O stars Open
Spectroscopic studies of massive and luminous O-type stellar atmospheres and winds have primarily been done by using 1D, spherically symmetric and stationary models. Both observations and modern theoretical models show that such stars have…
View article: Investigating Silicate, Carbon, and Water in the Diffuse Interstellar Medium: The First Shots from WISCI
Investigating Silicate, Carbon, and Water in the Diffuse Interstellar Medium: The First Shots from WISCI Open
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 reaction surface to form complex molecules, and is the feedstoc…
View article: The wind properties of O-type stars at sub-SMC metallicity
The wind properties of O-type stars at sub-SMC metallicity Open
Context . Powerful radiation-driven winds heavily influence the evolution and end-of-life products of massive stars. Feedback processes from these winds strongly impact the thermal and dynamical properties of the interstellar medium of the…
View article: X-Shooting ULLYSES: Massive stars at low metallicity
X-Shooting ULLYSES: Massive stars at low metallicity Open
Context . Mass loss governs the evolution of massive stars and shapes the stellar surroundings. To quantify the impact of the stellar winds, we need to know the exact mass-loss rates; however, empirical constraints on the rates are hampere…
View article: ALMA detections of circumstellar disks in the giant H II region M17
ALMA detections of circumstellar disks in the giant H II region M17 Open
Context . Our current understanding is that intermediate- to high-mass stars form in a way similar to low-mass stars, through disk accretion. The expected shorter formation timescales, higher accretion rates, and increasingly strong radiat…
View article: ALMA detections of circumstellar disks in the giant Hii region M17. Probing the intermediate- to high-mass pre-main-sequence population
ALMA detections of circumstellar disks in the giant Hii region M17. Probing the intermediate- to high-mass pre-main-sequence population Open
Our current understanding is that intermediate- to high-mass stars form in a way similar to low-mass stars, that is, through disk accretion. However, the physical conditions that play a role in disk formation, evolution, and the possibilit…
View article: X-Shooting ULLYSES: Massive stars at low metallicity VI. Atmosphere and mass-loss properties of O-type giants in the Small Magellanic Cloud
X-Shooting ULLYSES: Massive stars at low metallicity VI. Atmosphere and mass-loss properties of O-type giants in the Small Magellanic Cloud Open
Mass loss through a stellar wind is an important physical process that steers the evolution of massive stars and controls the properties of their end-of-life products, such as the supernova type and the mass of compact remnants. For an acc…
View article: X-Shooting ULLYSES: Massive stars at low metallicity
X-Shooting ULLYSES: Massive stars at low metallicity Open
Context. Mass loss through a stellar wind is an important physical process that steers the evolution of massive stars and controls the properties of their end-of-life products, such as the supernova type and the mass of compact remnants. T…
View article: X-Shooting ULLYSES: Massive Stars at low metallicity
X-Shooting ULLYSES: Massive Stars at low metallicity Open
Context. Current implementations of mass loss for hot, massive stars in stellar evolution models usually include a sharp increase in mass loss when blue supergiants become cooler than T eff ∼ 20 − 22 kK. Such a drastic mass-loss jump has t…
View article: X-Shooting ULLYSES: Massive Stars at low metallicity IX: Empirical constraints on mass-loss rates and clumping parameters for OB supergiants in the Large Magellanic Cloud
X-Shooting ULLYSES: Massive Stars at low metallicity IX: Empirical constraints on mass-loss rates and clumping parameters for OB supergiants in the Large Magellanic Cloud Open
Context. Current implementations of mass loss for hot, massive stars in stellar evolution models include a sharp increase in mass loss when blue supergiants become cooler than Teff 20-22kK. This drastic mass-loss jump has been motivated by…
View article: The spectroscopic binary fraction of the young stellar cluster M17
The spectroscopic binary fraction of the young stellar cluster M17 Open
Context. Significant progress has been made toward understanding the formation of massive ( M > 8 M ⊙ ) binaries in close orbits (with periods of less than a month). Some of the observational studies leading to this progress are the detect…
View article: Properties of intermediate- to high-mass stars in the young cluster M17
Properties of intermediate- to high-mass stars in the young cluster M17 Open
Context . The outcome of the formation of massive stars is an important anchor point in the formation and evolution process of these stars. It provides insight into the physics of the assembly process, and sets the conditions for stellar e…
View article: Properties of intermediate- to high-mass stars in the young cluster M17 -- Characterizing the (pre-)zero-age main sequence
Properties of intermediate- to high-mass stars in the young cluster M17 -- Characterizing the (pre-)zero-age main sequence Open
The outcome of the formation of massive stars is an important anchor point in their evolution. It provides insight into the physics of the assembly process, and sets the conditions for stellar evolution. We characterize a population of 18 …
View article: X-Shooting ULLYSES: Massive stars at low metallicity
X-Shooting ULLYSES: Massive stars at low metallicity Open
Context. The spectral analysis of hot, massive stars is a fundamental astrophysical method of determining their intrinsic properties and feedback. With their inherent, radiation-driven winds, the quantitative spectroscopy for hot, massive …
View article: X-Shooting ULLYSES: Massive stars at low metallicity
X-Shooting ULLYSES: Massive stars at low metallicity Open
Context . The XShootU project aims to obtain ground-based optical to near-infrared spectroscopy of all targets observed by the Hubble Space Telescope (HST) under the Director’s Discretionary program ULLYSES. Using the medium-resolution spe…
View article: X-Shooting ULLYSES: Massive stars at low metallicity
X-Shooting ULLYSES: Massive stars at low metallicity Open
On the route toward merging neutron stars and stripped-envelope supernovae, binary population synthesis predicts a large number of post-interaction systems with massive stars that have been stripped of their outer layers. However, observat…
View article: Binarity at LOw Metallicity (BLOeM): a spectroscopic VLT monitoring survey of massive stars in the SMC
Binarity at LOw Metallicity (BLOeM): a spectroscopic VLT monitoring survey of massive stars in the SMC Open
Surveys in the Milky Way and Large Magellanic Cloud revealed that the majority of massive stars will interact with companions during their lives. However, knowledge of the binary properties of massive stars at low metallicity, which approa…
View article: X-Shooting ULLYSES: Massive stars at low metallicity. IV. Spectral analysis methods and exemplary results for O stars
X-Shooting ULLYSES: Massive stars at low metallicity. IV. Spectral analysis methods and exemplary results for O stars Open
CONTEXT: The spectral analysis of hot, massive stars is a fundamental astrophysical method to obtain their intrinsic properties and their feedback. Quantitative spectroscopy for hot, massive stars requires detailed numerical modeling of th…
View article: X-Shooting ULLYSES: Massive Stars at low metallicity VIII. Stellar and wind parameters of newly revealed stripped stars in Be binaries
X-Shooting ULLYSES: Massive Stars at low metallicity VIII. Stellar and wind parameters of newly revealed stripped stars in Be binaries Open
On the route towards merging neutron stars and stripped-envelope supernovae, binary population synthesis predicts a large number of post-interaction systems with massive stars that have stripped off their outer layers. Yet, observations of…
View article: Disk Evolution Study Through Imaging of Nearby Young Stars (DESTINYS): PDS 111, an old T Tauri star with a young-looking disk
Disk Evolution Study Through Imaging of Nearby Young Stars (DESTINYS): PDS 111, an old T Tauri star with a young-looking disk Open
Context . The interplay between T Tauri stars and their circumstellar disks, and how this impacts the onset of planet formation has yet to be established. In the last years, major progress has been made using instrumentation that probes th…
View article: Disk Evolution Study Through Imaging of Nearby Young Stars (DESTINYS): PDS 111, an old T Tauri star with a young-looking disk
Disk Evolution Study Through Imaging of Nearby Young Stars (DESTINYS): PDS 111, an old T Tauri star with a young-looking disk Open
The interplay between T Tauri stars and their circumstellar disks, and how this impacts the onset of planet formation has yet to be established. We studied a seemingly old T Tauri star, PDS 111, and its disk. We analyzed optical, infrared,…
View article: Exploring the directly imaged HD 1160 system through spectroscopic characterization and high-cadence variability monitoring
Exploring the directly imaged HD 1160 system through spectroscopic characterization and high-cadence variability monitoring Open
The time variability and spectra of directly imaged companions provide insight into their physical properties and atmospheric dynamics. We present follow-up R ∼ 40 spectrophotometric monitoring of red companion HD 1160 B at 2.8–4.2 μm usin…
View article: X-Shooting ULLYSES: Massive Stars at Low Metallicity
X-Shooting ULLYSES: Massive Stars at Low Metallicity Open
The Hubble Space Telescope has devoted 500 orbits to observing 250 massive stars with low metallicity in the ultraviolet (UV) range within the framework of the ULLYSES program. The X-Shooting ULLYSES (XShootU) project enhances the legacy v…
View article: Spectroscopic variability of massive pre-main-sequence stars in M17
Spectroscopic variability of massive pre-main-sequence stars in M17 Open
Context . It is a challenge to study the formation process of massive stars: their formation time is short, there are only few of them, they are often deeply embedded, and they lie at relatively large distances. Our strategy is to study th…
View article: Spectroscopic variability of massive pre-main-sequence stars in M17
Spectroscopic variability of massive pre-main-sequence stars in M17 Open
It is a challenge to study the formation process of massive stars: their formation time is short, they are few, often deeply embedded, and at relatively large distances. Our strategy is to study the outcome of the star formation process an…
View article: Massive pre-main-sequence stars in M17
Massive pre-main-sequence stars in M17 Open
Context. Recently much progress has been made in probing the embedded stages of massive star formation, pointing to formation scenarios that are reminiscent of a scaled-up version of low-mass star formation. However, the latest stages of m…