232 citations · 987 across the 25 of their papers we have counts for
27 papers
The star formation history of Orion is structured and episodic
Alena Rottensteiner, João Alves, Stefan Meingast +6
The propagation of star formation throughout a molecular cloud complex can tell us much about its physical drivers and the importance of environmental versus intrinsic processes. W…
The fading hierarchy of Galactic open clusters
Guimei Liu, João Alves, Yu Zhang +7
Galactic open clusters provide a record of both hierarchical star formation and the subsequent dynamical evolution of the Milky Way disk. We use the two-point correlation function…
Accelerated gas flow along Ophiuchus B44 filament: Breaking Position-Position-Velocity degeneracy
J. Alves, C. Zucker, C. Lada +15
(Abridged) Stellar feedback from massive stars in the Upper-Sco has been proposed to have reshaped the gas in the nearby Ophiuchus complex. In this framework, feedback organizes th…
Precise determination of circumstellar disk lifetimes: Disk evolution in a single star-forming region
Fabian A. Polnitzky, Sebastian Ratzenböck, Josefa E. Großschedl +1
Determining how long circumstellar disks last is key to understanding the timescale of planet formation. Typically, this is done by measuring the fraction of young stars with infra…
The evolution of velocity dispersion in the Sco-Cen OB association
Josefa E. Großschedl, João Alves, Sebastian Ratzenböck +4
We study how the stellar velocity dispersion within the Scorpius-Centaurus OB association (Sco-Cen) has evolved over approximately 20 million years, from its formation to the prese…
The velocity field of the Scorpius-Centaurus OB association
S. Hutschenreuter, J. Alves, L. Posch +5
We present a non-parametric reconstruction of the three-dimensional velocity field of the Scorpius-Centaurus OB association (Sco- Cen). Using Gaia DR3 astrometry and radial velocit…
The late Miocene Be anomaly and the possibility of a supernova
E. Maconi, J. Alves, J. Großschedl +3
Recent measurements of cosmogenic Be in deep-ocean ferromanganese crusts from the Central and Northern Pacific have revealed an anomalous concentration between 11.5 and 9.0…
The Solar System's passage through the Radcliffe wave during the middle Miocene
E. Maconi, J. Alves, C. Swiggum +14
Context. As the Solar System orbits the Milky Way, it encounters various Galactic environments, including dense regions of the interstellar medium (ISM). These encounters can compr…
The TW Hydrae Association is a cluster chain of Sco-Cen
N. Miret-Roig, J. Alves, S. Ratzenböck +9
The TW Hydrae Association (TWA) is a young local association (YLA) about 50 pc from the Sun, offering a unique opportunity to study star and planet formation processes in detail. W…
The physical properties of Cluster Chains
Laura Posch, João Alves, Nuria Mirét-Roig +5
We explore the kinematics and star formation history of the Scorpius Centaurus (Sco-Cen) OB association following the initial identification of sequential, linearly aligned chains…
Most nearby young star clusters formed in three massive complexes
Cameren Swiggum, João Alves, Robert Benjamin +9
Efforts to unveil the structure of the local interstellar medium and its recent star formation history have spanned the past seventy years. Recent studies utilizing precise data fr…
Emergence of high-mass stars in complex fiber networks (EMERGE). I. Early ALMA Survey: observations and massive data reduction
A. Hacar, A. Socci, F. Bonanomi +10
(Abridged) Recent molecular surveys have revealed a rich gas organization of sonic-like fibers in all kind of environments prior to the formation of low- and high-mass stars. This…
The Corona Australis star formation complex is accelerating away from the Galactic plane
L. Posch, N. Miret-Roig, J. Alves +5
We study the kinematics of the recently discovered Corona Australis (CrA) chain of clusters by examining the 3D space motion of its young stars using Gaia DR3 and APOGEE-2 data. Wh…
VISIONS: The VISTA Star Formation Atlas -- I. Survey overview
Stefan Meingast, João Alves, Hervé Bouy +37
VISIONS is an ESO public survey of five nearby (d < 500 pc) star-forming molecular cloud complexes that are canonically associated with the constellations of Chamaeleon, Corona Aus…
The star formation history of the Sco-Cen association. Coherent star formation patterns in space and time
Sebastian Ratzenböck, Josefa E. Großschedl, João Alves +13
We reconstruct the star formation history of the Sco-Cen OB association using a novel high-resolution age map of the region. We develop an approach to produce robust ages for Sco-C…
A 3D View of Orion: I. Barnard's Loop
Michael M. Foley, Alyssa Goodman, Catherine Zucker +11
Barnard's Loop is a famous arc of H emission located in the Orion star-forming region. Here, we provide evidence of a possible formation mechanism for Barnard's Loop and compare…
Significance Mode Analysis (SigMA) for hierarchical structures. An application to the Sco-Cen OB association
Sebastian Ratzenböck, Josefa E. Großschedl, Torsten Möller +3
We present a new clustering method, Significance Mode Analysis (SigMA), to extract co-spatial and co-moving stellar populations from large-scale surveys such as ESA Gaia. The metho…
The Oph region revisited with Gaia EDR3
Natalie Grasser, Sebastian Ratzenböck, João Alves +10
Context. Young and embedded stellar populations are important probes of the star formation process. Paradoxically, we have a better census of nearby embedded young populations than…
Evidence for Radial Expansion at the Core of the Orion Complex with Gaia EDR3
Cameren Swiggum, Elena D'Onghia, João Alves +6
We present a phase-space study of two stellar groups located at the core of the Orion complex: Briceño-1 and Orion Belt Population-near (OBP-near). We identify the groups with the…
3D dynamics of the Orion cloud complex -- Discovery of coherent radial gas motions at the 100-pc scale
Josefa E. Großschedl, João Alves, Stefan Meingast +1
We present the first study of the 3D dynamics of the gas in the entire southern Orion cloud complex. We used the parallaxes and proper motions of YSOs from Gaia DR2 as a proxy for…
3D shape of Orion A with Gaia DR2. An informed view on Star Formation Rates and Efficiencies
Josefa E. Großschedl, João Alves, Stefan Meingast +1
The giant molecular cloud Orion A is the closest massive star-forming region to earth ( pc). It contains the rich Orion Nebula Cluster (ONC) in the North, and low-mass st…
VISION - Vienna survey in Orion. III. Young stellar objects in Orion A
Josefa E. Großschedl, João Alves, Paula S. Teixeira +14
We have extended and refined the existing young stellar object (YSO) catalogs for the Orion A molecular cloud, the closest massive star-forming region to Earth. This updated catalo…
3D shape of Orion A from Gaia DR2
Josefa E. Grossschedl, Joao Alves, Stefan Meingast +16
We use the DR2 distances of about 700 mid-infrared selected young stellar objects in the benchmark giant molecular cloud Orion A to infer its 3D shape and orientati…
An ALMA study of the Orion Integral Filament: I. Evidence for narrow fibers in a massive cloud
A. Hacar, M. Tafalla, J. Forbrich +4
Abridged. Are all filaments bundles of fibers? To address this question, we have investigated the gas organization within the paradigmatic Integral Shape Filament (ISF). We combine…