Search Publications
The formation of the young massive cluster B1 in the Antennae Galaxies (NGC 4038/NGC 4039) triggered by cloud-cloud collision
Tokuda, Kazuki; Tachihara, Kengo; Ueda, Junko +4 more
The Antennae Galaxies, one of major mergers, are a starburst. Tsuge et al. (2020, PASJ, 73, S35) showed that the five giant molecular complexes in the Antennae Galaxies have signatures of cloud-cloud collisions based on the Atacama Large Millimeter Array (ALMA) archival data with 60 pc resolution. In the present work we analyzed the new CO data to…
Multi-Wavelength Properties of the 2021 Periastron Passage of PSR B1259-63
Santangelo, Andrea; Pühlhofer, Gerd; Chernyakova, Maria +9 more
PSR B1259-63 is a gamma-ray binary system hosting a radio pulsar orbiting around a O9.5Ve star, LS 2883, with a period of ∼3.4 years. The interaction of the pulsar wind with the LS 2883 outflow leads to unpulsed broadband emission in the radio, X-ray, GeV, and TeV domains. One of the most unusual features of the system is an outburst of GeV energi…
Coherent radio emission from a population of RS Canum Venaticorum systems
Callingham, J. R.; Shimwell, T. W.; Vedantham, H. K. +5 more
Coherent radio emission from stars can be used to constrain fundamental coronal plasma parameters, such as plasma density and magnetic field strength. It is also a probe of chromospheric and magnetospheric acceleration mechanisms. Close stellar binaries, such as RS Canum Venaticorum (RS CVn) systems, are particularly interesting as their heightene…
The ultraluminous X-ray source bubble in NGC 5585
Motch, C.; Miller-Jones, J. C. A.; Soria, R. +4 more
Some ultraluminous X-ray sources (ULXs) are surrounded by collisionally ionized bubbles, larger and more energetic than supernova remnants: they are evidence of the powerful outflows associated with super-Eddington X-ray sources. We illustrate the most recent addition to this class: a huge (350 pc × 220 pc in diameter) bubble around a ULX in NGC 5…
A global view on star formation: the GLOSTAR Galactic plane survey. III. 6.7 GHz methanol maser survey in Cygnus X
Beuther, Henrik; Wyrowski, Friedrich; Gong, Yan +16 more
The Cygnus X complex is covered by the Global View of Star Formation in the Milky Way (GLOSTAR) survey, an unbiased radio-wavelength Galactic plane survey, in 4-8 GHz continuum radiation and several spectral lines. The GLOSTAR survey observed the 6.7 GHz transition of methanol (CH3OH), an exclusive tracer of high-mass young stellar obje…
Multiplicity among the cool supergiants in the Magellanic Clouds
Dorda, R.; Patrick, L. R.
The characterization of multiplicity of high-mass stars is of fundamental importance to understand their evolution, the diversity of observed core-collapse supernovae and the formation of gravitational wave progenitor systems. Despite that, until recently, one of the final phases of massive star evolution - the cool supergiant phase - has received…
ESPRESSO mass determination of TOI-263b: an extreme inhabitant of the brown dwarf desert
Mustill, A. J.; Zapatero Osorio, M. R.; Zechmeister, M. +8 more
The TESS mission has reported a wealth of new planetary systems around bright and nearby stars amenable for detailed characterizations of planet properties and atmospheres. However, not all interesting TESS planets orbit around bright host stars. TOI-263 b is a validated ultra-short-period substellar object in a 0.56-day orbit around a faint (V = …
Catalog of Long-term Transient Sources in the First 10 yr of Fermi-LAT Data
Troja, E.; Caraveo, P. A.; Mirabal, N. +114 more
We present the first Fermi Large Area Telescope (LAT) catalog of long-term γ-ray transient sources (1FLT). This comprises sources that were detected on monthly time intervals during the first decade of Fermi-LAT operations. The monthly timescale allows us to identify transient and variable sources that were not yet reported in other Fermi-LAT cata…
Supernovae producing unbound binaries and triples
Kochanek, C. S.
The fraction of stars that are in binaries or triples at the time of stellar death and the fraction of these systems that survive the supernova explosion are crucial constraints for evolution models and predictions for gravitational wave source populations. These fractions are also subject to direct observational determination. Here, we search 10 …
Characterizing the Protolunar Disk of the Accreting Companion GQ Lupi B
Kesseli, Aurora Y.; Brinchmann, Jarle; Milli, Julien +11 more
GQ Lup B is a young and accreting, substellar companion that appears to drive a spiral arm in the circumstellar disk of its host star. We report high-contrast imaging observations of GQ Lup B with VLT/NACO at 4-5 µm and medium-resolution integral field spectroscopy with VLT/MUSE. The optical spectrum is consistent with an M9 spectral type, s…