Search Publications
Acceleration of suprathermal protons near an interplanetary shock
Wang, L.; Rodríguez-Pacheco, J.; Wimmer-Schweingruber, R. F. +12 more
Context. Interplanetary collisionless shocks are known to be sources of energetic charged particles up to hundreds of MeV. However, the underlying acceleration mechanisms are still under debate.
Aims: We determine the properties of suprathermal protons accelerated by the interplanetary shock on 2021 November 3 with the unprecedented high-reso…
Intracluster light in the core of z ∼ 2 galaxy proto-clusters
Matharu, J.; Mei, S.; Gonzalez, A. H. +5 more
Intracluster light is thought to originate from stars that were ripped away from their parent galaxies by gravitational tides and galaxy interactions during the build up of the cluster. The stars from such interactions will accumulate over time, so semi-analytic models suggest that the abundance of intracluster stars is negligible in young proto-c…
Transition disc nature of post-AGB binary systems confirmed by mid-infrared interferometry
Cuello, N.; Mérand, A.; Van Winckel, H. +4 more
Context. Many properties of circumbinary discs around evolved post-asymptotic giant branch (post-AGB) binary systems are similar to those of protoplanetary discs around young stars. The deficits of near-infrared (near-IR) flux in the spectral energy distributions (SEDs) of these systems hints towards large dust-free cavities that are reminiscent o…
Fragmentation of the High-mass "Starless" Core G10.21-0.31: A Coherent Evolutionary Picture for Star Formation
Wang, Ke; Xu, Fengwei; Pillai, Thushara G. S. +3 more
G10.21-0.31 is a 70 µm dark high-mass starless core (M > 300 M ⊙ within r < 0.15 pc) identified in the Spitzer, Herschel, and APEX continuum surveys, and is believed to harbor the initial stages of high-mass star formation. We present Atacama Large Millimeter/submillimeter Array (ALMA) and Submillimeter Array observations to…
A Multiwavelength Investigation of Dust and Stellar Mass Distributions in Galaxies: Insights from High-resolution JWST Imaging
Kodama, Tadayuki; Morishita, Takahiro; Liu, Zhaoran
We study the morphological properties of mid-infrared selected galaxies at 1.0 < z < 1.7 in the SMACS J0723.3-7327 cluster field to investigate the mechanisms of galaxy mass assembly and structural formation at cosmic noon. We develop a new algorithm to decompose the dust and stellar components of individual galaxies by using high-resolution…
EMPRESS. XI. SDSS and JWST Search for Local and z 4-5 Extremely Metal-poor Galaxies (EMPGs): Clustering and Chemical Properties of Local EMPGs
Ono, Yoshiaki; Ouchi, Masami; Harikane, Yuichi +16 more
We search for local extremely metal-poor galaxies (EMPGs), selecting photometric candidates by broadband color excess and machine-learning techniques with the SDSS photometric data. After removing stellar contaminants by shallow spectroscopy with Seimei and Nayuta telescopes, we confirm that three candidates are EMPGs with 0.05-0.1 Z ⊙ …
JOYS: Disentangling the warm and cold material in the high-mass IRAS 23385+6053 cluster
Östlin, G.; Güdel, M.; Ray, T. P. +20 more
Context. High-mass star formation occurs in a clustered mode where fragmentation is observed from an early stage onward. Young protostars can now be studied in great detail with the recently launched James Webb Space Telescope (JWST).
Aims: We study and compare the warm (>100 K) and cold (<100 K) material toward the high-mass star-formi…
A Gaia astrometric view of the open clusters Pleiades, Praesepe, and Blanco 1
García-Varela, Alejandro; Alfonso, Jeison
Context. Nearby open clusters, such as Pleiades, Praesepe, and Blanco 1, have been extensively studied due to their proximity to the Sun. The Gaia data provide the opportunity to investigate these clusters, because they contain valuable astrometric and photometric information that can be used to update their kinematic and stellar properties.
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New X-ray detections of magnetic period-bounce cataclysmic variables from XMM-Newton and SRG/eROSITA
Stelzer, Beate; Schwope, Axel; de Martino, Domitilla +1 more
Context. A great portion of the cataclysmic variable population, between 40% and 70%, is predicted to be made up of period-bouncers, systems with degenerate donors that have evolved past the period minimum. However, due to their intrinsic faintness, only a few of these systems have been observed and confidently identified so far.
Aims: We hav…
Eccentric Dust Ring in the IRS 48 Transition Disk
Li, Zhi-Yun; Yang, Haifeng; Looney, Leslie W. +4 more
Crescent-shaped structures in transition disks hold the key to studying the putative companions to the central stars. The dust dynamics, especially that of different grain sizes, is important to understanding the role of pressure bumps in planet formation. In this work, we present deep dust continuum observation with high resolution toward the Oph…