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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…
The evolution of hot Jupiters revealed by the age distribution of their host stars
Huang, Yang; Dong, Subo; Luo, A. -Li +11 more
Hot Jupiters are the first exoplanet population discovered around main-sequence stars. However, their origin and evolution remain puzzled. Using a sample with kinematic properties derived from large surveys (e.g., Gaia, LAMOST), we characterize the kinematic ages of stars hosting hot and warm/cold Jupiters, confirming the result of the previous st…
Photometry and astrometry with JWST - III. A NIRCam-Gaia DR3 analysis of the open cluster NGC 2506
Salaris, M.; Bedin, L. R.; Nardiello, D. +3 more
In the third paper of this series aimed at developing the tools for analysing resolved stellar populations using the cameras on board of the James Webb Space Telescope (JWST), we present a detailed multiband study of the 2 Gyr Galactic open cluster NGC 2506. We employ public calibration data sets collected in multiple filters to: (i) derive improv…
Tidally locked rotation of the dwarf planet (136199) Eris discovered via long-term ground-based and space photometry
Greiner, J.; Pál, A.; Marton, G. +9 more
The rotational states of the members in the dwarf planet-satellite systems in the trans-Neptunian region are determined by formation conditions and the tidal interaction between the components. These rotational characteristics serve as prime tracers of their evolution. A number of authors have claimed a very broad range of values for the rotation …