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Chemistry of Complex Organic Molecules in the V883 Ori Disk Revealed by ALMA Band 3 Observations
Aikawa, Yuri; Nomura, Hideko; Yamato, Yoshihide +3 more
Complex organic molecules (COMs) in protoplanetary disks are key to understanding the origin of volatiles in comets in our solar system, yet the chemistry of COMs in protoplanetary disks remains poorly understood. Here, we present Atacama Large Millimeter/submillimeter Array Band 3 observations of the disk around the young outbursting star V883 Or…
Hunting for complex cyanides in protostellar ices with the JWST. A tentative detection of CH3CN and C2H5CN
Manoj, P.; van Dishoeck, E. F.; Nazari, P. +20 more
Nitrogen-bearing complex organic molecules have been commonly detected in the gas phase but not yet in interstellar ices. This has led to the long-standing question of whether these molecules form in the gas phase or in ices. The James Webb Space Telescope (JWST) offers the sensitivity, spectral resolution, and wavelength coverage needed to detect…
Metal-poor stars with disc-like orbits. Possible traces of the Galactic disc at very early epochs
Massari, D.; De Angeli, F.; Riello, M. +5 more
We used photometric metallicity estimates for about 700 000 stars in the surroundings of the Sun, with very accurate distances and 3D motions measures from Gaia DR3, to explore the properties of the metal-poor (−2.0 < [Fe/H] ≤ −1.5; MP) and very metal-poor ([Fe/H] ≤ −2.0; VMP) stars with disc kinematics in the sample. We confirm the presence of…
Binarity at LOw Metallicity (BLOeM): A spectroscopic VLT monitoring survey of massive stars in the SMC
van Loon, J. Th.; Wang, C.; Crowther, P. A. +75 more
Surveys in the Milky Way and Large Magellanic Cloud have 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, and therefore in conditions approaching those of the Early Universe, remain sparse. We present the Binarity at LOw Me…
A temperate super-Jupiter imaged with JWST in the mid-infrared
Henning, Th.; Morley, C. V.; Lagrange, A. -M. +16 more
Of the approximately 25 directly imaged planets to date, all are younger than 500 Myr, and all but six are younger than 100 Myr (ref. 1). Eps Ind A (HD209100, HIP108870) is a K5V star of roughly solar age (recently derived as 3.7–5.7 Gyr (ref. 2) and
Molecular Outflow in the Reionization-epoch Quasar J2054-0005 Revealed by OH 119 µm Observations
Fujimoto, Seiji; Inoue, Akio K.; Hashimoto, Takuya +8 more
Molecular outflows are expected to play a key role in galaxy evolution at high redshift. To study the impact of outflows on star formation at the epoch of reionization, we performed sensitive Atacama Large Millimeter/submillimeter Array observations of OH 119 µm toward J2054-0005, a luminous quasar at z = 6.04. The OH line is detected and ex…
The ALMA-CRISTAL survey: Discovery of a 15 kpc-long gas plume in a z = 4.54 Lyman-α blob
Lutz, D.; Förster Schreiber, N. M.; Veilleux, S. +25 more
Massive star-forming galaxies in the high-redshift universe host large reservoirs of cold gas in their circumgalactic medium (CGM). Traditionally, these reservoirs have been linked to diffuse H I Lyman-α (Lyα) emission extending beyond ≈10 kpc scales. In recent years, millimeter and submillimeter observations have started to identify even colder g…
Taking the Milky Way for a spin: disc formation in the ARTEMIS simulations
Belokurov, Vasily; Dillamore, Adam M.; Font, Andreea S. +1 more
We investigate the formation (spin-up) of galactic discs in the ARTEMIS simulations of Milky Way (MW)-mass galaxies. In almost all galaxies, discs spin up at higher [Fe/H] than the MW. Those galaxies that contain an analogue of the Gaia Sausage-Enceladus (GSE) spin up at a lower average metallicity than those without. We identify six galaxies with…
Detection of X-Ray Polarization from the Blazar 1ES 1959+650 with the Imaging X-Ray Polarimetry Explorer
Ingram, Adam; Kaaret, Philip; Wu, Kinwah +142 more
Observations of linear polarization in the 2–8 keV energy range with the Imaging X-ray Polarimetry Explorer (IXPE) explore the magnetic field geometry and dynamics of the regions generating nonthermal radiation in relativistic jets of blazars. These jets, particularly in blazars whose spectral energy distribution peaks at X-ray energies, emit X-ra…
Supermassive black hole mass in the massive elliptical galaxy M87 from integral-field stellar dynamics using OASIS and MUSE with adaptive optics: assessing systematic uncertainties
Cappellari, Michele; Hartke, Johanna; Simon, David A.
The massive elliptical galaxy M87 has been the subject of several supermassive black hole mass measurements from stellar dynamics, gas dynamics, and recently the black hole shadow by the Event Horizon Telescope. This uniquely positions M87 as a benchmark for alternative black hole mass determination methods. Here, we use stellar kinematics extract…