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ALMA 400 pc Imaging of a z = 6.5 Massive Warped Disk Galaxy
(2023-12-01)
We present 0.″075 (≈400 pc) resolution Atacama Large Millimeter/submillimeter Array (ALMA) observations of the [C ii] and dust continuum emission from the host galaxy of the z = 6.5406 quasar, P036+03. We find that the ...
The cosmic build-up of dust and metals : Accurate abundances from GRB-selected star-forming galaxies at 1.7 < z < 6.3
(2023-11-15)
The chemical enrichment of dust and metals in the interstellar medium of galaxies throughout cosmic time is one of the key driving processes of galaxy evolution. Here we study the evolution of the gas-phase metallicities, ...
VVV-WIT-12 and Its Fashionable Nebula: A 4 yr Long-period Young Stellar Object with a Light Echo?
(2023-11-14)
We report the serendipitous discovery of VVV-WIT-12, an unusual variable source that seems to induce variability in its surrounding nebula. The source belongs to the rare objects that we call WITs (short for What Is This?) ...
Clustering Properties of Intermediate and High-mass Young Stellar Objects
(2023-11-01)
We have selected 337 intermediate- and high-mass young stellar objects (YSOs; 1.5–20 M ⊙) well-characterized with spectroscopy. By means of the clustering algorithm HDBSCAN, we study their clustering and association ...
The Chandra Cygnus OB2 Legacy Survey: Design and X-Ray Point-source Catalog
(2023-11-01)
The Cygnus OB2 association is the largest concentration of young and massive stars within 2 kpc of the Sun, including an estimated ∼65 O-type stars and hundreds of OB stars. The Chandra Cygnus OB2 Legacy Survey is a large ...
Classification of Chandra X-Ray Sources in Cygnus OB2
(2023-11-01)
We have devised a predominantly Naive Bayes−based method to classify X-ray sources detected by Chandra in the Cygnus OB2 association into members, foreground objects, and background objects. We employ a variety of X-ray, ...
A LOFAR prompt search for radio emission accompanying X-ray flares in GRB 210112A
(2023-11-01)
The composition of relativistic gamma-ray burst (GRB) jets and their emission mechanisms are still debated, and they could be matter or magnetically dominated. One way to distinguish these mechanisms arises because a ...
JADES Initial Data Release for the Hubble Ultra Deep Field: Revealing the Faint Infrared Sky with Deep JWST NIRCam Imaging
(2023-11-01)
JWST has revolutionized the field of extragalactic astronomy with its sensitive and high-resolution infrared view of the distant Universe. Adding to the new legacy of JWST observations, we present the first NIRCam imaging ...
Simba-c : An updated chemical enrichment model for galactic chemical evolution in the SIMBA simulation
(2023-10-30)
We introduce a new chemical enrichment and stellar feedback model into GIZMO, using the SIMBA sub-grid models as a base. Based on the state-of-the-art chemical evolution model of Kobayashi et al., SIMBA-C tracks 34 elements ...
GA-NIFS: Black hole and host galaxy properties of two z-6.8 quasars from the NIRSpec IFU
(2023-10-20)
Aims. Integral field spectroscopy (IFS) with JWST NIRSpec will significantly improve our understanding of the first quasars, by providing spatially resolved, infrared spectroscopic capabilities that cover key rest-frame ...