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JWST's PEARLS: TN J1338-1942 - I. Extreme jet-triggered star formation in a z = 4.11 luminous radio galaxy
Grogin, Norman A.; Holwerda, Benne W.; Hutchison, Taylor A. +25 more
We present the first JWST observations of the z = 4.11 luminous radio galaxy TN J1338-1942, obtained as part of the 'Prime Extragalactic Areas for Reionization and Lensing Science' ('PEARLS') project. Our NIRCam observations, designed to probe the key rest-frame optical continuum and emission line features at this redshift, enable resolved spectra…
CHRONOSTAR - II. Kinematic age and substructure of the Scorpius-Centaurus OB2 association
Žerjal, Maruša; Ireland, Michael J.; Krumholz, Mark R. +2 more
The nearest region of massive star formation - the Scorpius-Centaurus OB2 association (Sco-Cen) - is a local laboratory ideally suited to the study of a wide range of astrophysical phenomena. Precision astrometry from the Gaia mission has expanded the census of this region by an order of magnitude. However, Sco-Cen's vastness and complex substruct…
Reading the tea leaves in the Mbh-M*,sph and Mbh-Re,sph diagrams: dry and gaseous mergers with remnant angular momentum
Graham, Alister W.; Sahu, Nandini
We recently revealed that bulges and elliptical galaxies broadly define distinct, superlinear relations in the (black hole mass, Mbh)-(spheroid stellar mass, M*,sph) diagram or Mbh-M*,sph diagram, with the order-of-magnitude lower Mbh/M*,sph ratios in the elliptical galaxies due to …
Stellar Rotation and Structure of the α Persei Complex: When Does Gyrochronology Start to Work?
Bouma, Luke G.; Boyle, Andrew W.
On the pre-main sequence, the rotation rates of Sun-like stars are dictated by the interplay between the protostellar disk and the star's contraction. At ages exceeding 100 Myr, magnetic spindown erases the initial stellar spin rate and enables rotation-based age dating (gyrochronology). The exact time at which the transition between these two reg…
A Candidate Runaway Supermassive Black Hole Identified by Shocks and Star Formation in its Wake
van den Bosch, Frank C.; van Dokkum, Pieter; Romanowsky, Aaron J. +13 more
The interaction of a runaway supermassive black hole (SMBH) with the circumgalactic medium (CGM) can lead to the formation of a wake of shocked gas and young stars behind it. Here we report the serendipitous discovery of an extremely narrow linear feature in Hubble Space Telescope (HST) Advanced Camera for Surveys images that may be an example of …
The Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Quasar Survey: Quasar Properties from Data Releases 6 to 9
Yao, Su; Jin, Jun-Jie; Wu, Xue-Bing +10 more
We report the fourth installment in the series of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) quasar survey, which includes quasars observed between 2017 September and 2021 June. There are in total 13,066 quasars reliably identified, of which 6685 are newly discovered that are not reported in the Sloan Digital Sky Survey…
Quantifying the energy balance between the turbulent ionised gas and young stars
Leroy, Adam K.; Meidt, Sharon E.; Glover, Simon C. O. +19 more
Context. Stellar feedback is a key contributor to the morphology and dynamics of the interstellar medium in star-forming galaxies. In particular, energy and momentum input from massive stars can drive the turbulent motions in the gas, but the dominance and efficiency of this process are unclear. The study of ionised superbubbles enables quantitati…
A Near-infrared-faint, Far-infrared-luminous Dusty Galaxy at z ∼ 5 in COSMOS-Web
Casey, Caitlin M.; Kartaltepe, Jeyhan S.; Koekemoer, Anton M. +32 more
A growing number of far-infrared (FIR) bright sources completely invisible in deep extragalactic optical surveys hint at an elusive population of z > 4 dusty, star-forming galaxies. Cycle 1 JWST surveys are now detecting their rest-frame optical light, which provides key insight into their stellar properties and statistical constraints on the p…
Updated constraints and future prospects on majoron dark matter
Akita, Kensuke; Niibo, Michiru
Majorons are (pseudo-)Nambu-Goldstone bosons associated with lepton number symmetry breaking due to the Majorana mass term of neutrinos introduced in the seesaw mechanism. They are good dark matter candidates since their lifetime is suppressed by the lepton number breaking scale. We update constraints and discuss future prospects on majoron dark m…
New Chondritic Bodies Identified in Eight Oxygen-bearing White Dwarfs
Weinberger, Alycia J.; Zuckerman, B.; Dufour, Patrick +8 more
We present observations and analyses of eight white dwarf stars (WDs) that have accreted rocky material from their surrounding planetary systems. The spectra of these helium-atmosphere WDs contain detectable optical lines of all four major rock-forming elements (O, Mg, Si, and Fe). This work increases the sample of oxygen-bearing WDs with parent b…