Search Publications
SOLES XII. The Aligned Orbit of TOI-2533 b, a Transiting Brown Dwarf Orbiting an F8-type Star
Rice, Malena; Wang, Songhu; Wang, Xian-Yu +1 more
Brown dwarfs occupy a middle ground in mass space between gaseous giant planets and ultracool dwarf stars, and the characterisation of their orbital orientations may shed light on how these neighbouring objects form. We present an analysis of the Rossiter–McLaughlin effect across the transit of TOI-2533 b, a brown dwarf on a moderately eccentric (…
The Importance of Optical Wavelength Data on Atmospheric Retrievals of Exoplanet Transmission Spectra
MacDonald, Ryan J.; Wakeford, Hannah R.; Fairman, Charlotte
Exoplanet transmission spectra provide rich information about the chemical composition, clouds, and temperature structure of exoplanet atmospheres. Most exoplanet transmission spectra only span infrared wavelengths (≳1 µm), which can preclude crucial atmospheric information from shorter wavelengths. Here, we explore how retrieved atmospheric…
The stellar mass function of quiescent galaxies in 2 < z < 2.5 protoclusters
Cooper, M. C.; Muzzin, Adam; Forrest, Ben +21 more
We present an analysis of the galaxy stellar mass function (SMF) of 14 known protoclusters between 2.0 < z < 2.5 in the COSMOS field, down to a mass limit of 109.5 M⊙. We use existing photometric redshifts with a statistical background subtraction, and consider star-forming and quiescent galaxies identified from (NUV - …
FRESCO: The Paschen-α Star-forming Sequence at Cosmic Noon
Maseda, Michael V.; van Dokkum, Pieter; Reddy, Naveen A. +17 more
We present results from the JWST First Reionization Epoch Spectroscopically Complete Observations survey on the star-forming sequence (SFS) of galaxies at 1.0 < z < 1.7, around the peak of the cosmic star formation history. Star formation rates (SFRs) are measured from the redshifted, relatively dust-insensitive Paschen-α emission line, and …
Nontensorial gravitational wave polarizations from the tensorial degrees of freedom: Linearized Lorentz-violating theory of gravity
Zhu, Zong-Hong; Hou, Shaoqi; Zhu, Tao +1 more
General relativity predicts the existence of only two tensorial gravitational wave polarizations, while a generic metric theory of gravity can possess up to four additional polarizations, including two vectors and two scalar ones. These vector/scalar polarizations are in general generated by the intrinsic new vector/scalar degrees of freedom of th…
The Giant Molecular Cloud G148.24+00.41: gas properties, kinematics, and cluster formation at the nexus of filamentary flows
Zavagno, A.; Samal, M. R.; Ojha, D. K. +9 more
Filamentary flows towards the centre of molecular clouds have been recognized as a crucial process in the formation and evolution of stellar clusters. In this paper, we present a comprehensive observational study that investigates the gas properties and kinematics of the Giant Molecular Cloud G148.24+00.41 using the observations of CO (1-0) isotop…
The JWST Resolved Stellar Populations Early Release Science Program. VI. Identifying Evolved Stars in Nearby Galaxies
Gennaro, Mario; McQuinn, Kristen B. W.; Dolphin, Andrew E. +20 more
We present an investigation of evolved stars in the nearby star-forming galaxy Wolf–Lundmark–Melotte (WLM), using Near-Infrared Camera (NIRCam) imaging from the JWST Resolved Stellar Populations Early Release Science program. We find that various combinations of the F090W, F150W, F250M, and F430M filters can effectively isolate red supergiants and…
JOYS+: Mid-infrared detection of gas-phase SO2 emission in a low-mass protostar. The case of NGC 1333 IRAS 2A: Hot core or accretion shock?
Chen, Y.; van Dishoeck, E. F.; Nazari, P. +18 more
Context. Thanks to the Mid-InfraRed Instrument (MIRI) on the James Webb Space Telescope (JWST), our ability to observe the star formation process in the infrared has greatly improved. Due to its unprecedented spatial and spectral resolution and sensitivity in the mid-infrared, JWST/MIRI can see through highly extincted protostellar envelopes and p…
The IACOB project: XII. New grid of northern standards for the spectral classification of B-type stars
Simón-Díaz, S.; de Burgos, A.; Negueruela, I. +2 more
Context. With the advent of large spectroscopic surveys, automated stellar parameter determination has become commonplace. Nevertheless, spectral classification still offers a quick and useful alternative for obtaining parameter estimates for large samples of spectra of varying quality. Aims. We present a new atlas of stellar spectra covering the …
CHEX-MATE: Turbulence in the intra-cluster medium from X-ray surface brightness fluctuations
Pointecouteau, E.; Pratt, G. W.; Rossetti, M. +15 more
The intra-cluster medium is prone to turbulent motion that will contribute to the non-thermal heating of the gas, complicating the use of galaxy clusters as cosmological probes. Indirect approaches can estimate the intensity and structure of turbulent motions by studying the associated fluctuations in gas density and X-ray surface brightness. In t…