Search Publications
JWST Sneaks a Peek at the Stellar Morphology of z 2 Submillimeter Galaxies: Bulge Formation at Cosmic Noon
Smail, Ian; Chen, Chian-Chou; Wang, Wei-Hao +6 more
We report morphological analyses of seven submillimeter galaxies (SMGs) at z ~ 2 using the James Webb Space Telescope NIRCam images taken as part of the public CEERS and PRIMER surveys. Through two-dimensional surface brightness profile fitting we find evidence of compact reddened stellar structures in all the SMGs, in particular in the F444W filt…
The [O III]λ5007 equivalent width distribution at z 2: the redshift evolution of the extreme emission line galaxies
Maseda, Michael V.; Bunker, Andrew J.; Tang, Mengtao +2 more
We determine the [O III]λ5007 equivalent width (EW) distribution of $1.700\lt \rm {z}\lt 2.274$ rest-frame ultraviolet (UV)-selected (MUV < -19) star-forming galaxies in the GOODS North and South fields. We make use of deep HDUV broad-band photometry catalogues for selection and 3D-HST WFC3/IR grism spectra for measurement of line pr…
The MUSE eXtremely deep field: first panoramic view of an Mg II emitting intragroup medium
Bacon, Roland; Garel, Thibault; Brinchmann, Jarle +21 more
Using the exquisite data from the MUSE eXtremely Deep Field (MXDF), we report the discovery of an Mg II emission nebula with an area above a 2σ significance level of 1000 proper kpc2. This provides the first panoramic view of the spatial distribution of magnesium in the intragroup medium of a low-mass group of five star-forming galaxies…
Spectral Energy Distributions in Three Deep-drilling Fields of the Vera C. Rubin Observatory Legacy Survey of Space and Time: Source Classification and Galaxy Properties
Yang, Guang; Brandt, W. N.; Leja, Joel +9 more
W-CDF-S, ELAIS-S1, and XMM-LSS will be three Deep-Drilling Fields (DDFs) of the Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST), but their extensive multiwavelength data have not been fully utilized as done in the COSMOS field, another LSST DDF. To prepare for future science, we fit source spectral energy distributions (SEDs) from…
The Value-added Catalog for LAMOST DR8 Low-resolution Spectra
Xiang, Maosheng; Huang, Yang; Yuan, Haibo +3 more
We present a value-added catalog containing stellar parameters estimated from 7.10 million low-resolution spectra for 5.16 million unique stars with spectral signal-to-noise ratios (S/N) higher than 10 obtained by the Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST) Galactic spectroscopic surveys. The catalog presents values of s…
Intrinsic tension in the supernova sector of the local Hubble constant measurement and its implications
Hjorth, Jens; Wojtak, Radosław
We reanalyse observations of Type Ia supernovae (SNe) and Cepheids used in the local determination of the Hubble constant and find strong evidence that SN standardization in the calibration sample (galaxies with observed Cepheids) requires a steeper slope of the colour correction than in the cosmological sample (galaxies in the Hubble flow). The c…
Ultra-diffuse galaxies in the perseus cluster: comparing galaxy properties with globular cluster system richness
Forbes, Duncan A.; Romanowsky, Aaron J.; Brodie, Jean P. +6 more
It is clear that within the class of ultra-diffuse galaxies (UDGs), there is an extreme range in the richness of their associated globular cluster (GC) systems. Here, we report the structural properties of five UDGs in the Perseus cluster based on deep Subaru/Hyper Suprime-Cam imaging. Three appear GC-poor and two appear GC-rich. One of our sample…
Equivalent widths of Lyman α emitters in MUSE-Wide and MUSE-Deep
Richard, J.; Verhamme, A.; Nanayakkara, T. +15 more
Context. The hydrogen Lyman α line is often the only measurable feature in optical spectra of high-redshift galaxies. Its shape and strength are influenced by radiative transfer processes and the properties of the underlying stellar population. High equivalent widths of several hundred Å are especially hard to explain by models and could point tow…
Milky Way total mass derived by rotation curve and globular cluster kinematics from Gaia EDR3
Hammer, Francois; Wang, Jianling; Yang, Yanbin
Using action-based distribution function for the dynamical model of the Milky Way (MW) we have estimated its total mass and its density profile. Constraints are coming from the globular cluster proper motions from Gaia EDR3, from the rotation curve based on Gaia DR2 data, and from the vertical force data. We use Bayesian Markov chain Monte Carlo m…
A detailed analysis of the Gl 486 planetary system
Amado, P. J.; Caballero, J. A.; Pallé, E. +64 more
Context. The Gl 486 system consists of a very nearby, relatively bright, weakly active M3.5 V star at just 8 pc with a warm transiting rocky planet of about 1.3 R⊕ and 3.0 M⊕. It is ideal for both transmission and emission spectroscopy and for testing interior models of telluric planets.
Aims: To prepare for future studi…