Search Publications
A First Look at Spatially Resolved Balmer Decrements at 1.0 < z < 2.4 from JWST NIRISS Slitless Spectroscopy
Willott, Chris J.; Bradač, Maruša; Asada, Yoshihisa +14 more
We present the first results on the spatial distribution of dust attenuation at 1.0 < z < 2.4 traced by the Balmer decrement, Hα/Hβ, in emission-line galaxies using deep JWST NIRISS slitless spectroscopy from the CAnadian NIRISS Unbiased Cluster Survey (CANUCS). Hα and Hβ emission-line maps of emission-line galaxies are extracted and stacked…
GOALS-JWST: Pulling Back the Curtain on the AGN and Star Formation in VV 114
Malkan, M. A.; Inami, H.; Murphy, E. J. +33 more
We present results from the James Webb Space Telescope Director's Discretionary Time Early Release Science program 1328 targeting the nearby, luminous infrared galaxy, VV 114. We use the MIRI and NIRSpec instruments to obtain integral-field spectroscopy of the heavily obscured eastern nucleus (V114E) and surrounding regions. The spatially resolved…
REQUIEM-2D: A Diversity of Formation Pathways in a Sample of Spatially Resolved Massive Quiescent Galaxies at z 2
Mahler, Guillaume; Richard, Johan; Bezanson, Rachel +16 more
REQUIEM-2D (Resolving Quiescent Magnified Galaxies with 2D Grism Spectroscopy) comprises a sample of eight massive ( ${\rm{log}}({M}_{\ast }/{M}_{\odot })\gt 10.6$ ) strongly lensed quiescent galaxies at z ~ 2. REQUIEM-2D combines the natural magnification from strong gravitational lensing with the high-spatial-resolution grism spectroscopy of the…
XUE: Molecular Inventory in the Inner Region of an Extremely Irradiated Protoplanetary Disk
Henning, Thomas; Bik, Arjan; Tabone, Benoît +24 more
We present the first results of the eXtreme UV Environments (XUE) James Webb Space Telescope (JWST) program, which focuses on the characterization of planet-forming disks in massive star-forming regions. These regions are likely representative of the environment in which most planetary systems formed. Understanding the impact of environment on pla…
CLASSY. VI. The Density, Structure, and Size of Absorption-line Outflows in Starburst Galaxies
Martin, Crystal L.; Scarlata, Claudia; Henry, Alaina +12 more
Galaxy formation and evolution are regulated by the feedback from galactic winds. Absorption lines provide the most widely available probe of winds. However, since most data only provide information integrated along the line of sight, they do not directly constrain the radial structure of the outflows. In this paper, we present a method to directl…
Detection of the Low-stellar-mass Host Galaxy of a z 6.25 Quasar with JWST
Lyu, Jianwei; Rieke, George H.; Alberts, Stacey +1 more
We characterize the stellar mass of J2239+0207, a z ~ 6.25 sub-Eddington quasar (M 1450 = -24.6), using dedicated JWST/NIRCam medium-band observations of a nearby point-spread function star to remove the central point source and reveal the underlying galaxy emission. We detect the host galaxy in two bands longward of the Balmer break, o…
JWST NIRSpec Observations of Supernova 1987A-From the Inner Ejecta to the Reverse Shock
Fox, O. D.; Blommaert, J. A. D. L.; Larsson, J. +23 more
We present initial results from JWST NIRSpec integral field unit observations of the nearby supernova SN 1987A. The observations provide the first spatially resolved spectroscopy of the ejecta and equatorial ring (ER) over the 1-5 µm range. We construct 3D emissivity maps of the [Fe I] 1.443 µm line from the inner ejecta and the He I 1…
The Next Generation Virgo Cluster Survey (NGVS). XXXV. First Kinematical Clues of Overly Massive Dark Matter Halos in Several Ultradiffuse Galaxies in the Virgo Cluster
Côté, Patrick; Peng, Eric W.; Ferrarese, Laura +8 more
We present Keck/DEIMOS spectroscopy of the first complete sample of ultradiffuse galaxies (UDGs) in the Virgo cluster. We select all UDGs in Virgo that contain at least 10 globular cluster (GC) candidates and are more than 2.5σ outliers in scaling relations of size, surface brightness, and luminosity (a total of 10 UDGs). We use the radial velocit…
The Cool Circumgalactic Medium of Low-redshift Star-forming Galaxies. I. Empirical Model and Mean Properties
Werk, Jessica K.; Faerman, Yakov
We present an analytic model for the cool, T ~ 104 K, circumgalactic medium (CGM), describing the gas distribution, and thermal and ionization states. Our model assumes (total) pressure equilibrium with the ambient warm/hot CGM, photoionization by the metagalactic radiation, and allows for nonthermal pressure support, parameterized by t…
Ultracool Dwarfs Observed with the Spitzer Infrared Spectrograph: Equatorial Latitudes in L Dwarf Atmospheres Are Cloudier
Metchev, Stanimir; Faherty, Jacqueline K.; Vos, Johanna M. +2 more
We report direct observational evidence for a latitudinal dependence of dust cloud opacity in ultracool dwarfs, indicating that equatorial latitudes are cloudier than polar latitudes. These results are based on a strong positive correlation between the viewing geometry and the mid-infrared silicate absorption strength in mid-L dwarfs using mid-inf…