Search Publications
High Lyman Continuum Escape Fraction in a Lensed Young Compact Dwarf Galaxy at z = 2.5
Fan, Xiaohui; Jiang, Linhua; Cai, Zheng +2 more
We present the HST WFC3/F275W UV imaging observations of A2218-Flanking, a lensed compact dwarf galaxy at redshift z≈ 2.5. The stellar mass of A2218-Flanking is {log}({M}* /{M}⊙ )={9.14}-0.04+0.07 and SFR is {12.5}-7.4+3.8 {M}⊙ yr-1 after correcting the magnif…
The Origins of [C II] Emission in Local Star-forming Galaxies
Boquien, M.; Rigopoulou, D.; Armus, L. +17 more
The [C II] 158 µm fine-structure line is the brightest emission line observed in local star-forming galaxies. As a major coolant of the gas-phase interstellar medium, [C II] balances the heating, including that due to far-ultraviolet photons, which heat the gas via the photoelectric effect. However, the origin of [C II] emission remains uncl…
The Complete Infrared View of Active Galactic Nuclei from the 70 Month Swift/BAT Catalog
Ueda, Yoshihiro; Kawamuro, Taiki; Ricci, Claudio +5 more
We systematically investigate the near- to far-infrared (FIR) photometric properties of a nearly complete sample of local active galactic nuclei (AGNs) detected in the Swift/Burst Alert Telescope (BAT) all-sky ultra-hard X-ray (14-195 keV) survey. Out of 606 non-blazar AGNs in the Swift/BAT 70 month catalog at high galactic latitudes of | b| > …
The Evolution of the Tully-Fisher Relation between z ∼ 2.3 and z ∼ 0.9 with KMOS3D
Lutz, D.; Wuyts, S.; Förster Schreiber, N. M. +24 more
We investigate the stellar mass and baryonic mass Tully-Fisher relations (TFRs) of massive star-forming disk galaxies at redshift z∼ 2.3 and z∼ 0.9 as part of the {{KMOS}}3{{D}} integral field spectroscopy survey. Our spatially resolved data allow reliable modeling of individual galaxies, including the effect of pressure support on the …
Constraints on Axion-like Particles from X-Ray Observations of NGC1275
Berg, Marcus; Conlon, Joseph P.; Day, Francesca +4 more
Axion-like particles (ALPs) can induce localized oscillatory modulations in the spectra of photon sources passing through astrophysical magnetic fields. Ultra-deep Chandra observations of the Perseus cluster contain over 5× {10}5 counts from the active galactic nucleus (AGN) of the central cluster galaxy NGC1275 and represent a data set…
The Tip of the Red Giant Branch Distances to Type Ia Supernova Host Galaxies. IV. Color Dependence and Zero-point Calibration
Lee, Myung Gyoon; Jang, In Sung
We present a revised Tip of the Red Giant Branch (TRGB) calibration, accurate to 2.7% of distance. A modified TRGB magnitude corrected for its color dependence, the QT magnitude, is introduced for better measurement of the TRGB. We determine the color-magnitude relation of the TRGB from photometry of deep images of HST/ACS fields around eight near…
Alma Observations of Massive Molecular Gas Filaments Encasing Radio Bubbles in the Phoenix Cluster
Bayliss, M. B.; Fabian, A. C.; Hlavacek-Larrondo, J. +11 more
We report new ALMA observations of the CO(3-2) line emission from the 2.1+/- 0.3× {10}10 {M}⊙ molecular gas reservoir in the central galaxy of the Phoenix cluster. The cold molecular gas is fueling a vigorous starburst at a rate of 500{--}800 {M}⊙ {{yr}}-1 and powerful black hole activity in the forms …
The MOSDEF Survey: AGN Multi-wavelength Identification, Selection Biases, and Host Galaxy Properties
Siana, Brian; Azadi, Mojegan; Aird, James +10 more
We present results from the MOSFIRE Deep Evolution Field (MOSDEF) survey on the identification, selection biases, and host galaxy properties of 55 X-ray, IR, and optically selected active galactic nuclei (AGNs) at 1.4< z< 3.8. We obtain rest-frame optical spectra of galaxies and AGNs and use the BPT diagram to identify optical AGNs. We exami…
SPIRITS: Uncovering Unusual Infrared Transients with Spitzer
Van Dyk, Schuyler D.; Tinyanont, Samaporn; Smith, Nathan +44 more
We present an ongoing, five-year systematic search for extragalactic infrared transients, dubbed SPIRITS—SPitzer InfraRed Intensive Transients Survey. In the first year, using Spitzer/IRAC, we searched 190 nearby galaxies with cadence baselines of one month and six months. We discovered over 1958 variables and 43 transients. Here, we describe the …
Living on a Flare: Relativistic Reflection in V404 Cyg Observed by NuSTAR during Its Summer 2015 Outburst
Harrison, F. A.; Stern, D.; Fabian, A. C. +19 more
We present first results from a series of NuSTAR observations of the black hole X-ray binary V404 Cyg obtained during its summer 2015 outburst, primarily focusing on observations during the height of this outburst activity. The NuSTAR data show extreme variability in both the flux and spectral properties of the source. This is partly driven by str…