Search Publications
The Old Host-galaxy Environment of SSS17a, the First Electromagnetic Counterpart to a Gravitational-wave Source
Rest, A.; Foley, R. J.; Boutsia, K. +16 more
We present an analysis of the host-galaxy environment of Swope Supernova Survey 2017a (SSS17a), the discovery of an electromagnetic counterpart to a gravitational-wave source, GW170817. SSS17a occurred 1.9 kpc (in projection; 10.″2) from the nucleus of NGC 4993, an S0 galaxy at a distance of 40 Mpc. We present a Hubble Space Telescope (HST) pre-tr…
Deep CO(1-0) Observations of z = 1.62 Cluster Galaxies with Substantial Molecular Gas Reservoirs and Normal Star Formation Efficiencies
Papovich, Casey; Momcheva, Ivelina; Saintonge, Amelie +9 more
We present an extremely deep CO(1-0) observation of a confirmed z = 1.62 galaxy cluster. We detect two spectroscopically confirmed cluster members in CO(1-0) with signal-to-noise ratio > 5. Both galaxies have log({{ M }}\star /{{ M }}⊙ ) > 11 and are gas rich, with {{ M }}{mol}/({{ M }}\star +{{ M …
The Rest-frame Optical (900 nm) Galaxy Luminosity Function at z ∼ 4-7: Abundance Matching Points to Limited Evolution in the M STAR/M HALO Ratio at z ≥ 4
Muzzin, Adam; Labbé, Ivo; Bouwens, Rychard J. +4 more
We present the first determination of the galaxy luminosity function (LF) at z ∼ 4, 5, 6, and 7, in the rest-frame optical at {λ }{rest}∼ 900 {nm} (z‧ band). The rest-frame optical light traces the content in low-mass evolved stars (∼stellar mass—M *), minimizing potential measurement biases for M *. Moreover, it i…
No Overdensity of Lyman-Alpha Emitting Galaxies around a Quasar at z ∼ 5.7
Walter, F.; Decarli, R.; Overzier, R. +4 more
Bright quasars, observed when the universe was less than one billion years old (z > 5.5), are known to host massive black holes (∼109 M⊙) and are thought to reside in the center of massive dark matter overdensities. In this picture, overdensities of galaxies are expected around high-redshift quasars. However, observations …
Ultra-diffuse and Ultra-compact Galaxies in the Frontier Fields Cluster Abell 2744
van Dokkum, Pieter; Romanowsky, Aaron J.; Abraham, Roberto +3 more
We report the discovery of a large population of ultra-diffuse galaxies (UDGs) in the massive galaxy cluster Abell 2744 (z = 0.308) as observed by the Hubble Frontier Fields program. Since this cluster is ∼5 times more massive than Coma, our observations allow us to extend 0.7 dex beyond the high-mass end of the relationship between UDG abundance …
Globular Cluster Systems in Brightest Cluster Galaxies. III: Beyond Bimodality
Bailin, Jeremy; Rothberg, Barry; Harris, William E. +4 more
We present new deep photometry of the rich globular cluster (GC) systems around the Brightest Cluster Galaxies UGC 9799 (Abell 2052) and UGC 10143 (Abell 2147), obtained with the Hubble Space Telescope (HST) ACS and WFC3 cameras. For comparison, we also present new reductions of similar HST/ACS data for the Coma supergiants NGC 4874 and 4889. All …
The Grism Lens-amplified Survey from Space (GLASS). X. Sub-kiloparsec Resolution Gas-phase Metallicity Maps at Cosmic Noon behind the Hubble Frontier Fields Cluster MACS1149.6+2223
Fontana, Adriano; Schmidt, Kasper B.; Treu, Tommaso +17 more
We combine deep Hubble Space Telescope grism spectroscopy with a new Bayesian method to derive maps of gas-phase metallicity for 10 star-forming galaxies at high redshift (1.2≲ z≲ 2.3). Exploiting lensing magnification by the foreground cluster MACS1149.6+2223, we reach sub-kiloparsec spatial resolution and push the limit of stellar mass associate…
A Massive Shell of Supernova-formed Dust in SNR G54.1+0.3
Gelfand, Joseph D.; Temim, Tea; Reynolds, Stephen P. +5 more
While theoretical models of dust condensation predict that most refractory elements produced in core-collapse supernovae (SNe) efficiently condense into dust, a large quantity of dust has so far only been observed in SN 1987A. We present an analysis of observations from the Spitzer Space Telescope, Herschel Space Observatory, Stratospheric Observa…
Dust-trapping Vortices and a Potentially Planet-triggered Spiral Wake in the Pre-transitional Disk of V1247 Orionis
Monnier, John D.; Kraus, Stefan; Wisniewski, John +9 more
The radial drift problem constitutes one of the most fundamental problems in planet formation theory, as it predicts particles to drift into the star before they are able to grow to planetesimal size. Dust-trapping vortices have been proposed as a possible solution to this problem, as they might be able to trap particles over millions of years, al…
X-Rays from the Location of the Double-humped Transient ASASSN-15lh
Sbarufatti, B.; Berger, E.; Dall'Osso, S. +13 more
We present the detection of persistent soft X-ray radiation with {L}x∼ {10}41-1042 erg s-1 at the location of the extremely luminous, double-humped transient ASASSN-15lh as revealed by Chandra and Swift. We interpret this finding in the context of observations from our multiwavelength campaign, which rev…