Search Publications
Searching for Islands of Reionization: A Potential Ionized Bubble Powered by a Spectroscopic Overdensity at z = 8.7
Papovich, Casey; Finkelstein, Steven L.; Dickinson, Mark +10 more
We present the results from a spectroscopic survey using the MOSFIRE near-infrared spectrograph on the 10 m Keck telescope to search for Lyα emission from candidate galaxies at z ~ 9-10 in four of the CANDELS fields (GOODS-N, EGS, UDS, and COSMOS). We observed 11 target galaxies, detecting Lyα from one object in ~8.1 hr of integration, at z = 8.66…
The diverse cold molecular gas contents, morphologies, and kinematics of type-2 quasars as seen by ALMA
Tadhunter, C. N.; Feruglio, C.; García-Burillo, S. +8 more
We present CO(2−1) and adjacent continuum observations of seven nearby radio-quiet type-2 quasars (QSO2s) obtained with ALMA at ∼0.2″ resolution (370 pc at z ∼ 0.1). These QSO2s are luminous (L[OIII] > 108.5 L⊙ ∼ MB < −23), and their host galaxies massive (M* ∼ 1011 M⊙
Hunting for massive black holes in dwarf galaxies
Reines, Amy E.
Despite traditional thinking, an appreciable population of massive black holes (that is, more massive than stellar-mass black holes) may be lurking in dwarf galaxies. Before the last decade, nearly all known massive black holes were in the nuclei of giant galaxies and the existence of massive black holes in dwarf galaxies was highly controversial.…
Significant Dust-obscured Star Formation in Luminous Lyman-break Galaxies at z 7-8
Holwerda, Benne W.; Carniani, Stefano; Maiolino, Roberto +13 more
We make use of Atacama Large Millimeter/submillimeter Array continuum observations of 15 luminous Lyman-break galaxies at z ~ 7-8 to probe their dust-obscured star formation. These observations are sensitive enough to probe obscured star formation rates (SFRs) of 20 M ⊙ yr-1 (3σ). Six of the targeted galaxies show significant…
The star formation burstiness and ionizing efficiency of low-mass galaxies
Contini, Thierry; van Dokkum, Pieter; Reddy, Naveen +5 more
We investigate the burstiness of star formation and the ionizing efficiency of a large sample of galaxies at 0.7 < z < 1.5 using HST grism spectroscopy and deep ultraviolet (UV) imaging in the GOODS-N and GOODS-S fields. The star formation history (SFH) in these strong emission-line low-mass galaxies indicates an elevated star formation rate…
Dark Energy Survey Year 3 results: galaxy clustering and systematics treatment for lens galaxy samples
Bacon, D.; Bechtol, K.; Smith, M. +103 more
In this work, we present the galaxy clustering measurements of the two DES lens galaxy samples: a magnitude-limited sample optimized for the measurement of cosmological parameters, MAGLIM, and a sample of luminous red galaxies selected with the REDMAGIC algorithm. MAGLIM/REDMAGIC sample contains over 10 million/2.5 million galaxies and is divided …
TESS Hunt for Young and Maturing Exoplanets (THYME). VI. An 11 Myr Giant Planet Transiting a Very-low-mass Star in Lower Centaurus Crux
Owen, James E.; Vanderburg, Andrew; Lester, Kathryn V. +48 more
Mature super-Earths and sub-Neptunes are predicted to be ≃ Jovian radius when younger than 10 Myr. Thus, we expect to find 5-15 R ⊕ planets around young stars even if their older counterparts harbor none. We report the discovery and validation of TOI 1227b, a 0.85 ± 0.05 R J (9.5 R ⊕) planet transiting a very-low-m…
Reconstructing the Disrupted Dwarf Galaxy Gaia-Sausage/Enceladus Using Its Stars and Globular Clusters
Limberg, Guilherme; Rossi, Silvia; Perottoni, Hélio D. +3 more
We combine spectroscopic, photometric, and astrometric information from APOGEE data release 17 and Gaia early data release 3 to perform a self-consistent characterization of Gaia-Sausage/Enceladus (GSE), the remnant of the last major merger experienced by the Milky Way, considering stars and globular clusters (GCs) altogether. Our novel set of che…
The Sparkler: Evolved High-redshift Globular Cluster Candidates Captured by JWST
Ravindranath, Swara; Willott, Chris J.; Martis, Nicholas S. +16 more
Using data from JWST, we analyse the compact sources ("sparkles") located around a remarkable z spec = 1.378 galaxy (the 'Sparkler) that is strongly gravitationally lensed by the z = 0.39 galaxy cluster SMACS J0723.3-7327. Several of these compact sources can be cross-identified in multiple images, making it clear that they are associat…
The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. XXIII. Proper-motion Catalogs and Internal Kinematics
Milone, Antonino P.; Vesperini, Enrico; Anderson, Jay +17 more
A number of studies based on the data collected by the Hubble Space Telescope (HST) GO-13297 program "HST Legacy Survey of Galactic Globular Clusters: Shedding UV Light on Their Populations and Formation" have investigated the photometric properties of a large sample of Galactic globular clusters and revolutionized our understanding of their stell…