Search Publications
The Evolution of the Star-Forming Interstellar Medium Across Cosmic Time
Sternberg, Amiel; Genzel, Reinhard; Tacconi, Linda J.
Over the past decade, increasingly robust estimates of the dense molecular gas content in galaxy populations between redshift z = 0 and the peak of cosmic galaxy/star formation (z ∼ 1-3) have become available. This rapid progress has been possible due to the advent of powerful ground- and space-based telescopes for the combined study of several mi…
Cool outflows in galaxies and their implications
Maiolino, Roberto; Bolatto, Alberto D.; Veilleux, Sylvain +1 more
Neutral-atomic and molecular outflows are a common occurrence in galaxies, near and far. They operate over the full extent of their galaxy hosts, from the innermost regions of galactic nuclei to the outermost reaches of galaxy halos. They carry a substantial amount of material that would otherwise have been used to form new stars. These cool outfl…
A repeating fast radio burst source localized to a nearby spiral galaxy
Lazio, T. J. W.; Kirichenko, A. Yu.; Vanderlinde, K. +51 more
Fast radio bursts (FRBs) are brief, bright, extragalactic radio flashes1,2. Their physical origin remains unknown, but dozens of possible models have been postulated3. Some FRB sources exhibit repeat bursts4-7. Although over a hundred FRB sources have been discovered8, only four have been localized and a…
Calibration of the Tip of the Red Giant Branch
Madore, Barry F.; Freedman, Wendy L.; Lee, Myung Gyoon +6 more
The tip of the red giant branch (TRGB) method provides one of the most accurate and precise means of measuring the distances to nearby galaxies. Here we present a multi-wavelength, VIJHK absolute calibration of the TRGB based on observations of TRGB stars in the Large Magellanic Cloud (LMC), grounded on a geometric distance, determined by detached…
TDCOSMO. IV. Hierarchical time-delay cosmography - joint inference of the Hubble constant and galaxy density profiles
Treu, T.; Christensen, L.; Koopmans, L. V. E. +24 more
The H0LiCOW collaboration inferred via strong gravitational lensing time delays a Hubble constant value of H0 = 73.3-1.8+1.7 km s-1 Mpc-1, describing deflector mass density profiles by either a power-law or stars (constant mass-to-light ratio) plus standard dark matter halos. The mass-sheet tr…
Evidence from the H3 Survey That the Stellar Halo Is Entirely Comprised of Substructure
Conroy, Charlie; Ting, Yuan-Sen; Cargile, Phillip A. +5 more
In the ΛCDM paradigm, the Galactic stellar halo is predicted to harbor the accreted debris of smaller systems. To identify these systems, the H3 Spectroscopic Survey, combined with Gaia, is gathering 6D phase-space and chemical information in the distant Galaxy. Here we present a comprehensive inventory of structure within 50 kpc from the Galactic…
Streams, Substructures, and the Early History of the Milky Way
Helmi, Amina
The advent of the second data release of the Gaia mission, in combination with data from large spectroscopic surveys, is revolutionizing our understanding of the Galaxy. Thanks to these transformational data sets and the knowledge accumulated thus far, a new, more mature picture of the evolution of the early Milky Way is currently emerging. Two of…
The SunPy Project: Open Source Development and Status of the Version 1.0 Core Package
Ryan, Daniel F.; Murray, Sophie A.; Ireland, Jack +32 more
The goal of the SunPy project is to facilitate and promote the use and development of community-led, free, and open source data analysis software for solar physics based on the scientific Python environment. The project achieves this goal by developing and maintaining the sunpy core package and supporting an ecosystem of affiliated packages. This …
INTEGRAL Discovery of a Burst with Associated Radio Emission from the Magnetar SGR 1935+2154
Tiengo, A.; Sunyaev, R.; Götz, D. +23 more
We report on International Gamma-Ray Astrophysics Laboratory (INTEGRAL) observations of the soft γ-ray repeater SGR 1935+2154 performed between 2020 April 28 and May 3. Several short bursts with fluence of $\sim {10}^{-7}\mbox{--}{10}^{-6}$ erg cm-2 were detected by the Imager on-board INTEGRAL (IBIS) instrument in the 20-200 keV range.…
Pan-STARRS Photometric and Astrometric Calibration
Price, P. A.; Chambers, K. C.; Stubbs, C. W. +20 more
We present the details of the photometric and astrometric calibration of the Pan-STARRS1 3π Survey. The photometric goals were to reduce the systematic effects introduced by the camera and detectors, and to place all of the observations onto a photometric system with consistent zero-points over the entire area surveyed, the ≈30,000 deg2…