Search Publications
Simulations of the WFIRST Supernova Survey and Forecasts of Cosmological Constraints
Kirshner, R. P.; Rest, A.; Filippenko, A. V. +14 more
The Wide Field InfraRed Survey Telescope (WFIRST) was the highest-ranked large space-based mission of the 2010 New Worlds, New Horizons decadal survey. It is now a NASA mission in formulation with a planned launch in the mid 2020s. A primary mission objective is to precisely constrain the nature of dark energy through multiple probes, including Ty…
Turbulence in the TW Hya Disk
Hughes, A. Meredith; Wilner, David J.; Andrews, Sean M. +3 more
Turbulence is a fundamental parameter in models of grain growth during the early stages of planet formation. As such, observational constraints on its magnitude are crucial. Here we self-consistently analyze ALMA CO(2-1), SMA CO(3-2), and SMA CO(6-5) observations of the disk around TW Hya and find an upper limit on the turbulent broadening of <…
The DEIMOS 10K Spectroscopic Survey Catalog of the COSMOS Field
Salvato, M.; Nayyeri, H.; Hasinger, G. +14 more
We present a catalog of 10,718 objects in the COSMOS field, observed through multi-slit spectroscopy with the Deep Imaging Multi-Object Spectrograph (DEIMOS) on the Keck II telescope in the wavelength range ∼5500-9800 Å. The catalog contains 6617 objects with high-quality spectra (two or more spectral features), and 1798 objects with a single spec…
Measurements of the Temperature and E-mode Polarization of the CMB from 500 Square Degrees of SPTpol Data
Ade, P. A. R.; Chiang, H. C.; Bleem, L. E. +64 more
We present measurements of the E-mode polarization angular auto-power spectrum (EE) and temperature-E-mode cross-power spectrum (TE) of the cosmic microwave background (CMB) using 150 GHz data from three seasons of SPTpol observations. We report the power spectra over the spherical harmonic multipole range 50< {\ell }≤slant 8000 and detect nine…
TESS Discovery of a Transiting Super-Earth in the pi Mensae System
Deming, Drake; Pál, András; Torres, Guillermo +63 more
We report the detection of a transiting planet around π Men (HD 39091), using data from the Transiting Exoplanet Survey Satellite (TESS). The solar-type host star is unusually bright (V = 5.7) and was already known to host a Jovian planet on a highly eccentric, 5.7 yr orbit. The newly discovered planet has a size of 2.04 ± 0.05 R ⊕ and …
A Population of Bona Fide Intermediate-mass Black Holes Identified as Low-luminosity Active Galactic Nuclei
Boutsia, Konstantina; Chilingarian, Igor V.; Zolotukhin, Ivan Yu. +4 more
Nearly every massive galaxy harbors a supermassive black hole (SMBH) in its nucleus. SMBH masses are millions to billions of solar mass, and they correlate with properties of spheroids of their host galaxies. While the SMBH growth channels, mergers, and gas accretion are well established, their origin remains uncertain: they could have emerged eit…
The Chemical Homogeneity of Sun-like Stars in the Solar Neighborhood
Dreizler, Stefan; Bedell, Megan; Casagrande, Luca +9 more
The compositions of stars are a critical diagnostic tool for many topics in astronomy such as the evolution of our Galaxy, the formation of planets, and the uniqueness of the Sun. Previous spectroscopic measurements indicate a large intrinsic variation in the elemental abundance patterns of stars with similar overall metal content. However, system…
CO and Dust Properties in the TW Hya Disk from High-resolution ALMA Observations
Hughes, A. Meredith; Wilner, David J.; Cleeves, L. Ilsedore +10 more
We analyze high angular resolution ALMA observations of the TW Hya disk to place constraints on the CO and dust properties. We present new, sensitive observations of the 12CO J = 3 - 2 line at a spatial resolution of 8 au (0.″14). The CO emission exhibits a bright inner core, a shoulder at r ≈ 70 au, and a prominent break in slope at r …
“Super-deblended” Dust Emission in Galaxies. II. Far-IR to (Sub)millimeter Photometry and High-redshift Galaxy Candidates in the Full COSMOS Field
Calabrò, Antonello; Dickinson, Mark; Daddi, Emanuele +17 more
We present a “super-deblended” far-infrared (FIR) to (sub)millimeter photometric catalog in the Cosmic Evolution Survey (COSMOS), prepared with the method recently developed by Liu et al., with key adaptations. We obtain point-spread function fitting photometry at fixed prior positions including 88,008 galaxies detected in VLA 1.4, 3 GHz, and/or M…
The Eccentric Cavity, Triple Rings, Two-armed Spirals, and Double Clumps of the MWC 758 Disk
Dong, Ruobing; Tamura, Motohide; Wisniewski, John +15 more
Spatially resolved structures in protoplanetary disks hint at unseen planets. Previous imaging observations of the transitional disk around MWC 758 revealed an inner cavity, a ring-like outer disk, emission clumps, and spiral arms, all possibly generated by companions. We present ALMA dust continuum observations of MWC 758 at 0.87 mm wavelength wi…