Search Publications
MMS Examination of FTEs at the Earth's Subsolar Magnetopause
Russell, C. T.; Eastwood, J. P.; Nakamura, R. +9 more
Determining the magnetic field structure, electric currents, and plasma distributions within flux transfer event (FTE)-type flux ropes is critical to the understanding of their origin, evolution, and dynamics. Here the Magnetospheric Multiscale mission's high-resolution magnetic field and plasma measurements are used to identify FTEs in the vicini…
Constraints for the Progenitor Masses of Historic Core-collapse Supernovae
Dolphin, Andrew E.; Williams, Benjamin F.; Dalcanton, Julianne J. +3 more
We age-date the stellar populations associated with 12 historic nearby core-collapse supernovae (CCSNe) and two supernova impostors; from these ages, we infer their initial masses and associated uncertainties. To do this, we have obtained new Hubble Space Telescope imaging covering these CCSNe. Using these images, we measure resolved stellar photo…
Gaia-like astrometry and gravitational waves
Klioner, Sergei A.
This paper discusses the effects of gravitational waves on high-accuracy astrometric observations such as those delivered by Gaia. Depending on the frequency of gravitational waves, two regimes for the influence of gravitational waves on astrometric data are identified: the regime when the effects of gravitational waves directly influence the deri…
On Cepheid Distance Scale Bias Due to Stellar Companions and Cluster Populations
Riess, Adam G.; Anderson, Richard I.
State-of-the-art photometric measurements of extragalactic Cepheids account for the mean additional light due to chance superposition of Cepheids on crowded backgrounds through the use of artificial star measurements. However, light from stars physically associated with Cepheids may bias relative distance measurements if the changing spatial resol…
The Molecular Gas Content and Fuel Efficiency of Starbursts at z ∼ 1.6 with ALMA
Daddi, E.; Rodighiero, G.; Béthermin, M. +17 more
We present an analysis of the molecular gas properties, based on CO (2-1) emission, of 12 starburst galaxies at z ∼ 1.6 selected by having a boost (≳4×) in their star formation rate (SFR) above the average star-forming galaxy at an equivalent stellar mass. ALMA observations are acquired of six more galaxies than previously reported through our eff…
Bathymetry and composition of Titan's Ontario Lacus derived from Monte Carlo-based waveform inversion of Cassini RADAR altimetry data
Lorenz, R. D.; Lunine, J. I.; Hayes, A. G. +8 more
Recently, the Cassini RADAR was used to sound hydrocarbon lakes and seas on Saturn's moon Titan. Since the initial discovery of echoes from the seabed of Ligeia Mare, the second largest liquid body on Titan, a dedicated radar processing chain has been developed to retrieve liquid depth and microwave absorptivity information from RADAR altimetry of…
C-GOALS. II. Chandra observations of the lower luminosity sample of nearby luminous infrared galaxies in GOALS
Sanders, D. B.; Inami, H.; Armus, L. +14 more
We analyze Chandra X-ray observatory data for a sample of 63 luminous infrared galaxies (LIRGs), sampling the lower-infrared luminosity range of the Great Observatories All-Sky LIRG survey (GOALS), which includes the most luminous infrared selected galaxies in the local Universe. X-rays are detected for 84 individual galaxies within the 63 systems…
The very young resolved stellar populations around stripped-envelope supernovae
Maund, Justyn R.
The massive star origins for Type IIP supernovae (SNe) have been established through direct detection of their red supergiants progenitors in pre-explosion observations; however, there has been limited success in the detection of the progenitors of H-deficient SNe. The final fate of more massive stars, capable of undergoing a Wolf-Rayet phase, and…
New polarimetric and spectroscopic evidence of anomalous enrichment in spinel-bearing calcium-aluminium-rich inclusions among L-type asteroids
Surdej, J.; Tanga, P.; Carry, B. +14 more
Asteroids can be classified into several groups based on their spectral reflectance. Among these groups, the one belonging to the L-class in the taxonomic classification based on visible and near-infrared spectra exhibit several peculiar properties. First, their near-infrared spectrum is characterized by a strong absorption band interpreted as the…
ALMA Detection of Extended Millimeter Halos in the HD 32297 and HD 61005 Debris Disks
MacGregor, Meredith A.; Weinberger, Alycia J.; Hughes, A. Meredith +7 more
We present Atacama Large Millimeter/submillimeter Array (ALMA) 1.3 mm (230 GHz) observations of the HD 32297 and HD 61005 debris disks, two of the most iconic debris disks because of their dramatic swept-back wings seen in scattered light images. These observations achieve sensitivities of 14 and 13 µJy beam-1 for HD 32297 and HD …