Search Publications
Missions
Journals
Publication Years
Steady-state nucleosynthesis throughout the Galaxy
Wang, Wei; Martin, Pierrick; Diehl, Roland +6 more
The measurement and astrophysical interpretation of characteristic γ-ray lines from nucleosynthesis was one of the prominent science goals of the INTEGRAL mission and in particular its spectrometer SPI. Emission from 26Al and from 60Fe decay lines, due to their My decay times, originates from accumulated ejecta of nucleosynth…
The Dayside Ionopause of Mars: Solar Wind Interaction, Pressure Balance, and Comparisons With Venus
Gurnett, D. A.; Kopf, A. J.; Halekas, J. +5 more
Due to the lower ionospheric thermal pressure and existence of the crustal magnetism at Mars, the Martian ionopause is expected to behave differently from the ionopause at Venus. We study the solar wind interaction and pressure balance at the ionopause of Mars using both in situ and remote sounding measurements from the Mars Advanced Radar for Sub…
The Swan: Data-driven Inference of Stellar Surface Gravities for Cool Stars from Photometric Light Curves
Huber, Daniel; Ness, Melissa K.; Wheeler, Adam +1 more
Stellar light curves are well known to encode physical stellar properties. Precise, automated, and computationally inexpensive methods to derive physical parameters from light curves are needed to cope with the large influx of these data from space-based missions such as Kepler and TESS. Here we present a new methodology that we call "The Swan," a…
A synergy of the velocity gradients technique and the probability density functions for identifying gravitational collapse in self-absorbing media
Lazarian, A.; Hu, Yue
The velocity gradients technique (VGT) and the probability density functions (PDFs) of mass density are tools to study turbulence, magnetic fields, and self-gravity in molecular clouds. However, self-absorption can significantly make the observed intensity different from the column density structures. In this work, we study the effects of self-abs…
A 99 minute Double-lined White Dwarf Binary from SDSS-V
Maoz, Dan; Hermes, J. J.; Rix, Hans-Walter +12 more
We report the discovery of SDSS J133725.26+395237.7 (hereafter SDSS J1337+3952), a double-lined white dwarf (WD+WD) binary identified in early data from the fifth-generation Sloan Digital Sky Survey (SDSS-V). The double-lined nature of the system enables us to fully determine its orbital and stellar parameters with follow-up Gemini spectroscopy an…
Radius and Mass Distribution of Ultra-short-period Planets
Uzsoy, Ana Sofía M.; Rogers, Leslie A.; Price, Ellen M.
Ultra-short-period (USP) planets are an enigmatic subset of exoplanets defined by having orbital periods <1 day. It is still not understood how USP planets form, or to what degree they differ from planets with longer orbital periods. Most USP planets have radii <2 R⊕, while planets that orbit further from their star extend to Jupi…
Radio Counterpart Candidates to Unassociated 4FGL-DR2 Sources
Schinzel, F. K.; Bruzewski, S.; Taylor, G. B. +1 more
For the duration of the Fermi Gamma-Ray Space Telescope's mission, approximately one-third of the point sources detected have been noted as "unassociated," meaning that they seem to have no known counterpart at any other wavelength/frequency. This mysterious part of the gamma-ray sky is perhaps one of the largest unknowns in current astronomical p…
A transmission spectrum of the planet candidate WD 1856+534 b and a lower limit to its mass
Alonso, R.; Hollands, M. A.; Castro-Rodríguez, N. +7 more
The cool white dwarf WD 1856+534 was found to be transited by a Jupiter-sized object with a mass at or below 14 MJup. We used the GTC telescope to obtain and analyse the photometry and low-resolution spectroscopy of six transits of WD 1856+534 b, with the intention of deriving the slope of the transmission spectrum. Such a slope, assumi…
Solar wind rotation rate and shear at coronal hole boundaries. Possible consequences for magnetic field inversions
Lavraud, B.; Fargette, N.; Rouillard, A. P. +6 more
Context. In situ measurements by several spacecraft have revealed that the solar wind is frequently perturbed by transient structures that have been interpreted as magnetic folds, jets, waves, and flux ropes that propagate rapidly away from the Sun over a large range of heliocentric distances. Parker Solar Probe (PSP), in particular, has detected …
One Source, Two Source(s): Ribs and Tethers
Knowles, Kenda; Rudnick, Lawrence; Kolokythas, Konstantinos +1 more
We present the unique and challenging case of a radio galaxy in Abell 3266 observed as part of the MeerKAT Galaxy Cluster Legacy Survey. It has quasi-periodic bright patches along the tail which connect to never-before-seen thin transverse extensions, which we call "ribs", reaching up to ∼50 kpc from the central axis of the tail. At a distance of …