Search Publications
How Magnetic Reconnection May Affect the Coherence of Interplanetary Coronal Mass Ejections
Farrugia, C. J.; Galvin, A. B.; Davies, E. E. +12 more
On 2020 April 19-20, a solar ejection was seen by spacecraft in a radial alignment that included Solar Orbiter and Wind. The ejection contained a magnetic flux rope where magnetic field and plasma parameters were well correlated between spacecraft. This structure is called an "unperturbed magnetic flux rope" (UMFR). Ahead of the UMFR is a portion …
Internal Calibration of LAMOST and Gaia DR3 GSP-Spec Stellar Abundances
Niu, Zexi; Liu, Jifeng; Yuan, Haibo
Stellar chemical abundances are crucial and fundamental in astrophysics. However, they could suffer from substantial systematic errors according to several investigations but still lack calibrations in bulk. By using Gaia wide binaries, we find the temperature-dependent bias between the two binary components for [Fe/H] and [α/Fe] measurements from…
The Binary and the Disk: The Beauty is Found within NGC3132 with JWST
Sahai, Raghvendra; Bujarrabal, Valentin; Quintana-Lacaci, Guillermo +4 more
The planetary nebula (PN) NGC 3132 is a striking example of the dramatic but poorly understood mass-loss phenomena that (1-8) M ⊙ stars undergo during their death throes as they evolve into white dwarfs (WDs). From an analysis of JWST multiwavelength (0.9-18 µm) imaging of NGC 3132, we report the discovery of an extended dust clou…
The Direction of the Flow of Interstellar Neutral H Based on Photometric Observations from SOHO/SWAN
Bzowski, M.; Quémerais, E.; Kubiak, M. A. +3 more
Interstellar neutral hydrogen flows into the heliosphere as a mixture of the primary and secondary populations from two somewhat different directions due to splitting occurring in the magnetized outer heliosheath. The direction of the inflow of interstellar neutral H observed in the inner heliosphere, confronted with that of the unperturbed flow o…
ALMA Lensing Cluster Survey: Properties of Millimeter Galaxies Hosting X-Ray-detected Active Galactic Nuclei
Fujimoto, Seiji; Kohno, Kotaro; Sun, Fengwu +10 more
We report the multiwavelength properties of millimeter galaxies hosting X-ray detected active galactic nuclei (AGNs) from the ALMA Lensing Cluster Survey (ALCS). ALCS is an extensive survey of well-studied lensing clusters with ALMA, covering an area of 133 arcmin2 over 33 clusters with a 1.2 mm flux-density limit of ~60 µJy (1σ).…
NuSTAR Observations of a Heavily X-Ray-obscured AGN in the Dwarf Galaxy J144013+024744
Trump, Jonathan R.; Brandt, W. N.; Swartz, Douglas A. +10 more
We present a multiwavelength analysis of the dwarf Seyfert 2 galaxy J144013+024744, a candidate obscured active galactic nucleus (AGN) thought to be powered by an intermediate-mass black hole (IMBH, M • ≈ 104-106 M ⊙) of mass M • ~ 105.2 M ⊙. To study its X-ray properties…
Modulation of Cosmic-Ray Antiprotons in the Heliosphere: Simulations for a Solar Cycle
Luo, Xi; Potgieter, M. S.; Aslam, O. P. M. +1 more
The precision measurements of galactic cosmic-ray protons from the Payload for Antimatter Matter Exploration and Light-nuclei Astrophysics and the Alpha Magnetic Spectrometer are reproduced using a well-established three-dimensional numerical model for the period 2006 July-2019 November. The resulting modulation parameters are applied to simulate …
Understanding the Duration of Solar and Stellar Flares at Various Wavelengths
Reep, Jeffrey W.; Airapetian, Vladimir S.
Recent irradiance measurements from numerous heliophysics and astrophysics missions including Solar Dynamics Observatory (SDO), GOES, Kepler, TESS, Chandra, the X-ray Multi-Mirror Mission, and NICER have provided critical input into understanding the physics of the most powerful transient events on the Sun and magnetically active stars:solar and s…
A Young White Dwarf Orbiting PSR J1835-3259B in the Bulge Globular Cluster NGC 6652
Cadelano, Mario; Pallanca, Cristina; Ferraro, Francesco R. +8 more
We report on the discovery of the companion star to the millisecond pulsar PSR J1835-3259B in the Galactic globular cluster NGC 6652. Taking advantage of deep photometric archival observations acquired through the Hubble Space Telescope in near-UV and optical bands, we identified a bright and blue object at a position compatible with that of the r…
Modeling the Formation and Evolution of Solar Wind Microstreams: From Coronal Plumes to Propagating Alfvénic Velocity Spikes
Rouillard, Alexis P.; Réville, Victor; Gannouni, Bahaeddine
We investigate the origin of mesoscale structures in the solar wind called microstreams, defined as enhancements in the solar wind speed and temperature that last several hours. They were first clearly detected in Helios and Ulysses solar wind data and are now omnipresent in the "young" solar wind measured by the Parker Solar Probe and Solar Orbit…