Search Publications
Discovery of a Low-redshift Damped Lyα System in a Foreground Extended Disk Using a Starburst Galaxy Background Illuminator
Heckman, Timothy M.; Alexandroff, Rachael M.; Jansen, Rolf A. +3 more
We present the discovery of a low-redshift damped Lyα (DLA) system in the spectrum of background starburst galaxy SDSS J111323.88+293039.3 (z = 0.17514). The DLA is at an impact parameter of ρ = 36 kpc from the star-forming galaxy, SDSS J111324.08+293051.2 (z = 0.17077). We measure an H column density of N(H ) = 3.47 × 1020 cm-2
Investigation of the Physical Origin of Overionized Recombining Plasma in the Supernova Remnant IC 443 with XMM-Newton
Seta, Masumichi; Uchida, Hiroyuki; Tsuru, Takeshi Go +4 more
The physical origin of the overionized recombining plasmas (RPs) in supernova remnants (SNRs) has been attracting attention because its understanding provides new insight into SNR evolution. However, the process of the overionization, although it has been discussed in some RP-SNRs, is not yet fully understood. Here, we report on spatially resolved…
Magnetic Connections across the Chromosphere-Corona Transition Region
Judge, Philip
The plasma contributing to emission from the Sun between the cool chromosphere (≤104 K) and hot corona (≥106 K) has been subjected to many different interpretations. Here we look at the magnetic structure of this transition region (TR) plasma, based upon the implications of CLASP2 data of an active region recently published b…
The Nature of the Eccentric Double-lined Eclipsing Binary System KIC 2306740 with Kepler Space Photometry
Southworth, J.; Koçak, D.; Yakut, K. +4 more
We present a detailed study of KIC 2306740, an eccentric double-lined eclipsing binary system. Kepler satellite data were combined with spectroscopic data obtained with the 4.2 m William Herschel Telescope (WHT). This allowed us to determine precise orbital and physical parameters of this relatively long period (P = 10.3°) and slightly eccentric (…
Detached Shell Carbon Stars: Tracing Thermal Pulses on the Asymptotic Giant Branch
Kastner, Joel H.; Wilson, Emily
We consider whether the subset of carbon-rich asymptotic giant branch (AGB) stars that exhibit detached, expanding circumstellar shells may reveal the past histories of these stars as having undergone helium shell flashes (thermal pulses) on the AGB. We exploit newly available Gaia parallaxes and photometry, along with archival infrared photometry…
Validation of HD 183579b Using Archival Radial Velocities: A Warm Neptune Orbiting a Bright Solar Analog
Kipping, David; Palatnick, Skyler; Yahalomi, Daniel
As exoplanetary science matures into its third decade, we are increasingly offered the possibility of pre-existing, archival observations for newly detected candidates. This is particularly poignant for the TESS mission, whose survey spans bright, nearby dwarf stars in both hemispheres—precisely the types of sources targeted by previous radial vel…
The Double-bubble Coronal Mass Ejection of the 2020 December 14 Total Solar Eclipse
Druckmüller, Miloslav; Boe, Benjamin; Habbal, Shadia +1 more
Total solar eclipses (TSEs) continue to provide an invaluable platform for exploring the magnetic topology of the solar corona and for studying dynamic events such as coronal mass ejections (CMEs)with a higher spatial resolution over a larger spatially continuous extent than is possible to achieve with any other method at present. In this Letter, …
The JCMT BISTRO-2 Survey: The Magnetic Field in the Center of the Rosette Molecular Cloud
Pattle, Kate; Karoly, Janik; Ward-Thompson, Derek +33 more
We present the first 850 µm polarization observations in the most active star-forming site of the Rosette Molecular Cloud (d ∼ 1.6 kpc) in the wall of the Rosette Nebula, imaged with the SCUBA-2/POL-2 instruments of the James Clerk Maxwell telescope, as part of the B-Fields In Star-forming Region Observations 2 (BISTRO-2) survey. From the PO…
Constraining Progenitors of Observed Low-mass X-ray Binaries Using Convection and Rotation-Boosted Magnetic Braking
Van, Kenny X.; Ivanova, Natalia
We present a new method for constraining the mass transfer evolution of low-mass X-ray binaries (LMXBs)-a reverse population synthesis technique. This is done using the detailed 1D stellar evolution code MESA (Modules for Experiments in Stellar Astrophysics) to evolve a high-resolution grid of binary systems spanning a comprehensive range of initi…
Elemental Abundances of the Hot Atmosphere of Luminous Infrared Galaxy Arp 299
Fukazawa, Yasushi; Gu, Liyi; Zhou, Ping +8 more
Hot atmospheres of massive galaxies are enriched with metals. Elemental abundances measured in the X-ray band have been used to study the chemical enrichment of supernova remnants, elliptical galaxies, groups, and clusters of galaxies. Here we measure the elemental abundances of the hot atmosphere of luminous infrared galaxy Arp 299 observed with …