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The black widow pulsar J1641+8049 in the optical, radio, and X-rays
Geier, S.; Zharikov, S. V.; Karpova, A. V. +14 more
PSR J1641+8049 is a 2 ms black widow pulsar with the 2.2 h orbital period detected in the radio and γ-rays. We performed new phase-resolved multiband photometry of PSR J1641+8049 using the OSIRIS instrument at the Gran Telescopio Canarias. The obtained data were analysed together with the new radio-timing observations from the Canadian Hydrogen In…
High-resolution X-ray spectra of the compact binary supersoft X-ray source CAL 87
Pei, Songpeng; Li, Qiang; Zhang, Xiaowan +1 more
In this study we present an analysis of the archival X-ray data of the eclipsing supersoft X-ray binary CAL 87 observed with the Chandra Advanced CCD Imaging Spectrometer (ACIS) camera and Low Energy Transmission Grating (LETG) in 2001 August and with XMM-Newton in 2003 April. The high-resolution X-ray spectra are almost unchanged on the two diffe…
Exploring the faintest end of mid-infrared luminosity functions up to z ≃ 5 with the JWST CEERS survey
Kilerci, Ece; Hashimoto, Tetsuya; Goto, Tomotsugu +6 more
Mid-infrared (MIR) light from galaxies is sensitive to dust-obscured star formation activities because it traces the characteristic emission of dust heated by young, massive stars. By constructing the MIR luminosity functions (LFs), we are able to quantify the overall dusty star formation history and the evolution of galaxies over cosmic time. In …
Signatures of Active Galactic Nucleus Feedback Modes: A Green Bean Galaxy with 150 kpc Jet-induced Radio Emission
Prescott, Moire K. M.; Kapińska, Anna D.; Sanderson, Kelly N. +4 more
Jetted active galactic nuclei (AGN) hosting extended photoionized nebulae provide us with a unique view of the timescales associated with AGN activity. Here, we present a new green bean galaxy at z = 0.304458 ± 0.000007 with large-scale jet-induced radio emission. The spectral energy distributions of the radio components show steep spectral indice…
Absence of nebular He II λ4686 constrains the UV emission from the ultraluminous X-ray pulsar NGC 1313 X-2
Castro Segura, N.; Soria, R.; Middleton, M. +1 more
While much has been learned in recent decades about the X-ray emission of the extragalactic ultraluminous X-ray sources (ULXs), their radiative output in the ultraviolet (UV) band remains poorly constrained. Understanding of the full ULX spectral energy distribution (SED) is imperative to constrain the accretion flow geometry powering them, as wel…
Swift X-ray and UV observations of six Gaia binaries supposedly containing a neutron star
Sbarufatti, B.; Mereghetti, S.; Rea, N. +3 more
Recent observations have led to the discovery of numerous optically selected binaries containing an undetected component with mass consistent with a compact object (neutron star (NS) or white dwarf). Using the Neil Gehrels Swift Observatory, we carried out X-ray and UV observations of a small sample of these binaries. Four systems are wide (with a…
Evolution of spin in the intermediate polar CC sculptoris
Knigge, C.; Scaringi, S.; Castro Segura, N. +6 more
We report on spin variations in the intermediate polar and cataclysmic variable CC Scl, as seen by the Transiting Exoplanet Survey Satellite (TESS). By studying both the spin period and its harmonic, we find that the spin has varied since it was first observed in 2011. We find the latest spin value for the source to be 389.473(6) s, equivalent to …
A refined search for high-velocity gas in the Cygnus Loop supernova remnant
Ritchey, Adam M.; Federman, S. R.; Lambert, David L.
We present the results of a sensitive search for high-velocity gas in interstellar absorption lines associated with the Cygnus Loop supernova remnant (SNR). We examine high-resolution high signal-to-noise ratio optical spectra of six stars in the Cygnus Loop region with distances greater than ~700 pc. All stars show low-velocity Na I and Ca II abs…
Probing Turbulent Scattering Effects on Suprathermal Electrons in the Solar Wind: Modeling, Observations, and Implications
Maksimovic, Milan; Kasper, Justin C.; Kontar, Eduard P. +7 more
This study explores the impact of a turbulent scattering mechanism, akin to those influencing solar and galactic cosmic rays propagating in the interplanetary medium, on the population of suprathermal electrons in the solar wind. We employ a Fokker–Planck equation to model the radial evolution of electron pitch angle distributions under the action…
H3+ absorption and emission in local (U)LIRGs with JWST/NIRSpec: Evidence for high H2 ionization rates
Perna, Michele; Lamperti, Isabella; González-Alfonso, Eduardo +6 more
We study the 3.4 ‑ 4.4 µm fundamental rovibrational band of H3+, a key tracer of the ionization of the molecular interstellar medium (ISM), in a sample of 12 local (d < 400 Mpc) (ultra)luminous infrared galaxies ((U)LIRGs) observed with JWST/NIRSpec. The P, Q, and R branches of the band are detected in 13 out of 20 a…