Search Publications
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…
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 …
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…
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…
Highly collisional regions determined by interplanetary magnetic field structures
Lai, H. R.; Russell, C. T.; Jia, Y. D. +3 more
Submicron debris released in interplanetary collisions gets charged in the solar wind and generates disturbances to the magnetic field environment. The unique magnetic field disturbances, named interplanetary field enhancements (IFEs) are recorded by many spacecraft. In this study, we have developed a novel model to trace the IFEs to their origins…
Hidden cooling flows in elliptical galaxies
Fabian, A. C.; Pinto, C.; Ferland, G. J. +4 more
The radiative cooling time of hot gas in the cool cores of many galaxy clusters and massive elliptical galaxies drops in the centre to below
AuriDESI: mock catalogues for the DESI Milky Way Survey
Miquel, Ramon; Sanchez, Eusebio; Grand, Robert J. J. +31 more
The Dark Energy Spectroscopic Instrument Milky Way Survey (DESI MWS) will explore the assembly history of the Milky Way by characterizing remnants of ancient dwarf galaxy accretion events and improving constraints on the distribution of dark matter in the outer halo. We present mock catalogues that reproduce the selection criteria of MWS and the f…
The origin of large emission line widths in massive galaxies at redshifts z 3-4
Papovich, C.; Glazebrook, K.; Kacprzak, G. G. +5 more
We present a sample of 22 massive galaxies with stellar masses >1010 M⊙ at 3 < z < 4 with deep H and K-band high resolution spectra (R = 3500-3000) from Keck/MOSFIRE and VLT/KMOS near-infrared spectrographs. We find a large fraction have strong [O III] 5007 and Hβ emission lines with large line widths (σ 100-450 km s…
WISDOM Project - XIX. Figures of merit for supermassive black hole mass measurements using molecular gas and/or megamaser kinematics
Williams, Thomas G.; Cappellari, Michele; Davis, Timothy A. +7 more
The mass (MBH) of a supermassive black hole (SMBH) can be measured using spatially resolved kinematics of the region where the SMBH dominates gravitationally. The most reliable measurements are those that resolve the smallest physical scales around the SMBHs. We consider here three metrics to compare the physical scales probed by kinema…