Search Publications
What Does the Milky Way Look Like?
Hao, C. J.; Xu, Y.; Hou, L. G. +5 more
In spite of much work, the overall spiral structure morphology of the Milky Way remains somewhat uncertain. In the last two decades, accurate distance measurements have provided us with an opportunity to solve this issue. Using the precise locations of very young objects, for the first time, we propose that our galaxy has a multiple-arm morphology…
Spectral shapes of the Ly α emission from galaxies - II. The influence of stellar properties and nebular conditions on the emergent Ly α profiles
Scarlata, Claudia; Rivera-Thorsen, T. Emil; Gronke, Max +2 more
We demonstrate how the stellar and nebular conditions in star-forming galaxies modulate the emission and spectral profile of H I Ly α emission line. We examine the net Ly α output, kinematics, and in particular emission of blueshifted Ly α radiation, using spectroscopy from with the Cosmic Origins Spectrograph on Hubble Space Telescope (HST), givi…
Hunting for dark matter and new physics with GECCO
Moiseev, A. A.; Profumo, Stefano; Baring, Matthew G. +9 more
We outline the science opportunities in the areas of searches for dark matter and new physics offered by a proposed future MeV gamma-ray telescope, the Galactic Explorer with a Coded Aperture Mask Compton Telescope (GECCO). We point out that such an instrument would play a critical role in opening up a discovery window for particle dark matter wit…
Calibration of hybrid resolved star formation rate recipes based on PHANGS-MUSE Hα and Hβ maps
Leroy, Adam K.; Glover, Simon C. O.; Klessen, Ralf S. +17 more
Mapping star-formation rates (SFR) within galaxies is key to unveiling their assembly and evolution. Calibrations exist for computing the SFR from a combination of ultraviolet and infrared bands for galaxies as integrated systems, but their applicability to sub-galactic (kiloparsec) scales remains largely untested. We used integral field spectrosc…
The Cosmic Ultraviolet Baryon Survey (CUBS) - VI. Connecting physical properties of the cool circumgalactic medium to galaxies at z ≈ 1
Faucher-Giguère, Claude-André; Johnson, Sean D.; Zahedy, Fakhri S. +12 more
This paper presents a newly established sample of 19 unique galaxies and galaxy groups at redshift z = 0.89-1.21 in six QSO fields from the Cosmic Ultraviolet Baryon Survey (CUBS), designated as the CUBSz1 sample. In this sample, nine galaxies or galaxy groups show absorption features, while the other 10 systems exhibit 2σ upper limits of $\log N …
A Systematic Search for Short-period Close White Dwarf Binary Candidates Based on Gaia EDR3 Catalog and Zwicky Transient Facility Data
Cheng, Sihao; Li, Chengyuan; Tang, Baitian +4 more
Galactic short-period close white dwarf binaries (CWDBs) are important objects for space-borne gravitational-wave (GW) detectors in the millihertz frequency bands. Due to the intrinsically low luminosity, only about 25 identified CWDBs are detectable by the Laser Interferometer Space Antenna (LISA), which are also known as verification binaries (V…
A Gaia view of the optical and X-ray luminosities of compact binary millisecond pulsars
Linares, Manuel; Koljonen, Karri I. I.
In this paper, we study compact binary millisecond pulsars with low- and very low-mass companion stars (spiders) in the Galactic field, using data from the latest Gaia data release (DR3). We infer the parallax distances of the optical counterparts to spiders, which we use to estimate optical and X-ray luminosities. We compare the parallax distance…
Implications of the Milky Way Travel Velocity for Dynamical Mass Estimates of the Local Group
Price-Whelan, Adrian M.; Peñarrubia, Jorge; Besla, Gurtina +4 more
The total mass of the Local Group (LG) is a fundamental quantity that enables interpreting the orbits of its constituent galaxies and placing the LG in a cosmological context. One of the few methods that allows inferring the total mass directly is the "Timing Argument," which models the relative orbit of the Milky Way (MW) and M31 in equilibrium. …
Starlight-polarization-based tomography of the magnetized ISM: PASIPHAE's line-of-sight inversion method
Eriksen, H. K.; Ghosh, T.; Pearson, T. J. +20 more
We present the first Bayesian method for tomographic decomposition of the plane-of-sky orientation of the magnetic field with the use of stellar polarimetry and distance. This standalone tomographic inversion method presents an important step forward in reconstructing the magnetized interstellar medium (ISM) in three dimensions within dusty region…
First Detection of X-Ray Polarization from the Accreting Neutron Star 4U 1820-303
Kaaret, Philip; Wu, Kinwah; Enoto, Teruaki +117 more
This paper reports the first detection of polarization in the X-rays for atoll-source 4U 1820-303, obtained with the Imaging X-ray Polarimetry Explorer (IXPE) at 99.999% confidence level (CL). Simultaneous polarimetric measurements were also performed in the radio with the Australia Telescope Compact Array. The IXPE observations of 4U 1820-303 wer…