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A high-mass X-ray binary pulsar 4U 1907+09 with multiple absorption-line features in the spectrum
Tobrej, Mohammed; Rai, Binay; Ghising, Manoj +2 more
We report X-ray observations of the high mass X-ray binary (HMXB) pulsar 4U 1907+09. Spectral and timing analysis of the source has been performed using Nuclear Spectroscopic Telescope Array (NuSTAR) observation. Timing analysis of the photon events revealed the coherent X-ray pulsation of the source with a pulse period of 442.92 ± 0.03 s. It is o…
A Catalog of Young Stellar Objects from the LAMOST and ZTF Surveys
Zhang, Jingyi; Zhang, Yanxia; Kang, Zihan +2 more
As astronomical data sets become too large for traditional analysis approaches, more machine-learning algorithms are employed in astronomy. A wealth of light variation data have been accumulated, which provide rich samples for astronomers to study variable stars. Facing the challenge of big data, this article takes the classification of variable a…
Solar activity relations in energetic electron events measured by the MESSENGER mission
Lario, D.; Rodríguez-Pacheco, J.; Wimmer-Schweingruber, R. F. +10 more
Aims: We perform a statistical study of the relations between the properties of solar energetic electron (SEE) events measured by the MESSENGER mission from 2010 to 2015 and the parameters of the respective parent solar activity phenomena in order to identify the potential correlations between them. During the time of analysis, the MESSENGER …
VLBI imaging of high-redshift galaxies and protoclusters at low radio frequencies with the International LOFAR Telescope
van Weeren, R. J.; Röttgering, H. J. A.; Miley, G. K. +4 more
It is generally known that luminous, ultra-steep spectrum radio sources are preferentially associated with massive galaxies at high redshifts. In this paper, we describe a pilot project directed at such objects to demonstrate the feasibility and importance of using the LOw-Frequency ARray (LOFAR) data to study the most distant massive galaxies und…
Verification of Gaia Data Release 3 Single-lined Spectroscopic Binary Solutions With Three Transiting Low-mass Secondaries
Bieryla, Allyson; Latham, David W.; Quinn, Samuel N. +18 more
While secondary mass inferences based on single-lined spectroscopic binary (SB1) solutions are subject to $\sin i$ degeneracies, this degeneracy can be lifted through the observations of eclipses. We combine the subset of Gaia Data Release 3 SB1 solutions consistent with brown dwarf-mass secondaries with the Transiting Exoplanet Survey Satellite (…
Investigating Whistler-Mode Wave Intensity Along Field Lines Using Electron Precipitation Measurements
Zhang, Xiao-Jia; Angelopoulos, Vassilis; Tsai, Ethan +1 more
Electron fluxes in Earth's radiation belts are significantly affected by their resonant interaction with whistler-mode waves. This wave-particle interaction often occurs via first cyclotron resonance and, when intense and nonlinear, can accelerate subrelativistic electrons to relativistic energies while also scattering them into the atmospheric lo…
Discovery and Timing of Millisecond Pulsars with the Arecibo 327 MHz Drift-scan Survey
Freire, Paulo C. C.; Deneva, Julia S.; McLaughlin, Maura A. +6 more
We present the discovery and timing solutions of four millisecond pulsars (MSPs) discovered in the Arecibo 327 MHz Drift-Scan Pulsar Survey. Three of these pulsars are in binary systems, consisting of a redback (PSR J2055+1545), a black widow (PSR J1630+3550), and a neutron star-white dwarf binary (PSR J2116+1345). The fourth MSP, PSR J2212+2450, …
"Four new compact triply eclipsing triples found with Gaia and TESS
Rappaport, Saul A.; Borkovits, Tamás; Mitnyan, Tibor +2 more
This paper presents a comprehensive analysis of four triply eclipsing triple star systems, namely TIC 88206187, TIC 14839347, TIC 298714297, and TIC 66893949. The four systems with third-body eclipses were found in the TESS light curves from among a sample of ~400 matches between known eclipsing binaries and the Gaia DR3 Non-Single Star solution d…
Col-OSSOS: Evidence for a Compositional Gradient Inherited from the Protoplanetary Disk?
Marsset, Michaël; Fraser, Wesley C.; Pike, Rosemary E. +8 more
In the present-day Kuiper Belt, the number of compositional classes and the orbital distributions of these classes hold important cosmogonic implications for the solar system. The Colours of the Outer Solar System Origins Survey (Col-OSSOS) recently showed that the observed color distribution of small (H ⪆ 6) trans-Neptunian objects (TNOs) can be …
MICROSCOPE's view at gravitation
Bergé, Joel
The weak equivalence principle (WEP) is the cornerstone of general relativity (GR). Testing it is thus a natural way to confront GR to experiments, which has been pursued for four centuries with increasing precision. MICROSCOPE is a space mission designed to test the WEP with a precision of 1 in 1015 parts, two orders of magnitude bette…