Search Publications
Missions
Journals
Publication Years
All-sky Guide Star Catalog for CSST
Tian, Hao; Wang, Wei; Zhang, Xin +17 more
The China Space Station Telescope (CSST) is a two-meter space telescope with multiple back-end instruments. The Fine Guidance Sensor (FGS) is an essential subsystem of the CSST Precision Image Stability System to ensure the required absolute pointing accuracy and line-of-sight stabilization. In this study, we construct the Main Guide Star Catalog …
The TRAPUM Small Magellanic Cloud pulsar survey with MeerKAT - II. Nine new radio timing solutions and glitches from young pulsars
Liu, Y.; Haberl, F.; Venter, C. +17 more
We report new radio timing solutions from a 3-yr observing campaign conducted with the MeerKAT and Murriyang telescopes for nine Small Magellanic Cloud pulsars, increasing the number of characterized rotation-powered extragalactic pulsars by 40 per cent. We can infer from our determined parameters that the pulsars are seemingly all isolated, that …
Cometary ion drift energy and temperature at comet 67P/Churyumov-Gerasimeko
Nilsson, Hans; Stenberg Wieser, Gabriella; Moeslinger, Anja +4 more
The Ion Composition Analyzer (ICA) on the Rosetta spacecraft observed both the solar wind and the cometary ionosphere around comet 67P/Churyumov-Gerasimenko for nearly two years. However, observations of low energy cometary ions were affected by a highly negative spacecraft potential, and the ICA ion density estimates were often much lower than pl…
Multi-epoch UV–X-Ray Spectral Study of NGC 4151 with AstroSat
Papadakis, I. E.; Singh, K. P.; Dewangan, G. C. +8 more
We present a multiwavelength spectral study of NGC 4151 based on five epochs of simultaneous AstroSat observations in the near-ultraviolet (NUV) to hard X-ray band (∼0.005–80 keV) during 2017–2018. We derived the intrinsic accretion disk continuum after correcting for internal and Galactic extinction, contributions from broad- and narrow-line regi…
The Nature of a Recently Discovered Wolf–Rayet Binary: Archetype of Stripping?
Massey, Philip; Morrell, Nidia I.; Penny, Laura R. +2 more
LMCe055-1 was recently discovered in a survey for Wolf–Rayets (WRs) in the Large Magellanic Cloud, and classified as a WN4/O4, a lower-excitation version of the WN3/O3 class discovered as part of the same survey. Its absolute magnitude precluded it from being a WN4+O4 binary. Optical Gravitational Lensing Experiment photometry shows shallow primar…
NIKA2 observations of starless cores in Taurus and Perseus
Berta, S.; Aussel, H.; Adam, R. +49 more
Dusty starless cores play an important role in regulating the initial phases of the formation of stars and planets. In their interiors, dust grains coagulate and ice mantles form, thereby changing the millimeter emissivities and hence the ability to cool. We mapped four regions with more than a dozen cores in the nearby Galactic filaments of Tauru…
Asteroid (4337) Arecibo: Two ice-rich bodies forming a binary. Based on Gaia astrometric data
Hestroffer, Daniel; David, Pedro; Desmars, Josselin +1 more
Context. Binary asteroids are present in all populations of the Solar System, from near-Earth to trans-Neptunian regions. As is true for the small Solar System bodies (SSSBs), binary asteroids generally offer valuable insights into the formation of the Solar System, as well as its collisions and dynamic evolution. In particular, the binaries provi…
Investigation of the Nonthermal X-Ray Emission from the Supernova Remnant CTB 37B Hosting the Magnetar CXOU J171405.7-381031
An, Hongjun; Mori, Kaya; Safi-Harb, Samar +4 more
We present a detailed X-ray investigation of a region (S1) exhibiting nonthermal X-ray emission within the supernova remnant (SNR) CTB 37B hosting the magnetar CXOU J171405.7‑381031. Previous analyses modeled this emission with a power law (PL), inferring various values for the photon index (Γ) and absorbing column density (N H). Based …
Search for spectroscopic binaries using rotational velocities in five open clusters observed by ESO
Kovalev, Mikhail; Asa'd, Randa; Ahmed, Mariyam
In this paper we detect double-lined spectroscopic binaries (SB2) in five open clusters: NGC 2243, NGC 2420, NGC 3532, NGC 6253, and NGC 6705 (M 11) using a method based on high values of the projected rotational velocity when they are fitted with single star spectral model. Observed spectra were obtained from the European Southern Observatory arc…
Evidence for a Close-in Tertiary Orbiting around the Algol-type System HZ Dra with Tidal Splitting and Spots Activities
Matekov, Azizbek; Li, Lin-Jia; Qian, Sheng-Bang +7 more
We report a cyclic variation of the O ‑ C diagram with a semiamplitude of 0.0033 days and a period of 1.05 yr for the pulsating eclipsing binary HZ Dra. The cyclic variation can be explained by the light travel-time effect via the presence of a close-in third body orbiting around HZ Dra in an elliptical orbit with a maximum semimajor axis of 0.89 …