Search Publications
Detection of 2460 double-lined spectroscopic binary candidates in the LAMOST-MRS using projected rotational velocities and a binary spectral model
Han, Zhanwen; Kovalev, Mikhail; Chen, Xuefei
We present a new method for the detection of double-lined spectroscopic binaries (SB2s) using Vsin i values from spectral fits. The method is tested on synthetic and real spectra from the Large Sky Area Multi-Object fiber Spectroscopic Telescope Medium Resolution Survey. It can reliably detect SB2 candidates for double-lined binaries with $V \sin …
An INTEGRAL/SPI view of reticulum II: particle dark matter and primordial black holes limits in the MeV range
Calore, Francesca; Vincent, Aaron C.; Diehl, Roland +4 more
Reticulum II (Ret II) is a satellite galaxy of the Milky Way (MW) and presents a prime target to investigate the nature of dark matter (DM) because of its high mass-to-light ratio. We evaluate a dedicated INTEGRAL observation campaign data set to obtain γ-ray fluxes from Ret II and compare those with expectations from DM. Ret II is not detected in…
The XMM Cluster Survey analysis of the SDSS DR8 redMaPPer catalogue: implications for scatter, selection bias, and isotropy in cluster scaling relations
Nichol, R. C.; Miller, C. J.; Romer, A. K. +21 more
In this paper, we present the X-ray analysis of Sloan Digital Sky Survey DR8 redMaPPer (SDSSRM) clusters using data products from the XMM Cluster Survey (XCS). In total, 1189 SDSSRM clusters fall within the XMM-Newton footprint. This has yielded 456 confirmed detections accompanied by X-ray luminosity (LX) measurements. Of these cluster…
Five young δ Scuti stars in the Pleiades seen with Kepler/K2
Li, Yaguang; Bedding, Timothy R.; White, Timothy R. +4 more
We perform mode identification for five δ Scuti stars in the Pleiades star cluster, using custom light curves from K2 photometry. By creating échelle diagrams, we identify radial and dipole mode ridges, comprising a total of 28 radial and 16 dipole modes across the five stars. We also suggest possible identities for those modes that lie offset fro…
Stellar and black hole assembly in z < 0.3 infrared-luminous mergers: intermittent starbursts versus super-Eddington accretion
Lebouteiller, Vianney; Pearson, Chris; Clements, David L. +20 more
We study stellar and black hole mass assembly in a sample of 42 infrared-luminous galaxy mergers at z < 0.3 by combining results from radiative transfer modelling with archival measures of molecular gas and black hole mass. The ratios of stellar mass, molecular gas mass, and black hole mass to each other are consistent with those of massive gas…
Improving blazar redshift constraints with the edge of the Ly α forest: 1ES 1553+113 and implications for observations of the WHIM
Narayanan, A.; Sameer; Charlton, J. +6 more
Blazars are some of the brightest ultraviolet (UV) and X-ray sources in the sky and are valuable probes of the elusive warm-hot intergalactic medium (WHIM; T ≃ 105-107 K). However, many of the brightest blazars - called BL Lac objects such as 1ES 1553+113 - have quasi-featureless spectra and poorly constrained redshifts. Here…
The value-added catalogue of ASAS-SN eclipsing binaries: parameters of 30 000 detached systems
Kochanek, C. S.; Stanek, K. Z.; Thompson, Todd A. +6 more
Detached eclipsing binaries are a fundamental tool for measuring the physical parameters of stars that are effectively evolving in isolation. Starting from more than 40 000 eclipsing binary candidates identified by the All-Sky Automated Survey for Supernovae (ASAS-SN), we use PHOEBE to determine the sum of the fractional radii, the ratio of effect…
Chromosome maps of globular clusters from wide-field ground-based photometry
Milone, A. P.; Cordoni, G.; Marino, A. F. +10 more
Hubble Space Telescope (HST) photometry is providing an extensive analysis of globular clusters (GCs). In particular, the pseudo-two-colour diagram dubbed 'chromosome map (ChM)' allowed to detect and characterize their multiple populations with unprecedented detail. The main limitation of these studies is the small field of view of HST, which make…
The white dwarf binary pathways survey - VIII. A post-common envelope binary with a massive white dwarf and an active G-type secondary star
Gänsicke, B. T.; Rebassa-Mansergas, A.; Raddi, R. +6 more
The white dwarf binary pathways survey is dedicated to studying the origin and evolution of binaries containing a white dwarf and an intermediate-mass secondary star of the spectral type A, F, G, or K (WD + AFGK). Here, we present CPD-65 264, a new post-common envelope binary with an orbital period of 1.37 d that contains a massive white dwarf ($0…
Eclipsing white dwarf binaries in Gaia and the Zwicky Transient Facility
Belokurov, Vasily; Breedt, Elmé; Hodgkin, Simon +4 more
Gaia provided the largest ever catalogue of white dwarf stars. We use this catalogue, along with the third public data release of the Zwicky Transient Facility (ZTF), to identify new eclipsing white dwarf binaries. Our method exploits light-curve statistics and the box least-squares algorithm to detect periodic light-curve variability. The search …