Search Publications
Resolving the outer ring of HD 38206 using ALMA and constraining limits on planets in the system
Launhardt, Ralf; Booth, Mark; Krivov, Alexander V. +3 more
HD 38206 is an A0V star in the Columba association, hosting a debris disc first discovered by IRAS. Further observations by Spitzer and Herschel showed that the disc has two components, likely analogous to the asteroid and Kuiper belts of the Solar system. The young age of this star makes it a prime target for direct imaging planet searches. Possi…
The magnetic system SMSS J1606-1000 as a period bouncer
Vennes, Stéphane; Buckley, D. A. H.; Zejda, M. +7 more
We report the discovery of a rare close binary system, SMSS J160639.78-100010.7, comprising a magnetic white dwarf with a field of about 30 MG and a brown dwarf. We measured an orbital period of 92 min which is consistent with the photometric period. Minimum and maximum light occur at the orbital quadratures Φ = 0.25 and 0.75, respectively, and ca…
Radio Counterparts of Gamma-Ray Sources in the Cygnus Region
Benaglia, Paula; Ishwara-Chandra, C. H.; Colazo, Marcelo E. +3 more
The view of the gamma-ray universe is being continuously expanded by space high-energy (HE) and ground-based very-high-energy (VHE) observatories. Yet, the angular resolution limitation still precludes a straightforward identification of these gamma-ray emitting sources. Radio observations are an effective tool for searching their possible counter…
Searching For Transiting Planets Around Halo Stars. I. Sample Selection and Validation
Zinn, Joel C.; Johnson, Jennifer A.; Wang, Ji +3 more
By measuring the elemental abundances of a star, we can gain insight into the composition of its initial gas cloud-the formation site of the star and its planets. Planet formation requires metals, the availability of which is determined by the elemental abundance. In the case where metals are extremely deficient, planet formation can be stifled. T…
Shocked Molecular Hydrogen and Broad CO Lines from the Interacting Supernova Remnant HB 3
Reach, W. T.; Rho, J.; Koo, B. -C. +6 more
We present the detections of shocked molecular hydrogen (H2) gas in near- and mid-infrared and broad CO in millimeter from the mixed-morphology supernova remnant (SNR) HB 3 (G132.7+1.3) using the Palomar Wide-field InfraRed Camera, the Spitzer GLIMPSE360 and Wide-field Infrared Survey Explorer (WISE) surveys, and the Heinrich Hertz Subm…
Network of Star Formation: Fragmentation Controlled by Scale-dependent Turbulent Pressure and Accretion onto the Massive Cores Revealed in the Cygnus-X GMC Complex
Qiu, Keping; Li, Guang-Xing; Cao, Yue
Molecular clouds have complex density structures produced by processes including turbulence and gravity. We propose a triangulation-based method to dissect the density structure of a molecular cloud and study the interactions between dense cores and their environments. In our approach, a Delaunay triangulation is constructed, which consists of edg…
Towards realistic modelling of the astrometric capabilities of MCAO systems: detecting an intermediate-mass black hole with MAVIS
Monty, Stephanie; Mendel, J. Trevor; Fiorentino, Giuliana +9 more
Accurate astrometry is a key deliverable for the next generation of multiconjugate adaptive optics (MCAO) systems. The MCAO-Assisted Visible Imager and Spectrograph (MAVIS) is being designed for the Very Large Telescope Adaptive Optics Facility and must achieve 150 $\mu$as astrometric precision (50 $\mu$as goal). To test this before going on-sky, …
Dust Temperature of Compact Star-forming Galaxies at z ∼ 1-3 in 3D-HST/CANDELS
Chen, Zuyi; Fang, Guanwen; Lin, Zesen +3 more
Recent simulation studies suggest that the compaction of star-forming galaxies (SFGs) at high redshift might be a critical process, during which the central bulge is being rapidly built, followed by quenching of the star formation. To explore dust properties of SFGs with compact morphology, we investigate the dependence of dust temperature, T…
A fundamental plane in X-ray binary activity of external galaxies
Ueda, Yoshihiro; Inoue, Yoshiyuki; Yabe, Kiyoto
We construct a new catalog of extragalactic X-ray binaries (XRBs) by matching the latest Chandra source catalog with local galaxy catalogs. Our XRB catalog contains 4430 XRBs hosted by 237 galaxies within ~130 Mpc. As XRBs dominate the X-ray activity in galaxies, the catalog enables us to study the correlations between the total X-ray luminosity o…
A search for X-ray absorbed sources in the 3XMM catalogue using photometric redshifts and Bayesian spectral fits
Georgantopoulos, I.; Corral, A.; Ruiz, A.
Since its launch in 1999, the XMM-Newton mission has compiled the largest catalogue of serendipitous X-ray sources, with the 3XMM being the third version of this catalogue. This was possible thanks to the combination of a large effective area (5000 cm2 at 1 keV) and a wide field of view (30 arcmin). The 3XMM-DR6 catalogue contains about…