Search Publications
Measuring weak lensing masses on individual clusters
Melin, Jean-Baptiste; Bartlett, James G.; Murray, Calum +1 more
We present weak lensing mass estimates for a sample of 458 galaxy clusters from the redMaPPer Sloan Digital Sky Survey DR8 catalogue using Hyper Suprime-Cam weak lensing data. We develop a method to quickly estimate cluster masses from weak lensing shear and use this method to estimate weak lensing masses for each of the galaxy clusters in our sam…
Identification, mass, and age of primary red clump stars from spectral features derived with the LAMOST DR7
Luo, A. -Li; Chen, Yu-Qin; He, Xu-Jiang
Although red clump (RC) stars are easy to identify due to their stability of luminosity and colour, about 20-50 per cent are actually red giant branch (RGB) stars in the same location on the HR diagram. In this paper, a sample of 210 504 spectra for 184 318 primary RC (PRC) stars from the LAMOST DR7 is identified, which has a purity of higher than…
MUSE sneaks a peek at extreme ram-pressure stripping events - V. Towards a complete view of the galaxy cluster A1367
Fumagalli, Michele; Yoshida, Michitoshi; Fossati, Matteo +6 more
We present an analysis of the kinematics and ionization conditions in a sample composed of seven star-forming galaxies undergoing ram-pressure stripping in the A1367 cluster, and the galaxy ESO137-001 in the Norma cluster. MUSE observations of two new galaxies in this sample, CGCG097-073 and CGCG097-079, are also presented. This sample is characte…
J-PLUS: a catalogue of globular cluster candidates around the M 81/M 82/NGC 3077 triplet of galaxies
Chies-Santos, Ana L.; Cenarro, A. Javier; Dupke, Renato +16 more
Globular clusters (GCs) are proxies of the formation assemblies of their host galaxies. However, few studies exist targeting GC systems of spiral galaxies up to several effective radii. Through 12-band Javalambre Photometric Local Universe Survey (J-PLUS) imaging, we study the point sources around the M 81/M 82/NGC 3077 triplet in search of new GC…
Herschel-ATLAS Data Release III: near-infrared counterparts in the South Galactic Pole field - another 100 000 submillimetre galaxies
Ivison, R. J.; Negrello, M.; Dunne, L. +6 more
In this paper, we present the third data release (DR3) of the Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS). We identify likely near-infrared counterparts to submillimetre sources in the South Galactic Pole (SGP) field using the VISTA VIKING survey. We search for the most probable counterparts within 15 arcsec of each Herschel sourc…
The Pristine Inner Galaxy Survey (PIGS) - IV. A photometric metallicity analysis of the Sagittarius dwarf spheroidal galaxy
Lewis, Geraint F.; Buder, Sven; Zucker, Daniel B. +15 more
We present a comprehensive metallicity analysis of the Sagittarius dwarf spheroidal galaxy (Sgr dSph) using Pristine CaHK photometry. We base our member selection on Gaia EDR3 astrometry, applying a magnitude limit at G0 = 17.3, and our population study on the metallicity-sensitive photometry from the Pristine Inner Galaxy Survey (PIGS)…
The peculiar spectral evolution of the new X-ray transient MAXI J0637-430
Huang, Y.; Zhang, S.; Soria, R. +15 more
We studied the transient Galactic black hole candidate MAXI J0637-430 with data from Insight-HXMT, Swift, and XMM-Newton. The broad-band X-ray observations from Insight-HXMT help us constrain the power-law component. MAXI J0637-430 is located at unusually high Galactic latitude; if it belongs to the Galactic thick disc, we suggest a most likely di…
Is there a sub-parsec-scale jet base in the nearby dwarf galaxy NGC 4395?
Ho, Luis C.; Paragi, Zsolt; Nyland, Kristina +6 more
NGC 4395 is a dwarf galaxy at a distance of about 4.3 Mpc (scale: ~0.021 pc mas-1). It hosts an intermediate-mass black hole (IMBH) with a mass between ~104 and ~105 solar masses. The early radio observations of NGC 4395 with the very long baseline interferometry (VLBI) network, High Sensitivity Array (HSA), at 1.4…
Phobos and Deimos surface composition: search for spectroscopic analogues
Barucci, M. A.; Fornasier, S.; Matsuoka, M. +6 more
Phobos and Deimos, the two satellites of Mars, were largely studied in the past using ground-based telescope and spacecraft data, although most of the data were obtained by opportunity observations performed by Mars dedicated orbiters. Despite the data available so far, the main composition of the two moons is not yet fully understood. The possibl…
A GALAH view of the chemical homogeneity and ages of stellar strings identified in Gaia
Hawkins, Keith; Maas, Zachary G.; Manea, Catherine
The advent of Gaia has led to the discovery of nearly 300 elongated stellar associations (called 'strings') spanning hundreds of parsecs in length and mere tens of parsecs in width. These newfound populations present an excellent laboratory for studying the assembly process of the Milky Way thin disc. In this work, we use data from GALAH DR3 to in…