Search Publications
IC 348-SMM2E: a Class 0 proto-brown dwarf candidate forming as a scaled-down version of low-mass stars
Li, Di; Myers, Philip C.; Bouy, Hervé +7 more
We report on Submillimeter Array observations of the 870 µm continuum and CO (3-2), 13CO (2-1), and C18O (2-1) line emission of a faint object, SMM2E, near the driving source of the HH 797 outflow in the IC 348 cluster. The continuum emission shows an unresolved source for which we estimate a mass of gas and dust of 30 …
A three-dimensional extinction map of the Galactic anticentre from multiband photometry
Schultheis, M.; Huang, Y.; Chen, B. -Q. +8 more
We present a three-dimensional extinction map in the r band. The map has a spatial angular resolution, depending on latitude, between 3 and 9 arcmin and covers the entire Xuyi Schmidt Telescope Photometric Survey of the Galactic Anticentre (XSTPS-GAC) survey area of over 6000 deg2 for Galactic longitude 140 < l < 240 deg and latit…
Herschel-ATLAS: properties of dusty massive galaxies at low and high redshifts
Smail, I.; Ivison, R. J.; Ibar, E. +16 more
We present a comparison of the physical properties of a rest-frame 250-µm-selected sample of massive, dusty galaxies from 0 < z < 5.3. Our sample comprises 29 high-redshift submillimetre galaxies (SMGs) from the literature and 843 dusty galaxies at z < 0.5 from the Herschel-Astrophysical TeraHertz Large Area Survey (H-ATLAS), select…
On the lack of X-ray bright Type IIP supernovae
Dwarkadas, V. V.
Type IIP supernovae (SNe) are expected to arise from red supergiant stars (RSGs). These stars have observed mass-loss rates that span more than two orders of magnitude, from less than 10^{-6} M_{⊙} yr-1 to almost 10^{-4} M_{⊙} yr-1. Thermal bremsstrahlung X-ray emission from at least some IIPs should reflect the larger end of…
A search for flares and mass ejections on young late-type stars in the open cluster Blanco-1
Lammer, H.; Guenther, E. W.; Khodachenko, M. L. +5 more
We present a search for stellar activity (flares and mass ejections) in a sample of 28 stars in the young open cluster Blanco-1. We use optical spectra obtained with European Southern Observatory's Visible Multi-Object Spectrograph installed on the Very Large Telescope. From the total observing time of ∼5 h, we find four Hα flares but no distinct …
Spatially resolved velocity maps of halo gas around two intermediate-redshift galaxies
Johnson, Sean D.; Chen, Hsiao-Wen; Gauthier, Jean-René +3 more
Absorption-line spectroscopy of multiply-lensed QSOs near a known foreground galaxy provides a unique opportunity to go beyond the traditional one-dimensional application of QSO probes and establish a crude three-dimensional map of halo gas around the galaxy that records the line-of-sight velocity field at different locations in the gaseous halo. …
CLASH: z ∼ 6 young galaxy candidate quintuply lensed by the frontier field cluster RXC J2248.7-4431
Infante, L.; Zheng, W.; Molino, A. +37 more
We present a quintuply lensed z ∼ 6 candidate discovered in the field of the galaxy cluster RXC J2248.7-4431 (z ∼ 0.348) targeted within the Cluster Lensing and Supernova survey with Hubble (CLASH) and selected in the deep Hubble Space Telescope (HST) frontier fields survey. Thanks to the CLASH 16-band HST imaging, we identify the quintuply lensed…
HerMES: point source catalogues from Herschel-SPIRE observations II
Buat, V.; Wang, L.; Bock, J. +18 more
The Herschel Multi-tiered Extragalactic Survey (HerMES) is the largest Guaranteed Time Key Programme on the Herschel Space Observatory. With a wedding cake survey strategy, it consists of nested fields with varying depth and area totalling ∼380 deg2. In this paper, we present deep point source catalogues extracted from Herschel-Spectral…
Methanol along the path from envelope to protoplanetary disc
Walsh, Catherine; Harsono, Daniel; van Dishoeck, Ewine F. +2 more
Interstellar methanol is considered to be a parent species of larger, more complex organic molecules. A physicochemical simulation of infalling parcels of matter is performed for a low-mass star-forming system to trace the chemical evolution from cloud to disc. An axisymmetric 2D semi-analytic model generates the time-dependent density and velocit…
Kinematics and simulations of the stellar stream in the halo of the Umbrella Galaxy
Zibetti, S.; Martínez-Delgado, D.; Strader, J. +9 more
We study the dynamics of faint stellar substructures around the Umbrella Galaxy, NGC 4651, which hosts a dramatic system of streams and shells formed through the tidal disruption of a nucleated dwarf elliptical galaxy. We elucidate the basic characteristics of the system (colours, luminosities, stellar masses) using multiband Subaru/Suprime-Cam im…