Search Publications
Star-formation rates of two GRB host galaxies at z ∼ 2 and a [C II] deficit observed with ALMA
Hashimoto, Tetsuya; Goto, Tomotsugu; Kim, Seong Jin +6 more
The event rate of long gamma-ray bursts (GRBs) is expected to be a useful tracer of cosmic star-formation history. For this purpose, it is necessary to understand what kinds of star formation/galaxies are traced by GRBs. Here we report rest-frame far-infrared (FIR) continuum detections of the GRB 070521 and 080207 host galaxies at z ∼ 2 with Ataca…
XMMU J181227.8-181234: a new ultracompact X-ray binary candidate
in't Zand, J. J. M.; Kuulkers, E.; Keek, L. +3 more
We report the discovery of Type I (thermonuclear) X-ray bursts from the transient source XMMU J181227.8-181234 = XTE J1812-182. We found seven X-ray bursts in Rossi X-ray Timing Explorer observations during the 2008 outburst, confirming the source as a neutron star low-mass X-ray binary. Based on the measured burst fluence and the average recurren…
Not gone with the wind: Planet occurrence is independent of stellar galactocentric velocity
Kipping, David M.; McTier, Moiya A. S.
We demonstrate that planet occurrence does not depend on stellar galactocentric velocity in the Solar neighbourhood. Using Gaia DR2 astrometry and radial velocity data, we calculate 3D galactocentric velocities for 197 090 Kepler field stars, 1647 of which are confirmed planet hosts. When we compare the galactocentric velocities of planet hosts to…
Optical properties of amorphous carbon dust around C-stars: new constraints from 2MASS and Gaia observations
Nanni, Ambra
In this work the optical properties of amorphous carbon (amC) dust condensed around carbon(C)-stars are constrained by comparing the observations for the Large Magellanic Cloud C-stars from the Two Micron All Sky Survey (2MASS) and from the Gaia data release 2 (DR2) with the synthetic photometry obtained by computing dust growth and radiative tran…
A high-resolution, dust-selected molecular cloud catalogue of M33, the Triangulum Galaxy
Smith, Matthew W. L.; Williams, Thomas G.; Gear, Walter K.
We present a catalogue of Giant Molecular Clouds (GMCs) in M33, extracted from cold dust continuum emission. Our GMCs are identified by computing dendrograms. We measure the spatial distribution of these clouds, and characterize their dust properties. Combining these measured properties with CO(J = 2-1) and 21 cm H I data, we calculate the gas-to-…
SPLOT: a snapshot survey for polarized light in optical transients
Covino, S.; Hodgkin, S. T.; Wyrzykowski, Ł. +7 more
We present SPLOT, a small-scale pilot survey to test the potential of snapshot (single epoch) linear imaging polarimetry as a supplementary tool to traditional transient follow-up. Transients exist in a vast volume of observational parameter space and polarimetry has the potential to highlight sources of scientific interest and add value to near r…
Orbits of 14 binaries based on 2018 SOAR speckle observations
Docobo, José A.; Campo, Pedro P.; Horch, Elliott P. +4 more
New data obtained during the 2018 March-April speckle run at the 4.1 m Southern Astrophysical Research (SOAR) telescope located at Cerro Pachón (Chile) allowed us to recalculate the orbits of the following visual binaries: WDS 06478+0020 (STT 157), WDS 07003-2207 (FIN 334Aa,Ab), WDS 07013-0906 (A 671), WDS 10174-5354 (CVN 16Aa,Ab), WDS 12155-3106 …
Spatial and velocity offsets of Galactic masers from the centres of spiral arms
Vallée, Jacques P.
Some theories about the spiral arms of galaxies predict an offset between different tracers of star formation. Our goal in this paper is to find such an offset between the observed locations of radio masers and the locations of the arms, using a recent four-arm model fitted to the CO 1-0 gas. Our method is to compare a recent global four-arm spira…
FIGS: spectral fitting constraints on the star formation history of massive galaxies since the cosmic noon
Finkelstein, Steven L.; Pirzkal, Nor; Hathi, Nimish +16 more
We constrain the stellar population properties of a sample of 52 massive galaxies - with stellar mass log (Ms/M⊙) ≳ 10.5 - over the redshift range 0.5 < z < 2 by use of observer-frame optical and near-infrared slitless spectra from Hubble Space Telescope's ACS and WFC3 grisms. The deep exposures (∼100 ks) allow us to ta…
SLUG IV: a novel forward-modelling method to derive the demographics of star clusters
Calzetti, Daniela; Fumagalli, Michele; Adamo, Angela +1 more
We describe a novel method for determining the demographics of a population of star clusters, for example distributions of cluster mass and age, from unresolved photometry. This method has a number of desirable properties: it fully exploits all the information available in a data set without any binning, correctly accounts for both measurement err…