Search Publications
The GALAH Survey: second data release
Lewis, Geraint F.; Ting, Yuan-Sen; Casey, Andrew R. +41 more
The Galactic Archaeology with HERMES (GALAH) survey is a large-scale stellar spectroscopic survey of the Milky Way, designed to deliver complementary chemical information to a large number of stars covered by the Gaia mission. We present the GALAH second public data release (GALAH DR2) containing 342 682 stars. For these stars, the GALAH collabora…
Low-redshift Lyman continuum leaking galaxies with high [O III]/[O II] ratios
Schaerer, D.; Thuan, T. X.; Izotov, Y. I. +4 more
We present observations with the Cosmic Origins Spectrograph (COS) onboard the Hubble Space Telescope of five star-forming galaxies at redshifts z in the range 0.2993-0.4317 and with high emission-line flux ratios O32 = [O III] λ5007/[O II] λ3727 ∼ 8-27 aiming to detect the Lyman continuum (LyC) emission. We detect LyC emission in all g…
ATLASGAL - properties of a complete sample of Galactic clumps
König, C.; Menten, K. M.; Smith, M. D. +15 more
The APEX Telescope Large Area Survey of the Galaxy (ATLASGAL) is an unbiased 870 µm submillimetre survey of the inner Galactic plane (|ℓ| < 60° with |b| < 1.5°). It is the largest and most sensitive ground-based submillimetre wavelength Galactic survey to date and has provided a large and systematic inventory of all massive, dense clum…
The outflow structure of GW170817 from late-time broad-band observations
Troja, E.; Piro, L.; van Eerten, H. +6 more
We present our broad-band study of GW170817 from radio to hard X-rays, including NuSTAR and Chandra observations up to 165 d after the merger, and a multimessenger analysis including LIGO constraints. The data are compared with predictions from a wide range of models, providing the first detailed comparison between non-trivial cocoon and jet model…
Discovery of pulsations from NGC 300 ULX1 and its fast period evolution
Haberl, F.; Vasilopoulos, G.; Maitra, C. +1 more
The supernova impostor SN 2010da located in the nearby galaxy NGC 300, later identified as a likely supergiant B[e] high-mass X-ray binary, was simultaneously observed by NuSTAR and XMM-Newton between 2016 December 16 and 20, over a total time span of ∼310 ks. We report the discovery of a strong periodic modulation in the X-ray flux with a pulse p…
On the use of Gaia magnitudes and new tables of bolometric corrections
Casagrande, L.; VandenBerg, Don A.
The availability of reliable bolometric corrections and reddening estimates, rather than the quality of parallaxes, will be one of the main limiting factors in determining the luminosities of a large fraction of Gaia stars. With this goal in mind, we provide GaiaGBP, G, and GRP synthetic photometry for the entire MARCS grid a…
J1154+2443: a low-redshift compact star-forming galaxy with a 46 per cent leakage of Lyman continuum photons
Schaerer, D.; Thuan, T. X.; Izotov, Y. I. +5 more
We report the detection of the Lyman continuum (LyC) radiation of the compact star-forming galaxy (SFG) J1154+2443 observed with the Cosmic Origins Spectrograph (COS) onboard the Hubble Space Telescope. This galaxy, at a redshift of z = 0.3690, is characterized by a high emission-line flux ratio O32 = [O III] λ5007/[O II] λ3727 = 11.5. …
The Next Generation Transit Survey (NGTS)
Jordán, Andrés; Wheatley, Peter J.; Bayliss, Daniel +43 more
We describe the Next Generation Transit Survey (NGTS), which is a ground-based project searching for transiting exoplanets orbiting bright stars. NGTS builds on the legacy of previous surveys, most notably WASP, and is designed to achieve higher photometric precision and hence find smaller planets than have previously been detected from the ground…
The extreme faint end of the UV luminosity function at z ∼ 6 through gravitational telescopes: a comprehensive assessment of strong lensing uncertainties
Richard, Johan; Schaerer, Daniel; Kneib, Jean-Paul +1 more
With the Hubble Frontier Fields program, gravitational lensing has provided a powerful way to extend the study of the ultraviolet luminosity function (LF) of galaxies at z ∼ 6 down to unprecedented magnitude limits. At the same time, significant discrepancies between different studies were found at the very faint end of the LF. In an attempt to un…
Dark Energy Survey Year 1 results: weak lensing shape catalogues
Benoit-Lévy, A.; Bechtol, K.; Smith, M. +105 more
We present two galaxy shape catalogues from the Dark Energy Survey Year 1 data set, covering 1500 deg2 with a median redshift of 0.59. The catalogues cover two main fields: Stripe 82, and an area overlapping the South Pole Telescope survey region. We describe our data analysis process and in particular our shape measurement using two in…