Search Publications
Early science with the Large Millimeter Telescope: observations of extremely luminous high-z sources identified by Planck
Terlevich, E.; Terlevich, R.; Yun, Min S. +17 more
We present 8.5 arcsec resolution 1.1-mm continuum imaging and CO spectroscopic redshift measurements of eight extremely bright submillimetre galaxies identified from the Planck and Herschel surveys, taken with the Large Millimeter Telescope's AzTEC and Redshift Search Receiver instruments. We compiled a candidate list of high-redshift galaxies by …
A comprehensive comparative test of seven widely used spectral synthesis models against multi-band photometry of young massive-star clusters
Östlin, G.; Cignoni, M.; Calzetti, D. +13 more
We test the predictions of spectral synthesis models based on seven different massive-star prescriptions against Legacy ExtraGalactic UV Survey (LEGUS) observations of eight young massive clusters in two local galaxies, NGC 1566 and NGC 5253, chosen because predictions of all seven models are available at the published galactic metallicities. The …
Detecting direct collapse black holes: making the case for CR7
van den Bosch, Frank C.; Natarajan, Priyamvada; Zackrisson, Erik +4 more
We propose that one of the sources in the recently detected system CR7 by Sobral et al. through spectrophotometric measurements at z = 6.6 harbours a direct collapse black hole (DCBH). We argue that the LW radiation field required for direct collapse in source A is provided by sources B and C. By tracing the LW production history and star formatio…
A shock front at the radio relic of Abell 2744
Kneib, J. -P.; Eckert, D.; Vazza, F. +5 more
Radio relics are Mpc-scale diffuse radio sources at the peripheries of galaxy clusters which are thought to trace outgoing merger shocks. We present XMM-Newton and Suzaku observations of the galaxy cluster Abell 2744 (z = 0.306), which reveal the presence of a shock front 1.5 Mpc east of the cluster core. The surface-brightness jump coincides with…
Supervoids in the WISE-2MASS catalogue imprinting cold spots in the cosmic microwave background
Finelli, F.; Paci, F.; García-Bellido, J. +2 more
The Cold Spot (CS) is a clear feature in the cosmic microwave background (CMB); it could be of primordial origin, or caused by a intervening structure along the line of sight. We identified a large projected underdensity in the recently constructed WISE-2MASS all-sky infrared galaxy catalogue aligned with the CS direction at (l, b) ≈ (209°, -57°).…
Long-term observations of the pulsars in 47 Tucanae - I. A study of four elusive binary systems
van den Berg, M.; Heinke, C. O.; Camilo, F. +11 more
For the past couple of decades, the Parkes radio telescope has been regularly observing the millisecond pulsars in 47 Tucanae (47 Tuc). This long-term timing programme was designed to address a wide range of scientific issues related to these pulsars and the globular cluster where they are located. In this paper, the first of a series, we address …
Almost gone: SN 2008S and NGC 300 2008OT-1 are fainter than their progenitors
Kochanek, C. S.; Stanek, K. Z.; Shappee, B. J. +3 more
We present late-time Hubble and Spitzer Space Telescope (SST) imaging of SN 2008S and NGC 300 2008OT-1, the prototypes of a common class of stellar transients whose true nature is debated. Both objects are still fading and are now >15 times fainter than their progenitors in the mid-IR and are undetected in the optical and near-IR. Data from the…
The 2016 Feb 19 outburst of comet 67P/CG: an ESA Rosetta multi-instrument study
Jorda, L.; Lamy, P. L.; Stern, S. A. +93 more
On 2016 Feb 19, nine Rosetta instruments serendipitously observed an outburst of gas and dust from the nucleus of comet 67P/Churyumov-Gerasimenko. Among these instruments were cameras and spectrometers ranging from UV over visible to microwave wavelengths, in situ gas, dust and plasma instruments, and one dust collector. At 09:40 a dust cloud deve…
The dust-scattering component of X-ray extinction: effects on continuum fitting and high-resolution absorption edge structure
García, J.; Wilms, J.; Baganoff, F. +1 more
Small angle scattering by dust grains causes a significant contribution to the total interstellar extinction for any X-ray instrument with sub-arcminute resolution (Chandra, Swift, XMM-Newton). However, the dust-scattering component is not included in the current absorption models: phabs, TBabs, and TBnew. We simulate a large number of Chandra spe…
Quantifying the UV-continuum slopes of galaxies to z ∼ 10 using deep Hubble+Spitzer/IRAC observations
Wilkins, Stephen M.; Labbé, Ivo; Bouwens, Rychard J. +5 more
Measurements of the UV-continuum slopes β provide valuable information on the physical properties of galaxies forming in the early universe, probing the dust reddening, age, metal content, and even the escape fraction. While constraints on these slopes generally become more challenging at higher redshifts as the UV-continuum shifts out of the Hubb…