Search Publications
The star formation law at GMC scales in M33, the Triangulum galaxy
Smith, Matthew W. L.; Williams, Thomas G.; Gear, Walter K.
We present a high spatial resolution study, on scales of ∼100 pc, of the relationship between star formation rate (SFR) and gas content within Local Group galaxy M33. Combining deep SCUBA-2 observations with archival GALEX, SDSS, WISE, Spitzer, and submillimetre Herschel data, we are able to model the entire SED from UV to sub-mm wavelengths. We c…
A high-density relativistic reflection origin for the soft and hard X-ray excess emission from Mrk 1044
Fabian, A. C.; Pinto, C.; Misra, R. +7 more
We present the first results from a detailed spectral-timing analysis of a long (∼130 ks) XMM-Newton observation and quasi-simultaneous NuSTAR and Swift observations of the highly accreting narrow-line Seyfert 1 galaxy Mrk 1044. The broad-band (0.3-50 keV) spectrum reveals the presence of a strong soft X-ray excess emission below ∼1.5 keV, iron K<…
The VANDELS survey: dust attenuation in star-forming galaxies at z = 3-4
Cimatti, A.; Elbaz, D.; Cullen, F. +15 more
We present the results of a new study of dust attenuation at redshifts 3 < z < 4 based on a sample of 236 star-forming galaxies from the VANDELS spectroscopic survey. Motivated by results from the First Billion Years (FiBY) simulation project, we argue that the intrinsic spectral energy distributions (SEDs) of star-forming galaxies at these …
Hubble PanCET: an isothermal day-side atmosphere for the bloated gas-giant HAT-P-32Ab
Sanz-Forcada, J.; Ehrenreich, D.; Lecavelier des Etangs, A. +21 more
We present a thermal emission spectrum of the bloated hot Jupiter HAT-P-32Ab from a single eclipse observation made in spatial scan mode with the Wide Field Camera 3 (WFC3) aboard the Hubble Space Telescope (HST). The spectrum covers the wavelength regime from 1.123 to 1.644 µm which is binned into 14 eclipse depths measured to an averaged p…
The MUSE-Wide survey: a measurement of the Ly α emitting fraction among z > 3 galaxies
Garel, Thibault; Brinchmann, Jarle; Richard, Johan +15 more
We present a measurement of the fraction of Lyman α (Ly α) emitters (XLy α) amongst HST continuum-selected galaxies at 3 < z < 6 with the Multi-Unit Spectroscopic Explorer (MUSE) on the VLT. Making use of the first 24 MUSE-Wide pointings in GOODS-South, each having an integration time of 1 h, we detect 100 Ly α emitters and find X…
Total molecular gas masses of Planck - Herschel selected strongly lensed hyper luminous infrared galaxies
Magnelli, B.; Frayer, D. T.; Yun, M. S. +8 more
We report the detection of CO(1-0) line emission from seven Planck and Herschel selected hyper luminous ({L_{IR (8-1000{µ m})} > 10^{13} L_{⊙}) infrared galaxies with the Green Bank Telescope (GBT). CO(1-0) measurements are a vital tool to trace the bulk molecular gas mass across all redshifts. Our results place tight constraints on the t…
Star-galaxy classification in the Dark Energy Survey Y1 data set
Bechtol, K.; Smith, M.; Allam, S. +76 more
We perform a comparison of different approaches to star-galaxy classification using the broad-band photometric data from Year 1 of the Dark Energy Survey. This is done by performing a wide range of tests with and without external `truth' information, which can be ported to other similar data sets. We make a broad evaluation of the performance of t…
A 3D model of polarized dust emission in the Milky Way
Delabrouille, Jacques; Martínez-Solaeche, Ginés; Karakci, Ata
We present a three-dimensional model of polarized galactic dust emission that takes into account the variation of the dust density, spectral index and temperature along the line of sight, and contains randomly generated small-scale polarization fluctuations. The model is constrained to match observed dust emission on large scales, and match on sma…
Radio-loudness in black hole transients: evidence for an inclination effect
Motta, S. E.; Casella, P.; Fender, R. P.
Accreting stellar-mass black holes appear to populate two branches in a radio:X-ray luminosity plane. We have investigated the X-ray variability properties of a large number of black hole low-mass X-ray binaries, with the aim of unveiling the physical reasons underlying the radio-loud/radio-quiet nature of these sources, in the context of the know…
The Cygnus Loop's distance, properties, and environment driven morphology
Blair, William P.; Raymond, John C.; Fesen, Robert A. +2 more
The Cygnus Loop is among the brightest and best studied evolved Galactic supernova remnants. However, its distance has remained uncertain thus undermining quantitative understanding about many of its fundamental properties. Here we present moderate-dispersion spectra of three stars with projected locations toward the remnant. Spectra of these star…