Search Publications
A search for eclipsing binaries that host discs
Mamajek, Eric E.; Quillen, Alice C.; Bell, Cameron P. M. +3 more
We search for systems hosting eclipsing discs using a complete sample of eclipsing binaries (EBs); those previously identified in the third phase of the Optical Gravitational Lensing Experiment (OGLE-III). Within a subsample of 2823 high-cadence, high-photometric precision and large eclipsing depth detached EBs previously identified in the Large M…
The X-ray emission of the high-mass X-ray binary IGR J17200-3116
Campana, S.; Tiengo, A.; Moretti, A. +3 more
The source IGR J17200-3116 was discovered in the hard X-ray band by INTEGRAL. A periodic X-ray modulation at ∼326 s was detected in its Swift light curves by our group (and subsequently confirmed by a Swift campaign). In this paper, we report on the analysis of all the Swift observations, which were collected between 2005 and 2011, and of an ∼20 k…
The variable ionized absorber in the Seyfert 2 Mrk 348
Turner, T. J.; Reeves, J. N.; Braito, V. +6 more
We present the results of the analysis of the X-ray spectrum of the Seyfert 2 Mrk 348, observed by Suzaku and XMM-Newton. The overall spectrum of Mrk 348 can be described by a primary power-law continuum seen through three layers of absorption, of which one is neutral and two are ionized. Comparing Suzaku (2008) and XMM-Newton (2002) observations …
The iron K line profile of IRAS 18325-5926
Vaughan, S.; Lobban, A. P.
IRAS 18325-5926 is an X-ray bright, Compton-thin, type 2 Seyfert galaxy and it was the first Seyfert 2 in which the presence of a broad Fe Kα emission line was claimed. However, although the structure of the Fe line appears broad, there is tentative evidence that it may comprise multiple lines. Nevertheless, previous analyses have only consisted o…
Probing the interstellar medium of NGC 1569 with Herschel
Barmby, P.; Lebouteiller, V.; Madden, S. C. +3 more
NGC 1569 has some of the most vigorous star formation among nearby galaxies. It hosts two super star clusters (SSCs) and has a higher star formation rate (SFR) per unit area than other starburst dwarf galaxies. Extended emission beyond the galaxy's optical body is observed in warm and hot ionized and atomic hydrogen gas; a cavity surrounds the SSC…
Testing WMAP data via Planck radio and SZ catalogues
Shanks, T.; Whitbourn, J. R.; Sawangwit, U.
The prime evidence underpinning the standard Λ cold dark matter cosmological model is the cosmic microwave background (CMB) power spectrum as observed by Wilkinson Microwave Anisotropy Probe (WMAP) and other microwave experiments. But Sawangwit and Shanks have recently shown that the WMAP CMB power spectrum is highly sensitive to the beam profile …
Predictions for the detection of Earth and Mars Trojan asteroids by the Gaia satellite
Tanga, P.; Coward, D. M.; Todd, M. +1 more
The European Space Agency Gaia satellite, planned for launch in late 2013, will perform systematic astrometric observations of the whole sky over a five year period. During this mission, many thousands of Solar System objects down to magnitude V = 20 will be observed including near-Earth asteroids and objects at solar elongations as low as 45°, wh…
Hubble Space Telescope and Spitzer point-source detection and optical extinction in powerful narrow-line radio galaxies
Tadhunter, C. N.; Rose, M.; Ramírez, E. A. +4 more
We present an analysis of infrared Hubble Space Telescope (HST) and Spitzer data for a sample of 13 Fanaroff-Riley II (FRII) radio galaxies at 0.03 < z < 0.11 that are classified as narrow-line radio galaxies (NLRGs). In the context of unified schemes for active galactic nuclei (AGNs), our direct view of AGNs in NLRGs is impeded by a parsec-…
Spectroscopy of red giants in the globular cluster Terzan 8: kinematics and evidence for the surrounding Sagittarius stream
Bragaglia, A.; D'Orazi, V.; Carretta, E. +3 more
We present the results of a spectroscopic survey of red giants in the globular cluster Terzan 8 with the aim of studying its kinematics. We derived accurate radial velocities for 82 stars located in the innermost 7 arcmin from the cluster centre identifying 48 bona fide cluster members. The kinematics of the cluster have been compared with a set o…
Direct detection of black holes via electromagnetic radiation
Sobrinho, J. L. G.; Augusto, P.
Many black hole (BH) candidates exist, ranging from supermassive (∼106-1010 M⊙) to stellar masses (∼1-100 M⊙), all of them identified by indirect processes. Although there are no known candidate BHs with substellar masses, these might have been produced in the primordial Universe. BHs emit radiation comp…