Search Publications
Variations of the ISM Compactness Across the Main Sequence of Star Forming Galaxies: Observations and Simulations
Zezas, A.; Groves, B.; Ashby, M. L. N. +7 more
The majority of star-forming galaxies follow a simple empirical correlation in the star formation rate (SFR) versus stellar mass (M*) plane, of the form {{SFR}}\propto {M}*α , usually referred to as the star formation main sequence (MS). The physics that sets the properties of the MS is currently a subject of debat…
Suzaku X-ray observation of the GK Persei dwarf nova outburst in 2015
Ishida, Manabu; Hayashi, Takayuki; Yuasa, Takayuki
The intermediate polar GK Per exhibited a dwarf nova outburst in 2015 March-April. Suzaku X-ray telescope serendipitously captured the onset of the outburst during its pre-scheduled pointing observation spanning four days. In this paper, we present temporal and spectral analysis results of this outburst, together with those from archival data of q…
Constraining the properties of transitional discs in Chamaeleon I with Herschel
Pinte, C.; Duchêne, G.; Bouy, H. +4 more
Transitional discs are protoplanetary discs with opacity gaps/cavities in their dust distribution, a feature that may be linked to planet formation. We perform Bayesian modelling of the three transitional discs SZ Cha, CS Cha, and T25 including photometry from the Herschel Space Observatory to quantify the improvements added by these new data. We …
Comparison of lunar red spots including the crater copernicus
Ivanov, M.; Korokhin, V.; Kaydash, V. +4 more
The lunar red spots, Helmet, Hansteen Alpha, and the NW quadrant of the crater Copernicus, were selected for a complex comparative investigation of their characteristics measured by the spacecraft Clementine, LRO, and Chandrayaan-1. For the analysis we used the following parameters: the reflectance A(750 nm), color-ratio A(750 nm)/A(415 nm), param…
Unveiling the radio counterparts of two binary AGN candidates: J1108+0659 and J1131-0204
Bondi, M.; Piconcelli, E.; Pérez-Torres, M. A. +1 more
The sources SDSS J113126.08-020459.2 and SDSS J110851.04+065901.4 are two double-peaked [O III] emitting active galactic nuclei (AGNs), identified as candidate binary AGNs by optical and near infrared (NIR) observations. We observed the two sources with high resolution Very Long Baseline Interferometry (VLBI) using the European VLBI Network at 5 G…
Geomorphology of Lowell crater region on the Moon
Srivastava, N.; Varatharajan, I.
Surface topography, surface morphology and crater chronology studies have been carried out for the Lowell crater region (occupying ∼198 × 198 km2 in the northwestern quadrant of the Orientale basin) using Kaguya TC-DTM, LRO-WAC data, and Chandrayaan-1 M3-750 nm image, to characterize and date Lowell impact event and to identi…
NuSTAR Observations of Magnetar 1E 1048.1-5937
Yang, C.; Guillot, S.; Kaspi, V. M. +5 more
We report on simultaneous Nuclear Spectroscopic Telescope Array (NuSTAR) and XMM-Newton observations of the magnetar 1E 1048.1-5937, along with Rossi X-ray Timing Explorer (RXTE) data for the same source. The NuSTAR data provide a clear detection of this magnetar’s persistent emission up to 20 keV. We detect a previously unreported small secondary…
Testing Relativistic Reflection and Resolving Outflows in PG 1211+143 with XMM-Newton and NuSTAR
Vaughan, S.; Reeves, J. N.; Pounds, K. +1 more
We analyze the broad-band X-ray spectrum (0.3-50 keV) of the luminous Seyfert 1/quasar PG 1211+143—the archetypal source for high-velocity X-ray outflows—using near-simultaneous XMM-Newton and NuSTAR observations. We compare pure relativistic reflection models with a model including the strong imprint of photoionized emission and absorption from a…
Constraining White Dwarf Structure and Neutrino Physics in 47 Tucanae
Kalirai, J. S.; Heyl, J.; Tremblay, P. E. +2 more
We present a robust statistical analysis of the white dwarf cooling sequence in 47 Tucanae. We combine Hubble Space Telescope UV and optical data in the core of the cluster, Modules for Experiments in Stellar Evolution (MESA) white dwarf cooling models, white dwarf atmosphere models, artificial star tests, and a Markov Chain Monte Carlo sampling m…
A revised gyro-age for M67 from Kepler/K2-Campaign-5 light curves
Gonzalez, Guillermo
We revisit the photometric variability of stars in the M67 field using Kepler/K2-Campaign-5 light curves. In our previous work, we limited the search area around M67 to that of a recent ground-based study. In the present work, we expand the search area and apply a more rigorous period-finding algorithm to determine the rotation periods of 98 main-…