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Discovery of X-Ray Pulsations from the INTEGRAL Source IGR J11014-6103
Camilo, F.; Chaty, S.; Rahoui, F. +6 more
We report the discovery of PSR J1101-6101, a 62.8 ms pulsar in IGR J11014-6103, a hard X-ray source with a jet and a cometary tail that strongly suggests it is moving away from the center of the supernova remnant (SNR) MSH 11-61A at v > 1000 km s-1. Two XMM-Newton observations were obtained with the EPIC pn in small window mode, resu…
On the Fe abundance peak formation in cool-core clusters of galaxies: hints from cluster WARPJ1415.1+3612 at z = 1.03
Nonino, Mario; Rosati, Piero; Tozzi, Paolo +5 more
We present a detailed study of the iron content of the core of the high-redshift cluster WARPJ1415.1+3612 (z = 1.03). By comparing the central Fe mass excess observed in this system, MFeexc = (1.67 ± 0.40) × 109 M⊙, with those measured in local cool-core systems, we infer that the bulk of the mass excess…
On the Interaction of the PKS B1358-113 Radio Galaxy with the A1836 Cluster
Simionescu, A.; Cheung, C. C.; Stawarz, Ł. +9 more
Here we present the analysis of multifrequency data gathered for the Fanaroff-Riley type-II (FR II) radio galaxy PKS B1358-113, hosted in the brightest cluster galaxy in the center of A1836. The galaxy harbors one of the most massive black holes known to date, and our analysis of the acquired optical data reveals that this black hole is only weakl…
Intermediate-age Globular Clusters in Four Galaxy Merger Remnants
Schweizer, François; Miller, Bryan W.; Trancho, Gelys +2 more
We present the results of combining Hubble Space Telescope optical photometry with ground-based Ks -band photometry from the Gemini imagers NIRI and FLAMINGOS-I to study the globular cluster (GC) populations in four early-type galaxies that are candidate remnants of recent mergers (NGC 1700, NGC 2865, NGC 4382, and NGC 7727). These gala…
X-Ray Emission from the Super-Earth Host GJ 1214
Schmitt, J. H. M. M.; Czesla, S.; Singh, K. P. +2 more
Stellar activity can produce large amounts of high-energy radiation, which is absorbed by the planetary atmosphere leading to irradiation-driven mass loss. We present the detection and an investigation of high-energy emission in a transiting super-Earth host system, GJ 1214, based on XMM-Newton observations. We derive an X-ray luminosity of L…
Solar filament impact on 21 January 2005: Geospace consequences
Escoubet, C. P.; Tsurutani, B. T.; Cattell, C. +21 more
On 21 January 2005, a moderate magnetic storm produced a number of anomalous features, some seen more typically during superstorms. The aim of this study is to establish the differences in the space environment from what we expect (and normally observe) for a storm of this intensity, which make it behave in some ways like a superstorm. The storm w…
First detection of rotational CO line emission in a red giant branch star
Groenewegen, M. A. T.
Context. For stars with initial masses below ~1 M⊙, the mass loss during the first red giant branch (RGB) phase dominates mass loss in the later asymptotic giant branch (AGB) phase. Nevertheless, mass loss on the RGB is still often parameterised by a simple Reimers law in stellar evolution models.
Aims: To try to detect CO thermal …
Discovery of a correlation between the frequency of the mHz quasi-periodic oscillations and the neutron-star temperature in the low-mass X-ray binary 4U 1636-53
Méndez, Mariano; Altamirano, Diego; Lyu, Ming
We detected millihertz quasi-periodic oscillations (QPOs) in an XMM-Newton observation of the neutron-star low-mass X-ray binary 4U 1636-53. These QPOs have been interpreted as marginally stable burning on the neutron-star surface. At the beginning of the observation the QPO was at around 8 mHz, together with a possible second harmonic. About 12 k…
The Effect of Surface Brightness Dimming in the Selection of High-z Galaxies
Kim, S.; Stiavelli, M.; Bradley, L. +2 more
Cosmological surface brightness (SB) dimming of the form (1 + z)-4 affects all sources. The strong dependence of SB dimming on redshift z suggests the presence of a selection bias when searching for high-z galaxies, i.e., we tend to detect only those galaxies with a high SB. However, unresolved knots of emission are not affected by SB d…
Hard X-ray emission of Sco X-1
Tsygankov, Sergey S.; Revnivtsev, Mikhail G.; Krivonos, Roman A. +1 more
We study hard X-ray emission of the brightest accreting neutron star Sco X-1 with INTEGRAL observatory. Up to now INTEGRAL have collected ∼4 Ms of deadtime corrected exposure on this source. We show that hard X-ray tail in time average spectrum of Sco X-1 has a power-law shape without cutoff up to energies ∼200-300 keV. An absence of the high ener…