Search Publications
Further Evidence for Large Central Mass-to-light Ratios in Early-type Galaxies: The Case of Ellipticals and Lenticulars in the A262 Cluster
Saglia, R. P.; Thomas, J.; Bender, R. +3 more
We present new radially resolved spectroscopy of eight early-type galaxies in the A262 cluster. The measurements include stellar rotation, velocity dispersion, H 3 and H 4 coefficients of the line-of-sight velocity distribution along the major and minor axes and an intermediate axis as well as line-strength index profiles of …
Bursty escape fluxes in plasma sheets of Mars and Venus
Fedorov, A.; Barabash, S.; Lundin, R. +5 more
High resolution measurements of plasma in the plasma sheets of Mars and Venus performed by almost identical plasma instruments ASPERA-3 on the Mars Express spacecraft and ASPERA-4 on Venus Express reveal similar features of bursty fluxes of escaping planetary ions. A period of bursts lasts about 1-2 min. Simultaneous magnetic field measurements on…
The hard X-ray emission of X Persei
Santangelo, A.; Doroshenko, V.; Kreykenbohm, I. +1 more
We present an analysis of the spectral properties of the peculiar X-ray pulsar
CHEERS Results on Mrk 573: A Study of Deep Chandra Observations
Elvis, Martin; Karovska, Margarita; Fabbiano, Giuseppina +2 more
We present results on Mrk 573 obtained as part of the CHandra survey of Extended Emission-line Regions in nearby Seyfert galaxies (CHEERS). Previous studies showed that this source features a biconical emission in the soft X-ray band closely related to the narrow-line region as mapped by the [O III] emission line and the radio emission, though on …
Boulders on Lutetia
Lara, L. M.; Bertaux, J. -L.; Lamy, P. +37 more
More than 200 boulders are among the many prominent geological features seen on Lutetia by the OSIRIS cameras onboard Rosetta. Most are concentrated around the central crater in Baetica regio with a few more apparently associated with Patavium crater. The size range of boulders visible to OSIRIS is about 60-300 m. We model the trajectories of boul…
Accreting magnetars: a new type of high-mass X-ray binaries?
Reig, P.; Torrejón, J. M.; Blay, P.
The discovery of very slow pulsations (Pspin =5560 s) has solved the long-standing question of the nature of the compact object in the high-mass X-ray binary 4U 2206+54 but has posed new ones. According to spin evolutionary models in close binary systems, such slow pulsations require a neutron star magnetic field strength larger than th…
Mars exospheric thermal and non-thermal components: Seasonal and local variations
Leblanc, F.; Modolo, R.; Hess, S. +3 more
A model of the martian exosphere is built for average solar conditions. A Chamberlain’s approach (Chamberlain, J.W. [1963]. Planet. Space Sci. 11, 901) is used to describe the O, CO, CO2, and O2 thermal exospheric components. The average thermal oxygen density at 300 km in altitude varies by about one order of magnitude with …
The AKARI NEP-Deep survey: a mid-infrared source catalogue
Im, M.; Lee, H. M.; White, G. J. +13 more
We present a new catalogue of mid-IR sources using the AKARI NEP-Deep survey. The InfraRed Camera (IRC) onboard AKARI has a comprehensive mid-IR wavelength coverage with 9 photometric bands at 2-24 µm. We utilized all of these bands to cover a nearly circular area adjacent to the north ecliptic pole (NEP). We designed the catalogue to includ…
The Absence of Ex-companions in Type Ia Supernova Remnants
Kilic, Mukremin; Di Stefano, R.
Type Ia supernovae (SNe Ia) play important roles in our study of the expansion and acceleration of the universe, but because we do not know the exact nature or natures of the progenitors, there is a systematic uncertainty that must be resolved if SNe Ia are to become more precise cosmic probes. No progenitor system has ever been identified either …
Physical properties of trans-neptunian binaries (120347) Salacia-Actaea and (42355) Typhon-Echidna
Buie, M. W.; Rieke, G. H.; Roe, H. G. +7 more
We report new Hubble Space Telescope and Spitzer Space Telescope results concerning the physical properties of the trans-neptunian object (TNO) binaries (120347) Salacia-Actaea (formerly 2004 SB60), and (42355) Typhon-Echidna (formerly 2002 CR46). The mass of the (120347) Salacia-Actaea system is 4.66 ± 0.22 × 1020…