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A scientific case for XMM-Newton continuation

McBreen, B.; Schartel, N.

The presentations made at the workshop ``XMM-Newton: The Next Decade'', held at ESAC from 4th to the 6th of July 2007, contained an overwhelming amount of new results and well justified scientific questions that can be addressed by observations with XMM-Newton. XMM-Newton has over the next decade a solid scientific case. Given the high impact of X…

Surveys on magnetospheric plasmas based on the Double Star Project (DSP) exploration

Escoubet, C. P.; Dandouras, I.; Reme, H. +11 more

The equatorial and polar satellites of the Double Star Project (DSP) were launched successfully on December 29, 2003 and July 25, 2004, respectively, and both of them are operating smoothly. The DSP provides a good opportunity for investigating the structure of the magnetosphere. Based on the DSP data collected during 2004, we have surveyed the di…

Is the Optically Unidentified Radio Source FIRST J121839.7+295325 a Dark Lens?

Keeton, C. R.; Ryan, R. E., Jr.; Windhorst, R. A. +2 more

We present evidence that the optically unidentified radio source FIRST J121839.7+295325 may be strongly lensing a background galaxy. We estimate the redshift of the assumed gravitational arc, discovered in parallel imaging with HST, from MMT-Blue Channel spectroscopy to be z_arc = 2.48_-0.05^+0.14. We present lens mod…

Effective temperatures of magnetic CP stars: semi-fundamental data

Stępień, K.; Lipski, Ł.

A brief discussion of earlier determinations of effective temperatures of chemically peculiar stars is given. It is stressed that the effective temperature is a global parameter, important for stellar structure and evolution studies. It should, however, be used with caution in atmospheric investigations. New determinations of effective temperature…

Effects of Solar Magnetic Activity on the Charge States of Minor Ions of Solar Wind

Wurz, Peter; Klecker, Berndt; Wang, Xuyu

We present an investigation of the effects of solar magnetic activity on the charge states of minor ions (Fe, Si, Mg, Ne, O, C) in the solar wind using ACE solar wind data, the "current sheet source surface" (CSSS) model of the corona, and SOHO MDI data during the 23rd solar cycle. We find that the mean charge states indicate a clear trend of incr…

New progress of Double Star-Cluster joint exploration and study

Shen, Chao; Cao, JinBin; Lu, Li +3 more

The magnetic reconnection of magnetosphere and the magnetospheric space storms (including magnetospheric substorm, magnetic storm, magnetospheric particle storm) has long been one of the most challenging subjects in the solar-terrestrial physics. The reconnection mechanism and global triggering process of the magnetospheric space storms are still …

INTEGRAL and RXTE/ASM Observations on IGR J17098-3628

Zhang, Shu; Qu, Jin-Lu; Wang, Jian-Min +5 more

To further probe the possible nature of the unidentified source IGR J17098-3628, we have carried out a detailed analysis of its long-term time variability, as monitored by Rossi X-ray Timing Explorer/All Sky Monitor (RXTE/ASM), and of its hard X-ray properties, as observed by the International Gamma-Ray Astrophysics Laboratory (INTEGRAL). INTEGRAL…

On the probability of cryogenic mud volcanism on Titan

Alekseev, V. A.

Juxtaposing images of the surface of Titan made by the Huygens probe and photos of the mud volcano region on Earth (the Taman peninsula, the Caucasus) reveals similar geomorphologic features. This has led us to suggest the existence of cryogenic mud-volcanic activity on Titan. The role of liquid methane in supporting this process on Titan can be t…

Global-scale near infrared variability on Mars: Analysis of 2003 Mars opposition observations from HST/NICMOS

Wolff, M. J.; Noll, K.; Noe Dobrea, E. +3 more

We have used HST/NICMOS to observe approximately 57% of the martian surface in 7 narrow band filters (0.97, 1.08, 1.13, 1.66, 1.90, 2.12, and 2.15 µm) during the 2003 opposition ( L∼250°) and at a resolution of ∼12 km/pixel. Principal components analysis (PCA) of the dataset has identified regional variability on scales of hundreds of kilome…

Study of Long-lived Radioactive Sources in the Galaxy with INTEGRAL/SPI

Wang, Wei