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Milky Way dust extinction measured with QSOs
Wolf, Christian
We investigate reddening by Milky Way dust in the low-extinction regime of E(B - V) < 0.15. Using over 50 000 QSOs at 0.5 < z < 2.5 from the Sloan Digital Sky Survey (SDSS) data release 7 (DR7) QSO Catalogue, we probe the residual SDSS colours after dereddening and correcting for the known spectroscopic redshifts. We find that the extinct…
Initiation and Early Evolution of the Coronal Mass Ejection on 2009 May 13 from Extreme-ultraviolet and White-light Observations
Reva, A. A.; Ulyanov, A. S.; Kuzin, S. V. +1 more
We present the results of the observations of a coronal mass ejection (CME) that occurred on 2009 May 13. The most important feature of these observations is that the CME was observed from the very early stage (the solar surface) up to a distance of 15 solar radii (R ⊙). Below 2 R ⊙, we used the data from the TESIS extreme-ul…
CDM/baryon isocurvature perturbations in a sneutrino curvaton model
Kawasaki, Masahiro; Harigaya, Keisuke; Hayakawa, Taku +1 more
Matter isocurvature perturbations are strictly constrained from cosmic microwave background observations. We study a sneutrino curvaton model where both cold dark matter (CDM)/baryon isocurvature perturbations are generated. In our model, total matter isocurvature perturbations are reduced since the CDM/baryon isocurvature perturbations compensate…
Herschel-ATLAS/GAMA: How does the far-IR luminosity function depend on galaxy group properties?
Ivison, R. J.; Dunne, L.; Eales, S. +15 more
We use the Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS) Phase I data to study the conditional luminosity function of far-IR (250 µm) selected galaxies in optically selected galaxy groups from the Galaxy And Mass Assembly (GAMA) spectroscopic survey, as well as environmental effects on the far-IR-to-optical colour. We applied …
Forecast of solar proton flux profiles for well-connected events
Moon, Yong-Jae; Ji, Eun-Young; Park, Jinhye
We have developed a forecast model of solar proton flux profiles (> 10 MeV channel) for well-connected events. Among 136 solar proton events (SPEs) from 1986 to 2006, we select 49 well-connected ones that are all associated with single X-ray flares stronger than M1 class and start to increase within 4 h after their X-ray peak times. These event…
Do Solar Coronal Holes Affect the Properties of Solar Energetic Particle Events?
Arge, C. N.; Gopalswamy, N.; Kahler, S. W. +1 more
The intensities and timescales of gradual solar energetic particle (SEP) events at 1 AU may depend not only on the characteristics of shocks driven by coronal mass ejections (CMEs), but also on large-scale coronal and interplanetary structures. It has long been suspected that the presence of coronal holes (CHs) near the CMEs or near the 1-AU magne…
Episodic star formation in a group of LAEs at z = 5.07.
Mas-Hesse, J. M.; Cava, A.; Gonzalez-Martin, O. +10 more
We are undertaking a search for high-redshift low-luminosity Lyman Alpha sources in the SHARDS (Survey for High-z Absorption Red and Dead Sources) survey. Among the pre-selected Lyman Alpha sources two candidates were spotted, located 3.19 arcsec apart, and tentatively at the same redshift. Here, we report on the spectroscopic confirmation with Gr…
Initial Results from NuSTAR Observations of the Norma Arm
Hailey, Charles J.; Mori, Kaya; Bauer, Franz E. +13 more
Results are presented for an initial survey of the Norma Arm gathered with the focusing hard X-Ray Telescope NuSTAR. The survey covers 0.2 deg2 of sky area in the 3-79 keV range with a minimum and maximum raw depth of 15 ks and 135 ks, respectively. Besides a bright black-hole X-ray binary in outburst (4U 1630-47) and a new X-ray transi…
On Thermal-Pulse-Driven Plasma Flows in Coronal Funnels as Observed by the Hinode/ EUV Imaging Spectrometer (EIS)
Srivastava, A. K.; Konkol, P.; Murawski, K. +2 more
Using one-arcsecond-slit-scan observations from the Hinode/EUVImagingSpectrometer (EIS) on 5 February 2007, we find the plasma outflows in the open and expanding coronal funnels at the eastern boundary of AR 10940. The Doppler-velocity map of Fe XII 195.120 Å shows the diffuse closed-loop system to be mostly red-shifted. The open arches (funnels) …
A Herschel and BIMA study of the sequential star formation near the W 48A H II region
Hill, T.; White, G. J.; André, Ph. +22 more
We present the results of Herschel HOBYS (Herschel imaging survey of OB Young Stellar objects) photometric mapping combined with Berkeley Illinois Maryland Association (BIMA) observations and additional archival data, and perform an in-depth study of the evolutionary phases of the star-forming clumps in W 48A and their surroundings. Age estimates …