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The Advanced Camera for Surveys General Catalog: Structural Parameters for Approximately Half a Million Galaxies
Koekemoer, Anton M.; Conselice, Christopher J.; Weiner, Benjamin +18 more
We present the Advanced Camera for Surveys General Catalog (ACS-GC), a photometric and morphological database using publicly available data obtained with the Advanced Camera for Surveys (ACS) instrument on the Hubble Space Telescope. The goal of the ACS-GC database is to provide a large statistical sample of galaxies with reliable structural and d…
Super fast plasma streams as drivers of transient and anomalous magnetospheric dynamics
Daly, P. W.; Kozak, L.; Amata, E. +12 more
We present multi spacecraft measurements in the magnetosheath (MSH) and in the solar wind (SW) by Interball, Cluster and Polar, demonstrating that coherent structures with magnetosonic Mach number up to 3 - Supermagnetosonic Plasma Streams (SPS) - generate transient and anomalous boundary dynamics, which may cause substantial displacements of the …
Planck intermediate results. I. Further validation of new Planck clusters with XMM-Newton
Böhringer, H.; Kneissl, R.; Dahle, H. +182 more
We present further results from the ongoing XMM-Newton validation follow-up of Planck cluster candidates, detailing X-ray observations of eleven candidates detected at a signal-to-noise ratio of 4.5 < S/N < 5.3 in the same 10-month survey maps used in the construction of the Early SZ sample. The sample was selected in order to test internal …
A Population of z > 2 Far-infrared Herschel-SPIRE-selected Starbursts
Berta, S.; Magnelli, B.; Lutz, D. +29 more
We present spectroscopic observations for a sample of 36 Herschel-SPIRE 250-500 µm selected galaxies (HSGs) at 2 < z < 5 from the Herschel Multi-tiered Extragalactic Survey. Redshifts are confirmed as part of a large redshift survey of Herschel-SPIRE-selected sources covering ~0.93 deg2 in six extragalactic legacy fields. Ob…
The similarity of broad iron lines in X-ray binaries and active galactic nuclei
Fabian, A. C.; Miller, J. M.; Reis, R. C. +2 more
We have compared the 2001 XMM-Newton spectra of the stellar mass black hole binary XTE J1650-500 and the active galaxy MCG-6-30-15, focusing on the broad, excess emission features at ∼4-7 keV displayed by both sources. Such features are frequently observed in both low-mass X-ray binaries and active galactic nuclei (AGN). For the former case it is …
Deep observations of CO line emission from star-forming galaxies in a cluster candidate at z=1.5
Finoguenov, A.; Berta, S.; Magnelli, B. +20 more
We report results from a deep Jansky Very Large Array (JVLA) search for 12CO J = 1-0 line emission from galaxies in a candidate galaxy cluster at z ∼ 1.55 in the COSMOS field. We target four galaxies with optical spectroscopic redshifts in the range z = 1.47-1.59, consistent with the likely redshift for the candidate galaxy cluster. Two…
Hubble Space Telescope Observations of the HD 202628 Debris Disk
Krist, John E.; Stapelfeldt, Karl R.; Plavchan, Peter +1 more
A ring-shaped debris disk around the G2V star HD 202628 (d = 24.4 pc) was imaged in scattered light at visible wavelengths using the coronagraphic mode of the Space Telescope Imaging Spectrograph on the Hubble Space Telescope. The ring is inclined by ~64° from face-on, based on the apparent major/minor axis ratio, with the major axis aligned along…
Multiwavelength Observations of V2775 Ori, an Outbursting Protostar in L 1641: Exploring the Edge of the FU Orionis Regime
Henning, Thomas; Manoj, P.; Kounkel, Marina +9 more
Individual outbursting young stars are important laboratories for studying the physics of episodic accretion and the extent to which this phenomenon can explain the luminosity distribution of protostars. We present new and archival data for V2775 Ori (HOPS 223), a protostar in the L 1641 region of the Orion molecular clouds that was discovered by …
The Solar Wind Energy Flux
Issautier, K.; Meyer-Vernet, N.; Le Chat, G.
The solar-wind energy flux measured near the Ecliptic is known to be independent of the solar-wind speed. Using plasma data from Helios, Ulysses, and Wind covering a large range of latitudes and time, we show that the solar-wind energy flux is independent of the solar-wind speed and latitude within 10 %, and that this quantity varies weakly over t…
What Are Special About Ground-Level Events?. Flares, CMEs, Active Regions and Magnetic Field Connection
Liu, Y.; Nitta, N. V.; Nightingale, R. W. +1 more
Ground level events (GLEs) occupy the high-energy end of gradual solar energetic particle (SEP) events. They are associated with coronal mass ejections (CMEs) and solar flares, but we still do not clearly understand the special conditions that produce these rare events. During Solar Cycle 23, a total of 16 GLEs were registered, by ground-based neu…