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HST and Spitzer Observations of the HD 207129 Debris Ring
Chen, Christine H.; Hines, Dean C.; Rieke, George H. +10 more
A debris ring around the star HD 207129 (G0V; d = 16.0 pc) has been imaged in scattered visible light with the ACS coronagraph on the Hubble Space Telescope (HST) and in thermal emission using MIPS on the Spitzer Space Telescope at λ = 70 µm (resolved) and 160 µm (unresolved). Spitzer IRS (λ = 7-35 µm) and MIPS (λ = 55-90 µ…
Statistical study of O+ transport from the cusp to the lobes with Cluster CODIF data
Dandouras, I.; Klecker, B.; Kistler, L. M. +3 more
Ionospheric origin O+ accelerated in the cusp/cleft region convects over the polar cap and flows along open field lines to the tail lobes. Some O+ in the lobes enters the near-Earth plasma sheet where it is then convected to the inner magnetosphere, while some O+ ends up in the distant tail where it is lost. In ord…
Total Molecular Gas Masses of z ~ 3 Lyman- break Galaxies: CO(J = 1 → 0) Emission in MS 1512-cB58 and the Cosmic Eye
Walter, Fabian; Momjian, Emmanuel; Carilli, Christopher L. +1 more
We report the detection of CO(J = 1 → 0) emission toward the lensed L sstarf UV Lyman-break galaxies (LBGs) MS 1512-cB58 (z = 2.73) and the Cosmic Eye (z = 3.07), using the Expanded Very Large Array. The strength of the CO line emission reveals molecular gas reservoirs with masses of (4.6 ± 1.1) × 108 (µ…
Optical IFU Observations of the Brightest Cluster Galaxy NGC 4696: The Case for a Minor Merger and Shock-excited Filaments
Dopita, M. A.; Farage, C. L.; McGregor, P. J. +1 more
We present deep optical integral-field spectroscopic observations of the nearby (z ~ 0.01) brightest cluster galaxy NGC 4696 in the core of the Centaurus Cluster, made with the Wide Field Spectrograph on the Australian National University 2.3 m telescope at Siding Spring Observatory. We investigate the morphology, kinematics, and excitation of the…
A high charge state coronal mass ejection seen through solar wind charge exchange emission as detected by XMM-Newton
Read, A. M.; Carter, J. A.; Sembay, S.
We present the analysis of an observation by XMM-Newton that exhibits strongly variable, low-energy diffuse X-ray line emission. We reason that this emission is due to localized solar wind charge exchange (SWCX), originating from a passing cloud of plasma associated with a Coronal mass ejection (CME) interacting with neutrals in the Earth's exosph…
The Origin of [O II] in Post-starburst and Red-sequence Galaxies in High-redshift Clusters
Kocevski, D.; Lemaux, B. C.; Lubin, L. M. +3 more
We present the first results from a near-IR spectroscopic campaign of the Cl1604 supercluster at z ~ 0.9 and the cluster RX J1821.6+6827 at z ~ 0.82 to investigate the nature of [O II] λ3727 emission in cluster galaxies at high redshift. Of the 401 members in Cl1604 and RX J1821+6827 confirmed using the Keck II/DEIMOS spectrograph, 131 galaxies ha…
An Assessment of the Energy Budgets of Low-Ionization Nuclear Emission Regions
Eracleous, Michael; Flohic, Hélène M. L. G.; Hwang, Jason A.
Using the spectral energy distributions (SEDs) of the weak active galactic nuclei (AGNs) in 35 low-ionization nuclear emission regions (LINERs) presented in a companion paper, we assess whether photoionization by the weak AGN can power the emission-line luminosities measured through the large (few-arcsecond) apertures used in ground-based spectros…
Observations of energetic electrons up to 200 keV associated with a secondary island near the center of an ion diffusion region: A Cluster case study
Wang, Shui; Li, Xing; Huang, Can +2 more
An antiparallel reconnection event is recognized in the magnetotail, and a secondary island with a strong core magnetic field is identified near the center of the ion diffusion region. In the island, the electron density peaks in the outer region while the dip is in the core region with a strong core magnetic field. A strong electron beam parallel…
Sun to 1 AU propagation and evolution of a slow streamer-blowout coronal mass ejection
Luhmann, J. G.; Li, Y.; Lynch, B. J. +4 more
We present a comprehensive analysis of the evolution of the classic, slow streamer-blowout CME of 1 June 2008 observed by the STEREO twin spacecraft to infer relevant properties of the pre-eruption source region which includes a substantial portion of the coronal helmet streamer belt. The CME was directed ∼40° East of the Sun-Earth line and the He…
Deriving an X-ray luminosity function of dwarf novae based on parallax measurements
Mukai, K.; Osborne, J. P.; Thorstensen, J. R. +1 more
We have derived an X-ray luminosity function using parallax-based distance measurements of a set of 12 dwarf novae, consisting of Suzaku, XMM-Newton and ASCA observations. The shape of the X-ray luminosity function obtained is the most accurate to date, and the luminosities of our sample are concentrated between ~1030 and 1031