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Spectroscopic Follow-up of X-Ray Sources in the ChaMPlane Survey: Identification of a New Cataclysmic Variable
van den Berg, M.; Allen, B.; Servillat, M. +3 more
We present a multi-object optical spectroscopy follow-up study of X-ray sources in a field along the Galactic plane (l = 327fdg42, b = 2fdg26) which is part of the Chandra Multi-wavelength Plane survey (ChaMPlane). We obtained spectra for 46 stars, including 15 likely counterparts to X-ray sources, and sources showing an Hα color excess. This has …
The Properties of Two Low-redshift O VI Absorbers and Their Associated Galaxies toward 3c 263
Savage, B. D.; Narayanan, A.; Wakker, B. P. +4 more
Ultraviolet observations of the QSO 3C 263 (z em = 0.652) with Cosmic Origins Spectrograph and FUSE reveal O VI absorption systems at z = 0.06342 and 0.14072. WIYN multi-object spectrograph observations provide information about the galaxies associated with the absorbers. The multi-phase system at z = 0.06342 traces cool photoionized ga…
Systematic Motion of Fine-scale Jets and Successive Reconnection in Solar Chromospheric Anemone Jet Observed with the Solar Optical Telescope/Hinode
Shibata, K.; Isobe, H.; Singh, K. A. P. +1 more
The Solar Optical Telescope (SOT) on board Hinode allows observations with high spatiotemporal resolution and stable image quality. A λ-shaped chromospheric anemone jet was observed in high resolution with SOT/Hinode. We found that several fine-scale jets were launched from one end of the footpoint to the other. These fine-scale jets (~1.5-2.5 Mm)…
Observations from SDO, Hinode, and STEREO of a Twisting and Writhing Start to a Solar-filament-eruption Cascade
Hara, Hirohisa; Moore, Ronald L.; Sterling, Alphonse C.
We analyze data from SDO (AIA, HMI), Hinode (SOT, XRT, EIS), and STEREO (EUVI) of a solar eruption sequence of 2011 June 1 near 16:00 UT, with an emphasis on the early evolution toward eruption. Ultimately, the sequence consisted of three emission bursts and two filament ejections. SDO/AIA 304 Å images show absorbing-material strands initially in …
Hot Diffuse Emission in the Nuclear Starburst Region of NGC 2903
Soria, Roberto; Tennant, Allyn F.; Swartz, Douglas A. +2 more
We present a deep Chandra observation of the central regions of the late-type barred spiral galaxy NGC 2903. The Chandra data reveal soft (kTe ~ 0.2-0.5 keV) diffuse emission in the nuclear starburst region and extending ~2' (~5 kpc) to the north and west of the nucleus. Much of this soft hot gas is likely to be from local active star-f…
Two New Bursting Neutron Star Low-mass X-Ray Binaries: Swift J185003.2-005627 and Swift J1922.7-1716
Altamirano, D.; Degenaar, N.; Wijnands, R. +1 more
We discuss the origin of two triggers of Swift's Burst Alert Telescope (BAT) that occurred in 2011. The triggers were identified with Swift J185003.2-005627, a previously unknown X-ray source, and the known but unclassified X-ray transient Swift J1922.7-1716. We investigate the BAT data and follow-up observations obtained with Swift's X-ray and ul…
First Simultaneous Detection of Moving Magnetic Features in Photospheric Intensity and Magnetic Field Data
Yurchyshyn, Vasyl; Lim, Eun-Kyung; Goode, Philip
The formation and the temporal evolution of a bipolar moving magnetic feature (MMF) was studied with high-spatial and temporal resolution. The photometric properties were observed with the New Solar Telescope at Big Bear Solar Observatory using a broadband TiO filter (705.7 nm), while the magnetic field was analyzed using the spectropolarimetric d…
Bolocam Observations of Two Unconfirmed Galaxy Cluster Candidates from the Planck Early Sunyaev-Zel'dovich Sample
Umetsu, K.; Bridge, C.; Sayers, J. +5 more
We present Bolocam observations of two galaxy cluster candidates reported as unconfirmed in the Planck early Sunyaev-Zel'dovich (eSZ) sample, PLCKESZ G115.71+17.52 and PLCKESZ G189.84-37.24. We observed each of these candidates with Bolocam at 140 GHz from the Caltech Submillimeter Observatory in 2011 October. The resulting images have white noise…
Asymmetry of Hard X-Ray Emissions at Conjugate Footpoints in Solar Flares
Krucker, Säm; Cheng, C. Z.; Yang, Ya-Hui +2 more
The chromospheric double hard X-ray (HXR) sources generally appear at the conjugate footpoints of flaring loops with asymmetric flux distributions. The behavior of such HXR footpoint asymmetry should be affected by several effects simultaneously and cannot be attributed to a single effect easily. In this study, we attempt to address the properties…
Cool Dust in the Outer Ring of NGC 1291
Murphy, E. J.; Armus, L.; Walter, F. +18 more
We examine Herschel Space Observatory images of one nearby prototypical outer ring galaxy, NGC 1291, and show that the ring becomes more prominent at wavelengths longer than 160 µm. The mass of cool dust in the ring dominates the total dust mass of the galaxy, accounting for at least 70% of it. The temperature of the emitting dust in the rin…