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Infrared Camera (IRC) Deep Survey in the Performance-Verification Phase
Pearson, C. P.; Ohyama, Y.; Takagi, T. +17 more
We report on the first results of a near- and mid-infrared deep survey with the Infrared Camera (IRC) onboard AKARI in the performance-verification phase. Simultaneous observations by the Near-InfraRed (NIR), Mid-InfraRed Short (MIR-S), and Mid-InfraRed Long (MIR-L) channels of the IRC with effective integration times of 4529, 4908, and 4417 secon…
A Multiple Flare Scenario where the Classic Long-Duration Flare Was Not the Source of a CME
Mandrini, C. H.; van Driel-Gesztelyi, L.; Culhane, J. L. +6 more
A series of flares (GOES class M, M and C) and a CME were observed in close succession on 20 January 2004 in NOAA 10540. Radio observations, which took the form of types II, III and N bursts, were associated with these events. We use the combined observations from TRACE, EIT, Hα images from Kwasan, MDI magnetograms and GOES to understand the compl…
AKARI Observations of Circumstellar Dust in the Globular Clusters NGC 104 and NGC 362
Ohyama, Y.; Matsunaga, N.; Takagi, T. +19 more
We report on preliminary results of AKARI observations of two globular clusters, NGC 104 and NGC 362. Imaging data covering areas of about 10 F_{7} ratio being greater than unity in NGC 362. Six out of the eight have no 2MASS counterparts. However, we found no such source in NGC 104.
Intensity variations inside supergranules
Roudier, Th.; Meunier, N.; Tkaczuk, R.
Context: The convective origin of supergranulation is highly controversial. Past measurements of intensity variations inside supergranules have often been influenced by the brightness enhancement at the cell boundaries due to the magnetic network.
Aims: We conduct a precise determination of intensity variations inside supergranules.
Method…
Monitoring the Variable Interstellar Absorption toward HD 219188 with Hubble Space Telescope STIS
Welty, Daniel E.
We discuss the results of continued optical and UV spectroscopic monitoring of the variable intermediate-velocity (IV) absorption at vsolar=-38 km s-1 toward HD 219188. After reaching maxima in mid-2000, the column densities of both Na I and Ca II in that IV component declined by factors >~2 by the end of 2006. Comparisons…
Star Formation, Radio Sources, Cooling X-Ray Gas, and Galaxy Interactions in the Brightest Cluster Galaxy in 2A0335+096
O'Dea, Christopher P.; Donahue, Megan; Voit, G. Mark +2 more
We present deep emission-line imaging taken with the new SOAR Optical Imager of the brightest cluster galaxy (BCG) in the nearby (z=0.035) X-ray cluster of galaxies 2A0335+096. We also present our analysis of additional, multiwavelength observations for the BCG, including long-slit optical spectroscopy, archival VLA radio data, Chandra X-ray imagi…
J- and Ks-Band Galaxy Counts and Color Distributions in the AKARI North Ecliptic Pole Field
Oyabu, Shinki; Matsuhara, Hideo; Takagi, Toshinobu +5 more
We present the J- and Ks-band galaxy counts and galaxy colors covering 750 arcmin2 in the deep AKARI north ecliptic pole (NEP) field, using the Florida Multi-object Imaging Near-IR Grism Observational Spectrometer on the Kitt Peak National Observatory 2.1 m telescope. The limiting magnitudes with a signal-to-noise ratio of 3 …
Probing the Nature of the G1 Clump Stellar Overdensity in the Outskirts of M31
Lewis, Geraint F.; Ibata, Rodrigo A.; Johnston, Kathryn V. +5 more
We present deep Hubble Space Telescope ACS observations of the G1 clump, a distinct stellar overdensity lying at ~30 kpc along the southwestern major axis of M31, close to the G1 globular cluster (from the work of Ferguson and coworkers). Our well-populated color-magnitude diagram reaches ~7 mag below the red giant branch tip with 90% completeness…
HD 97048's Circumstellar Environment as Revealed by a Hubble Space Telescope ACS Coronagraphic Study of Disk Candidate Stars
Kamp, I.; Meixner, M.; Ardila, D. R. +5 more
We present the results of a coronagraphic scattered-light imaging survey of six young disk candidate stars using the Hubble Space Telescope Advanced Camera for Surveys. The observations made use of the 1.8" occulting spot through the F606W (broad V) filter. Circumstellar material was imaged around HD 97048, a Herbig Ae/Be star located in the Chama…
The Field of the TeV Source HESS J1804-216 in X-Rays and Other Wavelengths
Garmire, G. P.; Pavlov, G. G.; Kargaltsev, O.
The field of the extended TeV source HESS J1804-216 was serendipitously observed with the Chandra ACIS detector on 2005 May 4. The data reveal several X-ray sources within the bright part of HESS J1804-216. The brightest of these objects, CXOU J180432.4-214009, which has been also detected with Swift (2005 November 3) and Suzaku (2006 April 6), is…