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AKARI Infrared Camera Survey of the Large Magellanic Cloud. II. The Near-infrared Spectroscopic Catalog
Onaka, Takashi; Ita, Yoshifusa; Sakon, Itsuki +4 more
We performed a near-infrared spectroscopic survey toward an area of ~10 deg2 of the Large Magellanic Cloud (LMC) with the infrared satellite AKARI. Observations were carried out as part of the AKARI Large-area Survey of the Large Magellanic Cloud (LSLMC). The slitless multi-object spectroscopic capability of the AKARI/IRC enabled us to …
Spectroscopy along Multiple, Lensed Sight Lines through Outflowing Winds in the Quasar SDSS J1029+2623
Gandhi, Poshak; Oguri, Masamune; Misawa, Toru +3 more
We study the origin of absorption features on the blue side of the C IV broad emission line of the large-separation lensed quasar SDSS J1029+2623 at z em ~ 2.197. The quasar images, produced by a foreground cluster of galaxies, have a maximum separation angle of θ ~ 22.''5. The large angular separation suggests that the sight lines to t…
The Massive Star Population in M101. I. The Identification and Spatial Distribution of the Visually Luminous Stars
Humphreys, Roberta M.; Grammer, Skyler
An increasing number of non-terminal giant eruptions are being observed by modern supernova and transient surveys. But very little is known about the origin of these giant eruptions and their progenitors, many of which are presumably very massive, evolved stars. Motivated by the small number of progenitors positively associated with these giant er…
Enigmatic Recurrent Pulsational Variability of the Accreting White Dwarf EQ Lyn (SDSS J074531.92+453829.6)
Drake, A. J.; Hermes, J. J.; Montgomery, M. H. +19 more
Photometric observations of the cataclysmic variable EQ Lyn (SDSS J074531.92+453829.6), acquired from 2005 October to 2006 January, revealed high-amplitude variability in the range 1166-1290 s. This accreting white dwarf underwent an outburst in 2006 October, during which its brightness increased by at least five magnitudes, and it started exhibit…
Studies of NGC 6720 with Calibrated HST/WFC3 Emission-line Filter Images. II. Physical Conditions
O'Dell, C. R.; Henney, W. J.; Ferland, G. J. +1 more
We have performed a detailed analysis of the electron temperature and density in the Ring Nebula using the calibrated Hubble Space Telescope WFC3 images described in the preceding paper. The electron temperature (T e) determined from [N II] and [O III] rises slightly and monotonically toward the central star. The observed equivalent wid…
Studies of NGC 6720 with Calibrated HST/WFC3 Emission-line Filter Images. III. Tangential Motions using AstroDrizzle Images
O'Dell, C. R.; Henney, W. J.; Ferland, G. J. +1 more
We have been able to compare with astrometric precision AstroDrizzle processed images of NGC 6720 (the Ring Nebula) made using two cameras on the Hubble Space Telescope. The time difference of the observations was 12.925 yr. This large time base allowed the determination of tangential velocities of features within this classic planetary nebula. In…
Hubble Space Telescope and Optical Data on SDSSJ0804+5103 (EZ Lyn) One Year after Outburst
Szkody, Paula; Sion, Edward M.; Gänsicke, Boris T. +3 more
We present an ultraviolet (UV) spectrum and light curve of the short orbital period cataclysmic variable EZ Lyn obtained with the Cosmic Origins Spectrograph on the Hubble Space Telescope 14 months after its dwarf nova outburst, along with ground-based optical photometry. The UV spectrum can be fit with a 13,100 K, log g = 8 white dwarf using 0.5 …
The Relationship between the Dense Neutral and Diffuse Ionized Gas in the Thick Disks of Two Edge-on Spiral Galaxies
Hirschauer, Alec S.; Savage, Blair D.; Fox, Andrew J. +3 more
We present high-resolution, optical images (BVI + Hα) of the multiphase interstellar medium (ISM) in the thick disks of the edge-on spiral galaxies NGC 4013 and NGC 4302. Our images from the Hubble Space Telescope (HST), Large Binocular Telescope, and WIYN 3.5 m telescope reveal an extensive population of filamentary dust absorption seen to z ~2-2…
Phase-resolved Infrared Spectroscopy and Photometry of V1500 Cygni, and a Search for Similar Old Classical Novae
Harrison, Thomas E.; Lyke, James E.; Campbell, Randy D.
We present phase-resolved near-infrared photometry and spectroscopy of the classical nova (CN) V1500 Cyg to explore whether cyclotron emission is present in this system. While the spectroscopy do not indicate the presence of discrete cyclotron harmonic emission, the light curves suggest that a sizable fraction of its near-infrared fluxes are due t…
XMM-Newton Observation of the α Persei Cluster
Wolk, Scott J.; Pillitteri, Ignazio; Remage Evans, Nancy +1 more
We report on the analysis of an archival observation of part of the α Persei cluster obtained with XMM-Newton. We detected 102 X-ray sources in the band 0.3-8.0 keV, of which 39 of them are associated with the cluster as evidenced by appropriate magnitudes and colors from Two Micron All Sky Survey photometry. We extend the X-ray luminosity distrib…