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Bolometric and UV Light Curves of Core-collapse Supernovae
Brown, Peter J.; Pritchard, T. A.; Roming, P. W. A. +2 more
The Swift UV-Optical Telescope (UVOT) has been observing core-collapse supernovae (CCSNe) of all subtypes in the UV and optical since 2005. Here we present 50 CCSNe observed with the Swift UVOT, analyzing their UV properties and behavior. Where we have multiple UV detections in all three UV filters (λ c = 1928-2600 Å), we generate earl…
Type IIb Supernova SN 2011dh: Spectra and Photometry from the Ultraviolet to the Near-infrared
Foley, Ryan J.; Bieryla, Allyson; Berlind, Perry +26 more
We report spectroscopic and photometric observations of the Type IIb SN 2011dh obtained between 4 and 34 days after the estimated date of explosion (May 31.5 UT). The data cover a wide wavelength range from 2000 Å in the ultraviolet (UV) to 2.4 µm in the near-infrared (NIR). Optical spectra provide line profiles and velocity measurements of …
Stellar Metallicity of the Extended Disk and Distance of the Spiral Galaxy NGC 3621
Hosek, Matthew W., Jr.; Bresolin, Fabio; Kudritzki, Rolf-Peter +2 more
Low resolution (~4.5 Å) ESO VLT/FORS spectra of blue supergiant stars are analyzed to determine stellar metallicities (based on elements such as iron, titanium, and magnesium) in the extended disk of the spiral galaxy, NGC 3621. Mildly subsolar metallicity (-0.30 dex) is found for the outer objects beyond 7 kpc, independent of galactocentric radiu…
Wide-field Hubble Space Telescope Observations of the Globular Cluster System in NGC 1399
Maccarone, Thomas J.; Goudfrooij, Paul; Puzia, Thomas H. +3 more
We present a comprehensive high spatial resolution imaging study of globular clusters (GCs) in NGC 1399, the central giant elliptical cD galaxy in the Fornax galaxy cluster, conducted with the Advanced Camera for Surveys (ACS) aboard the Hubble Space Telescope (HST). Using a novel technique to construct drizzled point-spread function libraries for…
ALMA Observations of a Misaligned Binary Protoplanetary Disk System in Orion
Hughes, A. Meredith; Di Francesco, James; Johnstone, Doug +6 more
We present Atacama Large Millimeter/Submillimeter Array (ALMA) observations of a wide binary system in Orion, with projected separation 440 AU, in which we detect submillimeter emission from the protoplanetary disks around each star. Both disks appear moderately massive and have strong line emission in CO 3-2, HCO+ 4-3, and HCN 3-2. In …
Hierarchical Star Formation in Nearby LEGUS Galaxies
Gouliermis, Dimitrios A.; Grebel, Eva K.; Smith, Linda J. +19 more
Hierarchical structure in ultraviolet images of 12 late-type LEGUS galaxies is studied by determining the numbers and fluxes of nested regions as a function of size from ~1 to ~200 pc, and the number as a function of flux. Two starburst dwarfs, NGC 1705 and NGC 5253, have steeper number-size and flux-size distributions than the others, indicating …
Warm Molecular Gas in Luminous Infrared Galaxies
Sanders, D. B.; Inami, H.; Isaak, K. G. +18 more
We present our initial results on the CO rotational spectral line energy distribution (SLED) of the J to J-1 transitions from J = 4 up to 13 from Herschel SPIRE spectroscopic observations of 65 luminous infrared galaxies (LIRGs) in the Great Observatories All-Sky LIRG Survey. The observed SLEDs change on average from one peaking at J <= 4 to a …
Discovery of the Transient Magnetar 3XMM J185246.6+003317 near Supernova Remnant Kesteven 79 with XMM-Newton
Safi-Harb, Samar; Terada, Yukikatsu; Ge, Ming-Yu +5 more
We report the serendipitous discovery with XMM-Newton that 3XMM J185246.6+003317 is an 11.56 s X-ray pulsar located 1' away from the southern boundary of supernova remnant Kes 79. The spin-down rate of 3XMM J185246.6+003317 is <1.1 × 10-13 s s-1, which, together with the long period P = 11.5587126(4) s, indicates a dipolar…
Multiwavelength Observations of the Candidate Disintegrating Sub-Mercury KIC 12557548b
Fortney, Jonathan J.; Howard, Andrew W.; Crepp, Justin R. +11 more
We present multiwavelength photometry, high angular resolution imaging, and radial velocities of the unique and confounding disintegrating low-mass planet candidate KIC 12557548b. Our high angular resolution imaging, which includes space-based Hubble Space Telescope Wide Field Camera 3 (HST/WFC3) observations in the optical (~0.53 µm and ~0.…
Searching for Diffuse Light in the M96 Galaxy Group
Mihos, J. Christopher; Harding, Paul; Feldmeier, John J. +1 more
We present deep, wide-field imaging of the M96 galaxy group (also known as the Leo I Group). Down to surface brightness limits of µ B = 30.1 and µ V = 29.5, we find no diffuse, large-scale optical counterpart to the "Leo Ring," an extended H I ring surrounding the central elliptical M105 (NGC 3379). However, we …