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The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. VIII. Preliminary Public Catalog Release
Anderson, J.; Cool, A. M.; Milone, A. P. +14 more
The Hubble Space Telescope (HST) UV Legacy Survey of Galactic Globular Clusters (GO-13297) has been specifically designed to complement the existing F606W and F814W observations of the Advanced Camera for Surveys (ACS) Globular Cluster Survey (GO-10775) by observing the most accessible 47 of the previous survey’s 65 clusters in three WFC3/UVIS fil…
The KMOS Cluster Survey (KCS). I. The Fundamental Plane and the Formation Ages of Cluster Galaxies at Redshift 1.4 < z < 1.6
Bender, Ralf; Mendel, J. Trevor; Cappellari, Michele +13 more
We present the analysis of the fundamental plane (FP) for a sample of 19 massive red-sequence galaxies (M\star > 4× 1010 M⊙) in three known overdensities at 1.39< z< 1.61 from the K-band Multi-object Spectrograph (KMOS) Cluster Survey, a guaranteed-time program with spectroscopy from the KMOS at the VLT an…
H I, CO, and Dust in the Perseus Cloud
Tachihara, Kengo; Fukui, Yasuo; Hayashi, Katsuhiro +3 more
Comparison analyses between the gas emission data ({{H}} {{I}} 21 {cm} line and {CO} 2.6 {mm} line) and the Planck/IRAS dust emission data (optical depth at 353 {GHz} {τ }353 and dust temperature {T}{{d}}) allow us to estimate the amount and distribution of the hydrogen gas more accurately, and our previous studies revealed t…
Constraints on direction-dependent cosmic birefringence from Planck polarization data
Scott, Douglas; Contreras, Dagoberto; Boubel, Paula
Cosmic birefringence is the process that rotates the plane of polarization by an amount, α, as photons propagate through free space. Such an effect arises in parity-violating extensions to the electromagnetic sector, such as the Chern-Simons term common in axion models, quintessence models, or Lorentz-violating extensions to the standard model. Mo…
Rotating Stars from Kepler Observed with Gaia DR1
Davenport, James R. A.
Astrometric data from the recent Gaia Data Release 1 have been matched against the sample of stars from Kepler with known rotation periods. A total of 1299 bright rotating stars were recovered from the subset of Gaia sources with good astrometric solutions, most with temperatures above 5000 K. From these sources, 894 were selected as lying near th…
Survey of Water and Ammonia in Nearby Galaxies (SWAN): Resolved Ammonia Thermometry, and Water and Methanol Masers in the Nuclear Starburst of NGC 253
Meier, David S.; Ott, Jürgen; Schinnerer, Eva +3 more
We present Karl G. Jansky Very Large Array molecular line observations of the nearby starburst galaxy NGC 253, from SWAN, the Survey of Water and Ammonia in Nearby galaxies. SWAN is a molecular line survey at centimeter wavelengths designed to reveal the physical conditions of star-forming gas over a range of star-forming galaxies. NGC 253 has bee…
MOVES - I. The evolving magnetic field of the planet-hosting star HD189733
Moutou, C.; Vidotto, A. A.; Ehrenreich, D. +9 more
HD189733 is an active K dwarf that is, with its transiting hot Jupiter, among the most studied exoplanetary systems. In this first paper of the Multiwavelength Observations of an eVaporating Exoplanet and its Star (MOVES) programme, we present a 2-yr monitoring of the large-scale magnetic field of HD189733. The magnetic maps are reconstructed for …
HST/COS Observations of Ionized Gas Accretion at the Disk-Halo Interface of M33
Peek, J. E. G.; Zheng, Y.; Putman, M. E. +1 more
We report the detection of accreting ionized gas at the disk-halo interface of the nearby galaxy M33. We analyze Hubble Space Telescope/Cosmic Origins Spectrograph absorption-line spectra of seven ultraviolet-bright stars evenly distributed across the disk of M33. We find Si IV absorption components consistently redshifted relative to the bulk M33…
The Outer Halo of the Milky Way as Probed by RR Lyr Variables from the Palomar Transient Facility
Kulkarni, Shrinivas R.; Laher, Russ R.; Prince, Thomas A. +5 more
RR Lyrae stars are ideal massless tracers that can be used to study the total mass and dark matter content of the outer halo of the Milky Way (MW). This is because they are easy to find in the light-curve databases of large stellar surveys and their distances can be determined with only knowledge of the light curve. We present here a sample of 112…
The Sleeping Monster: NuSTAR Observations of SGR 1806-20, 11 Years After the Giant Flare
Göğüş, Ersin; Kouveliotou, Chryssa; Younes, George +5 more
We report the analysis of five Nuclear Spectroscopic Telescope Array (NuSTAR) observations of SGR 1806-20 spread over a year from 2015 April to 2016 April, more than 11 years following its giant flare (GF) of 2004. The source spin frequency during the NuSTAR observations follows a linear trend with a frequency derivative \dot{ν }=(-1.25+/- 0.03)× …