Search Publications
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…
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…
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)× …
Swift Observations of SMC X-3 during Its 2016-2017 Super-Eddington Outburst
Wang, Wei; Weng, Shan-Shan; Ge, Ming-Yu +4 more
The Be X-ray pulsar SMC X-3 underwent a giant outburst from 2016 August to 2017 March, which was monitored with the Swift satellite. During the outburst, its broadband flux increased dramatically, and the unabsorbed X-ray luminosity reached an extreme value of ∼ {10}39 erg s-1 around August 24. Using the Swift/XRT data, we me…
Astrometric Evidence for a Population of Dislodged AGNs
Chambers, Kenneth C.; Magnier, Eugene A.; Rest, Armin +5 more
We investigate a sample of 2293 ICRF2 extragalactic radio-loud sources with accurate positions determined by VLBI, mostly active galactic nuclei (AGNs) and quasars, which are cross-matched with optical sources in the first Gaia release (Gaia DR1). The distribution of offsets between the VLBI sources and their optical counterparts is strongly non-G…
HIFI Spectroscopy of H2O Submillimeter Lines in Nuclei of Actively Star-forming Galaxies
Menten, K. M.; van der Werf, P.; Stutzki, J. +10 more
We present a systematic survey of multiple velocity-resolved H2O spectra using Herschel/Heterodyne Instrument for the Far Infrared (HIFI) toward nine nearby actively star-forming galaxies. The ground-state and low-excitation lines (E up ≤ 130 K) show profiles with emission and absorption blended together, while absorption-fre…