Search Publications
The Dust Attenuation Curve versus Stellar Mass for Emission Line Galaxies at z ~ 2
Trump, Jonathan R.; Schneider, Donald P.; Bridge, Joanna +8 more
We derive the mean wavelength dependence of stellar attenuation in a sample of 239 high redshift (1.90\lt z\lt 2.35) galaxies selected via Hubble Space Telescope WFC3 IR grism observations of their rest-frame optical emission lines. Our analysis indicates that the average reddening law follows a form similar to that derived by Calzetti et al. for …
Large-scale Contraction and Subsequent Disruption of Coronal Loops During Various Phases of the M6.2 Flare Associated with the Confined Flux Rope Eruption
Kushwaha, Upendra; Joshi, Bhuwan; Veronig, Astrid M. +1 more
We investigate evolutionary phases of an M6.2 flare and the associated confined eruption of a prominence. The pre-flare phase exhibits spectacular large-scale contraction of overlying extreme ultraviolet (EUV) coronal loops during which the loop system was subjected to an altitude decrease of ∼20 Mm (40% of the initial height) for an extended span…
High-lying OH Absorption, [C II] Deficits, and Extreme L FIR/M H2 Ratios in Galaxies
Lutz, D.; Genzel, R.; Poglitsch, A. +22 more
Herschel/PACS observations of 29 local (ultra)luminous infrared galaxies, including both starburst and active galactic nucleus (AGN) dominated sources as diagnosed in the mid-infrared/optical, show that the equivalent width of the absorbing OH 65 µm Π3/2 J = 9/2-7/2 line (W eq(OH65)) with lower level energy E low
Driving Solar Spicules and Jets with Magnetohydrodynamic Turbulence: Testing a Persistent Idea
Cranmer, Steven R.; Woolsey, Lauren N.
The solar chromosphere contains thin, highly dynamic strands of plasma known as spicules. Recently, it has been suggested that the smallest and fastest (Type II) spicules are identical to intermittent jets observed by the Interface Region Imaging Spectrograph. These jets appear to expand out along open magnetic field lines rooted in unipolar netwo…
Chemical Analysis of Asymptotic Giant Branch Stars in M62
Dalessandro, E.; Massari, D.; Mucciarelli, A. +4 more
We have collected UVES-FLAMES high-resolution spectra for a sample of 6 asymptotic giant branch (AGB) and 13 red giant branch (RGB) stars in the Galactic globular cluster (GC) M62 (NGC 6266). Here we present the detailed abundance analysis of iron, titanium, and light elements (O, Na, Mg, and Al). For the majority (five out of six) of the AGB targ…
First Results from the VIRIAL Survey: The Stellar Content of UVJ-selected Quiescent Galaxies at 1.5 < z < 2 from KMOS
van Dokkum, Pieter G.; Bender, Ralf; Mendel, J. Trevor +14 more
We investigate the stellar populations of 25 massive galaxies (log [{{M}*}/{{M}⊙ }]≥slant 10.9) at 1.5\lt z\lt 2 using data obtained with the K-band Multi-Object Spectrograph (KMOS) on the ESO VLT. Targets were selected to be quiescent based on their broadband colors and redshifts using data from the 3D-HST grism survey. The …
The Innermost Mass Distribution of the Gravitational Lens SDP.81 from ALMA Observations
Matsushita, Satoki; Wong, Kenneth C.; Suyu, Sherry H.
The central image of a strongly lensed background source places constraints on the foreground lens galaxy’s inner mass profile slope, core radius, and mass of its nuclear supermassive black hole. Using high-resolution long-baseline Atacama Large Millimeter/submillimeter Array (ALMA) observations and archival Hubble Space Telescope (HST) imaging, w…
Hubble Space Telescope Observations of the NUV Transit of WASP-12b
Goad, M.; Nichols, J. D.; Clarke, J. T. +6 more
We present new observations of four closely spaced near-ultraviolet (NUV) transits of the hot Jupiter-like exoplanet WASP-12b using Hubble Space Telescope (HST)/Cosmic Origins Spectrograph (COS), significantly increasing the phase resolution of the observed NUV light curve relative to previous observations, while minimizing the temporal variation …
Hubble Space Telescope Near-Ultraviolet Spectroscopy of Bright CEMP-s Stars
Smith, Verne V.; Beers, Timothy C.; Placco, Vinicius M. +14 more
We present an elemental-abundance analysis, in the near-ultraviolet (NUV) spectral range, for the bright carbon-enhanced metal-poor (CEMP) stars HD 196944 (V=8.40, [Fe/H] = -2.41) and HD 201626 (V=8.16, [Fe/H] = -1.51), based on data acquired with the Space Telescope Imaging Spectrograph (STIS) on the Hubble Space Telescope. Both of these stars be…
Modeling of Reflective Propagating Slow-mode Wave in a Flaring Loop
Fang, X.; Xia, C.; Van Doorsselaere, T. +2 more
Quasi-periodic propagating intensity disturbances have been observed in large coronal loops in extreme ultraviolet images over a decade, and are widely accepted to be slow magnetosonic waves. However, spectroscopic observations from Hinode/EIS revealed their association with persistent coronal upflows, making this interpretation debatable. We perf…