Search Publications
The Peculiar Behavior of Halo Coronal Mass Ejections in Solar Cycle 24
Gopalswamy, N.; Michalek, G.; Yashiro, S. +3 more
We report on the remarkable finding that the halo coronal mass ejections (CMEs) in cycle 24 are more abundant than in cycle 23, although the sunspot number in cycle 24 has dropped by ∼40%. We also find that the distribution of halo-CME source locations is different in cycle 24: the longitude distribution of halos is much flatter with the number of…
MUSE integral-field spectroscopy towards the Frontier Fields cluster Abell S1063. I. Data products and redshift identifications
Grillo, C.; Balestra, I.; Rosati, P. +11 more
We present the first observations of the Frontier Fields cluster Abell S1063 taken with the newly commissioned Multi Unit Spectroscopic Explorer (MUSE) integral field spectrograph. Because of the relatively large field of view (1 arcmin2), MUSE is ideal to simultaneously target multiple galaxies in blank and cluster fields over the full…
Fifteen years of XMM-Newton and Chandra monitoring of Sgr A★: evidence for a recent increase in the bright flaring rate
Nandra, K.; Merloni, A.; Degenaar, N. +13 more
We present a study of the X-ray flaring activity of Sgr A⋆ during all the 150 XMM-Newton and Chandra observations pointed at the Milky Way centre over the last 15 years. This includes the latest XMM-Newton and Chandra campaigns devoted to monitoring the closest approach of the very red Brγ emitting object called G2. The entire data set …
The orbits and masses of satellites of Pluto
Showalter, Mark R.; Buie, Marc W.; Jacobson, Robert A. +1 more
We present the numerically integrated orbits of Pluto's satellites. The orbits have been fit to a data set that includes Earth-based and Hubble Space Telescope (HST) astrometry of Charon, Nix, Hydra, Kerberos, and Styx, as well as the lightcurves from the Pluto-Charon mutual events. We also report new, 2010-2012 HST astrometry of all satellites in…
Geometrical Relationship Between Interplanetary Flux Ropes and Their Solar Sources
Marubashi, K.; Cho, K. -S.; Gopalswamy, N. +3 more
We investigated the physical connection between interplanetary flux ropes (IFRs) near Earth and coronal mass ejections (CMEs) by comparing the magnetic field structures of IFRs and CME source regions. The analysis is based on the list of 54 pairs of ICMEs (interplanetary coronal mass ejections) and CMEs that are taken to be the most probable solar…
GHIGLS: H I Mapping at Intermediate Galactic Latitude Using the Green Bank Telescope
Miville-Deschênes, M. -A.; Martin, P. G.; Blagrave, K. P. M. +5 more
This paper introduces and describes the data cubes from GHIGLS, deep Green Bank Telescope (GBT) surveys of the 21 cm line emission of H i in 37 targeted fields at intermediate Galactic latitude. The GHIGLS fields together cover over 1000 deg2 at 9\buildrel{ \prime}\over{.} 55 spatial resolution. The H i spectra have an effective velocit…
Hubble Space Telescope Spectroscopy of Brown Dwarfs Discovered with the Wide-field Infrared Survey Explorer
Cushing, Michael C.; Kirkpatrick, J. Davy; Gelino, Christopher R. +7 more
We present a sample of brown dwarfs identified with the Wide-field Infrared Survey Explorer (WISE) for which we have obtained Hubble Space Telescope (HST) Wide Field Camera 3 (WFC3) near-infrared grism spectroscopy. The sample (22 in total) was observed with the G141 grism covering 1.10-1.70 µm, while 15 were also observed with the G102 gris…
New reaction rates for improved primordial D /H calculation and the cosmic evolution of deuterium
Petitjean, Patrick; Uzan, Jean-Philippe; Coc, Alain +4 more
Primordial or big bang nucleosynthesis (BBN) is one of the three historically strong evidences for the big bang model. Standard BBN is now a parameter-free theory, since the baryonic density of the Universe has been deduced with an unprecedented precision from observations of the anisotropies of the cosmic microwave background radiation. There is …
SINS/zC-SINF Survey of z ∼ 2 Galaxy Kinematics: Rest-frame Morphology, Structure, and Colors from Near-infrared Hubble Space Telescope Imaging
Wuyts, S.; Förster Schreiber, N. M.; Genzel, R. +14 more
We present the analysis of Hubble Space Telescope (HST) J- and H-band imaging for 29 galaxies on the star-forming main sequence at z ∼ 2, which have adaptive optics Very Large Telescope SINFONI integral field spectroscopy from our SINS/zC-SINF program. The SINFONI Hα data resolve the ongoing star formation and the ionized gas kinematics on scales …
Evidence of the Missing Baryons from the Kinematic Sunyaev-Zeldovich Effect in Planck Data
Wang, Wenting; Ma, Yin-Zhe; Herranz, Diego +4 more
We estimate the amount of the missing baryons detected by the Planck measurements of the cosmic microwave background in the direction of central galaxies (CGs) identified in the Sloan galaxy survey. The peculiar motion of the gas inside and around the CGs unveils values of the Thomson optical depth τT in the range 0.2 - 2 ×1 0-4