Search Publications
A blind CO detection of a distant red galaxy in the HS1700+64 protocluster.
Smail, I.; Ivison, R. J.; Gurwell, M. +7 more
We report the blind detection of 12CO emission from a distant red galaxy, HS1700.DRG55. We have used the IRAM Plateau de Bure Interferometer WideX, with its 3.6 GHz of instantaneous dual-polarization bandwidth, to target 12CO(3-2) from galaxies lying in the protocluster at z = 2.300 in the field HS1700+64. If indeed this line…
A divergence-free parametrization for dynamical dark energy
Akarsu, Özgür; Dereli, Tekin; Vazquez, J. Alberto
We introduce a new parametrization for the dark energy, led by the same idea to the linear expansion of the equation of state in scale factor a and in redshift z, which diverges neither in the past nor future and contains the same number of degrees of freedom with the former two. We present constraints of the cosmological parameters using the most…
Co-evolution of black hole growth and star formation from a cross-correlation analysis between quasars and the cosmic infrared background
Ross, Nicholas P.; Wang, Wenting; Han, Jiaxin +19 more
We present the first cross-correlation measurement between Sloan Digital Sky Survey type 1 quasars and the cosmic infrared background (CIB) measured by Herschel. The quasars cover the redshift range 0.15 < z < 3.5 where most of the CIB originates. We detect the sub-millimetre emission of the quasars, which dominates on small scales, and corr…
HH 666: different kinematics from H α and [Fe II] emission provide a missing link between jets and outflows
Smith, Nathan; Bally, John; Reiter, Megan +1 more
HH 666 is an externally irradiated protostellar outflow in the Carina nebula for which we present new near-IR [Fe II] spectra obtained with the Folded-Port Infrared Echellette spectrograph at Magellan Observatory. Earlier H α and near-IR [Fe II] imaging revealed that the two emission lines trace substantially different morphologies in the inner ∼4…
On the Enhanced Coronal Mass Ejection Detection Rate since the Solar Cycle 23 Polar Field Reversal
Petrie, G. J. D.
Compared to cycle 23, coronal mass ejections (CMEs) with angular widths >30° have been observed to occur at a higher rate during solar cycle 24, per sunspot number. This result is supported by data from three independent databases constructed using Large Angle and Spectrometric Coronagraph Experiment coronagraph images, two employing automated …
Smoke in the Pipe Nebula: dust emission and grain growth in the starless core FeSt 1-457
Alves, João; Forbrich, Jan; Lada, Charles J. +2 more
Context. The availability of submillimeter dust emission data in an unprecedented number of bands provides us with new opportunities to investigate the properties of interstellar dust in nearby clouds.
Aims: The nearby Pipe Nebula is an ideal laboratory to study starless cores. We here aim to characterize the dust properties of the FeSt 1-457…
XMMFITCAT: The XMM-Newton spectral-fit database
Georgantopoulos, I.; Watson, M. G.; Webb, N. A. +3 more
The XMM-Newton spectral-fit database (XMMFITCAT) is a catalogue of spectral fitting results for the source detections within the XMM-Newton serendipitous source catalogue with more than 50 net (background-subtracted) counts per detector in the 0.5-10 keV energy band. Its most recent version, constructed from the latest version of the XMM-Newton ca…
Missing hard states and regular outbursts: the puzzling case of the black hole candidate 4U 1630-472
Capitanio, F.; Ferrigno, C.; Campana, R. +1 more
4U 1630-472 is a recurrent X-ray transient classified as a black hole candidate from its spectral and timing properties. One of the peculiarities of this source is the presence of regular outbursts with a recurrence period between 600 and 730 d that has been observed since the discovery of the source in 1969. We report on a comparative study of th…
Dipole tilt angle effect on magnetic reconnection locations on the magnetopause
Zhang, H.; Wan, W. X.; Pu, Z. Y. +7 more
Plasma energy dispersion properties inside reconnection jet flows observed inside the low-latitude boundary layer are used to determine the distances of observing satellites to reconnection sites. The locations of the reconnection sites are then retrieved by tracing the modeled field lines by those distances. The controlling effects of the dipole …
The star formation rate cookbook at 1 < z < 3: Extinction-corrected relations for UV and [OII]λ3727 luminosities
Cimatti, A.; Daddi, E.; Pozzi, F. +7 more
Aims: In this paper we use a well-controlled spectroscopic sample of galaxies at 1 <z< 3 drawn from the Galaxy Mass Assembly ultra-deep Spectroscopic Survey (GMASS) to study different star formation rate (SFR) estimators. In particular, we use infrared (IR) data to derive empirical calibrations to correct ultraviolet (UV) and [OII]λ3727…