Search Publications
On the statistics of proto-cluster candidates detected in the Planck all-sky survey
Danese, L.; Dole, H.; Montier, L. +8 more
Observational investigations of the abundance of massive precursors of local galaxy clusters ('proto-clusters') allow us to test the growth of density perturbations, to constrain cosmological parameters that control it, to test the theory of non-linear collapse and how the galaxy formation takes place in dense environments. The Planck collaboratio…
A distinct magnetic property of the inner penumbral boundary. II. Formation of a penumbra at the expense of a pore
Jurčák, J.; Bello González, N.; Schlichenmaier, R. +1 more
Context. We recently presented evidence that stable umbra-penumbra boundaries are characterised by a distinct canonical value of the vertical component of the magnetic field, Bstablever. In order to trigger the formation of a penumbra, large inclinations in the magnetic field are necessary. In sunspots, the penumbra develops …
Multicolour modelling of SN 2013dx associated with GRB 130702A★
Minaev, P. Yu.; Pozanenko, A. S.; Ehgamberdiev, Sh. A. +13 more
We present optical observations of SN 2013dx, related to the Fermi burst GRB 130702A, which occurred at red shift z = 0.145. It is the second-best sampled gamma-ray burst (GRB)/supernova (SN) after SN 1998bw. The observational light curves contain more than 280 data points in the uBgrRiz filters until 88 d after the burst, and the data were collec…
Toward Understanding the 3D Structure and Evolution of Magnetic Flux Ropes in an Extremely Long Duration Eruptive Flare
Wang, Yuming; Chintzoglou, Georgios; Liu, Rui +2 more
In this work, we analyze the initial eruptive process of an extremely long duration C7.7-class flare that occurred on 2011 June 21. The flare had a 2 hr long rise time in soft X-ray emission, which is much longer than the rise time of most solar flares, including both impulsive and gradual ones. Combining the facts that the flare occurred near the…
The rotation of planets hosting atmospheric tides: from Venus to habitable super-Earths
Mathis, S.; Laskar, J.; Correia, A. C. M. +1 more
The competition between the torques induced by solid and thermal tides drives the rotational dynamics of Venus-like planets and super-Earths orbiting in the habitable zone of low-mass stars. The resulting torque determines the possible equilibrium states of the planet's spin. Here we have computed an analytic expression for the total tidal torque …
Infrared Photometric Properties of 709 Candidate Stellar Bowshock Nebulae
Kobulnicky, Henry A.; Dixon, Don M.; Schurhammer, Danielle P. +4 more
Arcuate infrared nebulae are ubiquitous throughout the Galactic Plane and are candidates for partial shells, bubbles, or bowshocks produced by massive runaway stars. We tabulate infrared photometry for 709 such objects using images from the Spitzer Space Telescope, the Wide-field Infrared Explorer, and the Herschel Space Observatory (HSO). Of the …
Observing the metal-poor solar neighbourhood: a comparison of galactic chemical evolution predictions*†
Jordan, C.; Soubiran, C.; Korotin, S. A. +15 more
Atmospheric parameters and chemical compositions for 10 stars with metallicities in the region of -2.2 < [Fe/H] < -0.6 were precisely determined using high-resolution, high signal-to-noise, spectra. For each star, the abundances, for 14-27 elements, were derived using both local thermodynamic equilibrium (LTE) and non-LTE (NLTE) approaches. …
Redshifted X-rays from the material accreting onto TW Hydrae: Evidence of a low-latitude accretion spot
Miceli, M.; Orlando, S.; Bonito, R. +3 more
Context. High resolution spectroscopy, providing constraints on plasma motions and temperatures, is a powerful means to investigate the structure of accretion streams in classical T Tauri stars (CTTS). In particular, the accretion shock region, where the accreting material is heated to temperatures of a few million degrees as it continues its inwa…
Detection of a Substantial Molecular Gas Reservoir in a Brightest Cluster Galaxy at z = 1.7
Muzzin, Adam; Yee, H. K. C.; Cybulski, Ryan +7 more
We report the detection of CO(2-1) emission coincident with the brightest cluster galaxy (BCG) of the high-redshift galaxy cluster SpARCS1049+56, with the Redshift Search Receiver (RSR) on the Large Millimeter Telescope (LMT). We confirm a spectroscopic redshift for the gas of z = 1.7091 ± 0.0004, which is consistent with the systemic redshift of …
The Fan Region at 1.5 GHz - I. Polarized synchrotron emission extending beyond the Perseus Arm
Leahy, J. P.; Gaensler, B. M.; McClure-Griffiths, N. M. +12 more
The Fan Region is one of the dominant features in the polarized radio sky, long thought to be a local (distance ≲500 pc) synchrotron feature. We present 1.3-1.8 GHz polarized radio continuum observations of the region from the Global Magneto-Ionic Medium Survey and compare them to maps of Hα and polarized radio continuum intensity from 0.408 to 35…