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Similarity of the Jovian satellite footprints: Spots multiplicity and dynamics
Saur, J.; Badman, S. V.; Bonfond, B. +3 more
In the magnetospheres of Jupiter and Saturn, the intense interaction of the satellites Io, Europa, Ganymede and Enceladus with their surrounding plasma environment leaves a signature in the aurora of the planet. Called satellite footprints, these auroral features appear either as a single spot (Europa and Enceladus) or as multiple spots (Io and Ga…
Weighing in on the masses of retired A stars with asteroseismology: K2 observations of the exoplanet-host star HD 212771
Vanderburg, Andrew; Chaplin, William J.; Davies, Guy R. +12 more
Doppler-based planet surveys point to an increasing occurrence rate of giant planets with stellar mass. Such surveys rely on evolved stars for a sample of intermediate-mass stars (so-called retired A stars), which are more amenable to Doppler observations than their main-sequence progenitors. However, it has been hypothesized that the masses of su…
Warm and cold molecular gas conditions modelled in 87 galaxies observed by the Herschel SPIRE Fourier transform spectrometer
Glenn, J.; Kamenetzky, J.; Rangwala, N.
We have conducted two-component, non-local thermodynamic equilibrium modelling of the CO lines from J = 1-0 through J = 13-12 in 87 galaxies observed by the Herschel SPIRE Fourier Transform Spectrometer (FTS). We find the average pressure of the cold molecular gas, traced especially by CO J = 1-0, is ∼105.0±0.5 K cm-3. The mi…
Spectral Resolution-linked Bias in Transit Spectroscopy of Extrasolar Planets
Deming, Drake; Sheppard, Kyle
We re-visit the principles of transmission spectroscopy for transiting extrasolar planets, focusing on the overlap between the planetary spectrum and the illuminating stellar spectrum. Virtually all current models of exoplanetary transmission spectra utilize an approximation that is inaccurate when the spectrum of the illuminating star has a compl…
Tensor Minkowski Functionals: first application to the CMB
Ganesan, Vidhya; Chingangbam, Pravabati
Tensor Minkowski Functionals (TMFs) are tensor generalizations of the usual Minkowski Functionals which are scalar quantities. We introduce them here for use in cosmological analysis, in particular to analyze the Cosmic Microwave Background (CMB) radiation. They encapsulate information about the shapes of structures and the orientation of distribu…
Supernova remnants in M33: X-ray properties as observed by XMM-Newton
Williams, Benjamin F.; Blair, William P.; Haberl, Frank +8 more
We have carried out a study of the X-ray properties of the supernova remnant (SNR) population in M33 with XMM-Newton, comprising deep observations of eight fields in M33 covering all of the area within the D25 contours, and with a typical luminosity of 7.1 × 1034 erg s-1 (0.2-2.0 keV). Here, we report our work to c…
HIFLUGCS: X-ray luminosity-dynamical mass relation and its implications for mass calibrations with the SPIDERS and 4MOST surveys
Reiprich, Thomas H.; Schwope, Axel; Schneider, Peter +7 more
We present the relation of X-ray luminosity versus dynamical mass for 63 nearby clusters of galaxies in a flux-limited sample, the HIghest X-ray FLUx Galaxy Cluster Sample (HIFLUGCS, consisting of 64 clusters). The luminosity measurements are obtained based on 1.3 Ms of clean XMM-Newton data and ROSAT pointed observations. The masses are estimated…
ESO 452-SC11: the lowest mass globular cluster with a potential chemical inhomogeneity
Martell, Sarah L.; Simpson, Jeffrey D.; Zucker, Daniel B. +2 more
We present the largest spectroscopic investigation of one of the faintest and least studied stellar clusters of the Milky Way, ESO 452-SC11. Using the Anglo-Australian Telescope AAOmega and Keck High Resolution Echelle Spectrometer spectrographs we have identified 11 members of the cluster and found indications of star-to-star light element abunda…
Dark matter distribution in X-ray luminous galaxy clusters with Emergent Gravity
Pointecouteau, E.; Eckert, D.; Ettori, S. +2 more
We present the radial distribution of the dark matter in two massive, X-ray luminous galaxy clusters, Abell 2142 and Abell 2319, and compare it with the quantity predicted as apparent manifestation of the baryonic mass in the context of the 'Emergent Gravity' scenario, recently suggested from Verlinde. Thanks to the observational strategy of the X…
A star formation study of the ATLAS3D early-type galaxies with the AKARI all-sky survey
Kaneda, H.; Murata, K.; Yamagishi, M. +4 more
Context. The star formation properties of early-type galaxies (ETGs) are currently the subject of considerable interest, particularly whether they differ from the star formation properties of gas-rich spirals.
Aims: We perform a systematic study of star formation in a large sample of local ETGs with polycyclic aromatic hydrocarbon (PAH) and d…