Search Publications
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…
The extended molecular envelope of the asymptotic giant branch star π1 Gruis as seen by ALMA. I. Large-scale kinematic structure and CO excitation properties
Lindqvist, M.; Höfner, S.; Wittkowski, M. +8 more
Context. The S-type asymptotic giant branch (AGB) star π1 Gru has a known companion at a separation of 2.̋7 (≈400 AU). Previous observations of the circumstellar envelope (CSE) show strong deviations from spherical symmetry. The envelope structure, including an equatorial torus and a fast bipolar outflow, is rarely seen in the AGB phase …
PHIBSS: exploring the dependence of the CO-H2 conversion factor on total mass surface density at z<1.5
Weiner, Benjamin J.; Sandstrom, Karin M.; Freundlich, Jonathan +10 more
We present an analysis of the relationship between the CO-H2 conversion factor (αCO) and total mass surface density (Σtot) in star-forming galaxies at z < 1.5. Our sample, which is drawn from the IRAM Plateau de Bure HIgh-z Blue Sequence Survey (PHIBSS) and the CO Legacy Database for GASS (COLD GASS), includes '…
Centroid vetting of transiting planet candidates from the Next Generation Transit Survey
Wheatley, Peter J.; Bayliss, Daniel; Moyano, Maximiliano +25 more
The Next Generation Transit Survey (NGTS), operating in Paranal since 2016, is a wide-field survey to detect Neptunes and super-Earths transiting bright stars, which are suitable for precise radial velocity follow-up and characterization. Thereby, its sub-mmag photometric precision and ability to identify false positives are crucial. Particularly,…
Spatially resolved CO SLED of the Luminous Merger Remnant NGC 1614 with ALMA
Aalto, Susanne; Yun, Min S.; Kaneko, Hiroyuki +13 more
We present high-resolution (1.″0) Atacama Large Millimeter/submillimeter Array (ALMA) observations of CO (1-0) and CO (2-1) rotational transitions toward the nearby IR-luminous merger NGC 1614 supplemented with ALMA archival data of CO (3-2) and CO (6-5) transitions. The CO (6-5) emission arises from the starburst ring (central 590 pc in radius), …