Search Publications
ALMA Resolves the Molecular Gas in a Young Low-metallicity Starburst Galaxy at z = 1.7
Gladders, M. D.; Barrientos, L. Felipe; Sharon, Keren +6 more
We present Atacama Large Millimeter/submillimeter Array observations of CO lines and dust continuum emission of the source RCSGA 032727-132609, a young z = 1.7 low-metallicity starburst galaxy. The CO(3-2) and CO(6-5) lines and continuum at rest-frame 450 µm are detected and show a resolved structure in the image plane. We use the correspond…
Towards understanding the Planck thermal dust models
Liu, Hao; Naselsky, Pavel; von Hausegger, Sebastian
Understanding the properties of dust emission in the microwave domain is an important premise for the next generation of cosmic microwave background (CMB) experiments, devoted to the measurement of the primordial B -modes of polarization. In this paper, we compare three solutions to thermal dust emission by the Planck Collaboration [A. Abergel, P.…
CME Velocity and Acceleration Error Estimates Using the Bootstrap Method
Gopalswamy, Nat; Yashiro, Seiji; Michalek, Grzegorz
The bootstrap method is used to determine errors of basic attributes of coronal mass ejections (CMEs) visually identified in images obtained by the Solar and Heliospheric Observatory (SOHO) mission's Large Angle and Spectrometric Coronagraph (LASCO) instruments. The basic parameters of CMEs are stored, among others, in a database known as the SOHO…
Seasonal effect for polar cap sunward plasma flows at strongly northward IMF Bz
Koustov, A. V.; Yakymenko, K. N.; Ponomarenko, P. V.
We use Super Dual Auroral Radar Network data to study polar cap ionospheric flow under strongly dominant positive interplanetary magnetic field Bz component. We show that the near-noon flow along the magnetic meridian is predominantly sunward in summer. The sunward velocity increase with intensification of the external driver (the rever…
Gemini Spectra of Star Clusters in the Spiral Galaxy M101
Whitmore, Bradley C.; Chandar, Rupali; Simanton-Coogan, Lesley A. +1 more
We present low resolution, visible light spectra of 41 star clusters in the spiral galaxy M101, taken with the Gemini/GMOS instrument. We measure Lick indices for each cluster and compare with BaSTI models to estimate their ages and metallicities. We also measure the line-of-sight velocities. We find that 25 of the clusters are fairly young massiv…
C II Radiative Cooling of the Galatic Diffuse Interstellar Medium: Insight into the Star Formation in Damped Lyα Systems
Menten, Karl M.; Mathur, Smita; Wolfe, Arthur M. +3 more
The far-infrared [C II] 158 µm fine structure transition is considered to be a dominant coolant in the interstellar medium (ISM). For this reason, under the assumption of a thermal steady state, it may be used to infer the heating rate and, in turn, the star formation rate (SFR) in local as well as in high redshift systems. In this work, rad…
Two test-cases for synergistic detections in the Martian atmosphere: Carbon monoxide and methane
Vandaele, A. C.; Daerden, F.; Robert, S. +5 more
In the frame of the scientific preparation of ExoMars Trace Gas Orbiter (EMTGO), synergistic retrievals were performed on synthetic spectra of two different remote sensing instruments of the Martian atmosphere. To benefit from their diversity, we have simulated spectra of a Fourier transform spectrometer (FTS), working in the middle to far infrare…
Follow-up of eROSITA and Euclid Galaxy Clusters with XMM-Newton
Reiprich, T. H.
A revolution in galaxy cluster science is only a few years away. The survey machines eROSITA and Euclid will provide cluster samples of statistical quality never seen before. XMM-Newton will be the key instrument to exploit these rich datasets in terms of detailed follow-up of the cluster hot gas content, systematically characterizing subsamples a…
The XMM deep survey in the CDF-S. X. X-ray variability of bright sources
Vignali, C.; Gilli, R.; Ranalli, P. +6 more
Aims: We aim to study the variability properties of bright hard X-ray selected active galactic nuclei (AGN) in the redshift range between 0.3 and 1.6 detected in the Chandra Deep Field South (XMM-CDFS) by a long ( 3 Ms) XMM observation.
Methods: Taking advantage of the good count statistics in the XMM CDFS, we search for flux and spectra…
Contribution of Field Strength Gradients to the Net Vertical Current of Active Regions
Vemareddy, P.
We examined the contribution of field strength gradients for the degree of net vertical current (NVC) neutralization in active regions (ARs). We used photospheric vector magnetic field observations of AR 11158 obtained by Helioseismic and Magnetic Imager on board SDO and Hinode. The vertical component of the electric current is decomposed into twi…