Florent Mertens, M. Mevius, L. V. E. Koopmans, A. R. Offringa et al.
ABSTRACT A new upper limit on the 21 cm signal power spectrum at a redshift of z ≈ 9.1 is presented, based on 141 h of data obtained with the Low-Frequency Array (LOFAR). The analysis includes significant improvements in spectrally smooth gain-calibration, Gaussian Process Regression (GPR) foregroun...
D. Lynden–Bell
We show that accretion disks with magnetic fields in them ought to make jets provided that their electrical conductivity prevents slippage and there is an ambient pressure in their surroundings. We study equilibria of highly wound magnetic structures. General Energy theorems demonstrate that they fo...
C. Hellier, D. R. Anderson, A. Collier Cameron, A. P. Doyle et al.
We present seven new transiting hot Jupiters from the WASP-South survey. The planets are all typical hot Jupiters orbiting stars from F4 to K0 with magnitudes of V = 10.3-12.5. The orbital periods are all in the range of 3.9-4.6 d, the planetary masses range from 0.4 to 2.3 M Jup and the radii from ...
Ian Heywood, I. Rammala, F. Camilo, W. D. Cotton et al.
Abstract The inner ∼200 pc region of the Galaxy contains a 4 million M ⊙ supermassive black hole (SMBH), significant quantities of molecular gas, and star formation and cosmic-ray energy densities that are roughly two orders of magnitude higher than the corresponding levels in the Galactic disk. At ...
Theresa Wiegert, Judith Irwin, A. Miskolczi, Philip Schmidt et al.
Author: Wiegert, T. et al.; Genre: Journal Article; Issued: 2015-09; Keywords: galaxies: magnetic fields, galaxies: star formation, ISM: magnetic fields, radio continuum: galaxies; Title: CHANG-ES. IV. Radio Continuum Emission of 35 Edge-on Galaxies Observed with the Karl G. Jansky Very Large Array ...
Francesco D’Eugenio, Alex J. Cameron, Jan Scholtz, Stefano Carniani et al.
Abstract We present the third data release of the JWST Advanced Deep Extragalactic Survey (JADES), providing both imaging and spectroscopy in the two GOODS fields. Spectroscopy consists of medium-depth and deep NIRSpec/microshutter assembly spectra of 4000 targets, covering the spectral range 0.6–5....
Rachel Bezanson, Ivo Labbé, Katherine E. Whitaker, Joel Leja et al.
Abstract In this paper we describe the survey design for the Ultradeep NIRSpec and NIRCam Observations before the Epoch of Reionization (UNCOVER) Cycle 1 JWST Treasury program, which executed its early imaging component in 2022 November. The UNCOVER survey includes ultradeep (∼29–30AB) imaging of ∼4...
M. Nicholl, S. J. Smartt, A. Jerkstrand, S. A. Sim et al.
Americanae nace como un proyecto conjunto que surge dentro de la Red Europea de Información y Documentación sobre América Latina (REDIAL), y que ha afrontado la Biblioteca de la Agencia Española de Cooperación Internacional para el Desarrollo (AECID). Esta nueva biblioteca virtual hace más accesible...
C. D. Wilson, B. E. Warren, F. P. Israel, S. Serjeant et al.
We present large-area maps of the CO <i>J</i> = 3-2 emission obtained at the James Clerk Maxwell Telescope for four spiral galaxies in the Virgo Cluster. We combine these data with published CO <i>J</i> = 1-0, 24 μm, and Hα images to measure the CO line ratios, molecular gas ...
Judith Irwin, Rainer Beck, R. A. Benjamin, Ralf-Jürgen Dettmar et al.
We introduce a new survey to map the radio continuum halos of a sample of 35 edge-on spiral galaxies at 1.5 GHz and 6 GHz in all polarization products. The survey is exploiting the new wide bandwidth capabilities of the Karl G. Jansky Very Large Array (i.e., the Expanded Very Large Array) in a varie...
Raghunath Ghara, Sambit K. Giri, Garrelt Mellema, B. Ciardi et al.
ABSTRACT We derive constraints on the thermal and ionization states of the intergalactic medium (IGM) at redshift ≈ 9.1 using new upper limits on the 21-cm power spectrum measured by the LOFAR radio telescope and a prior on the ionized fraction at that redshift estimated from recent cosmic microwave...
P. Murugavel, S. D. Pawar, V. Gopalakrishan
ABSTRACT The spatial distribution of convective available potential energy ( CAPE ) and lightning activity in different seasons over the Indian region have been studied to find out the dependence of lightning activity on CAPE . It is observed that the lightning activity over the Indian region is not...
C. Inserra, S. J. Smartt, Erwin Gáll, G. Leloudas et al.
We present two hydrogen-rich superluminous supernovae (SLSNe): SN2103hx and PS15br. These objects, together with SN2008es, are the only SLSNe showing a distinct, broad H α feature during the photospheric phase; also, they show no sign of strong interaction between fast moving ejecta and circumstella...
M. Fraser, M. Magee, R. Kotak, S. J. Smartt et al.
Using imaging from the Pan-STARRS1 survey, we identify a precursor outburst at 287 and 170 days prior to the reported explosion of the purported Type IIn supernova (SN) 2011ht. In the Pan-STARRS data, a source coincident with SN 2011ht is detected exclusively in the z P1 and y P1 -bands. An absolute...
J. N. Islam
This book provides a concise introduction to the mathematical aspects of the origin, structure and evolution of the universe. The book begins with a brief overview of observational and theoretical cosmology, along with a short introduction to general relativity. It then goes on to discuss Friedmann ...