Results 41 to 50 of about 772,065 (298)

Polarization in the Magellanic Clouds [PDF]

Publications of the Astronomical Society of Australia, 1990
AbstractWe present preliminary results from a number of deep radio polarization surveys being made of the Magellanic Clouds at 2.3 GHz, 4.75 GHz and 8.55 GHz. Extended and linearly polarized radio emission has been found at 2.3 and 4.75 GHz from both the Large Magellanic Cloud (LMC) and the Small Magellanic Cloud (SMC).
A. J. Hunt, Richard Wielebinski, Ulrich Klein, D. Malin, R. F. Haynes, R. Wark, J. I. Harnett, U. R. Buczilowski, E. Bajaja, L. Sciacca, J. D. Murray, S. R. Wayte   +11 more
openaire   +3 more sources

Taxonomy based on limited genomic markers may underestimate species diversity of rockhopper penguins and threaten their conservation

Diversity and Distributions, Volume 27, Issue 11, Page 2277-2296, November 2021., 2021
Abstract Aim Delimiting recently diverged species is challenging. During speciation, genetic differentiation may be distributed unevenly across the genome, as different genomic regions can be subject to different selective pressures and evolutionary histories.
María José Frugone, Theresa L. Cole, María Eugenia López, Gemma Clucas, Pável Matos‐Maraví, Nicolás A. Lois, Pierre Pistorius, Francesco Bonadonna, Phil Trathan, Andrea Polanowski, Barbara Wienecke, Andrea Raya‐Rey, Klemens Pütz, Antje Steinfurth, Ke Bi, Cynthia Y. Wang‐Claypool, Jonathan M. Waters, Rauri C. K. Bowie, Elie Poulin, Juliana A. Vianna, April Blakeslee   +20 more
wiley   +1 more source

New 20-cm radio-continuum study of the small Magellanic cloud: Part I. Images [PDF]

Serbian Astronomical Journal, 2011
We present and discuss new high-sensitivity and resolution radiocontinuum images of the Small Magellanic Cloud (SMC) at λ=20 cm (ν=1.4 GHz). The new images were created by merging 20-cm radio-continuum archival data, from the Australian ...
Wong G.F., Filipović M.D., Crawford E.J., de Horta A., Galvin T., Drašković D., Payne J.L.   +6 more
doaj   +3 more sources

The luminosities of cool supergiants in the Magellanic Clouds, and the Humphreys-Davidson limit revisited [PDF]

, 2018
The empirical upper luminosity boundary Lmax of cool supergiants (SGs), often referred to as the Humphreys-Davidson limit, is thought to encode information on the general mass-loss behaviour of massive stars.
B. Davies, P. Crowther, Emma R. Beasor
semanticscholar   +1 more source

An efficient way to use MS‐CLEAN associated with Shannon's entropy

IET Image Processing, Volume 15, Issue 10, Page 2319-2331, August 2021., 2021
Abstract This article covers deconvolution methods in the context of radio astronomical images. A new formulation is proposed to deal with negative brightness, deconvoluting separately the positive and negative brightness of the sky. The positive brightness is physically possible, but negative brightness is a degradation product.
Ramon G. Campos, Evandro O. T. Salles
wiley   +1 more source

THE Onfp CLASS IN THE MAGELLANIC CLOUDS [PDF]

The Astronomical Journal, 2010
The Onfp class of rotationally broadened, hot spectra was defined some time ago in the Galaxy, where its membership to date numbers only eight. The principal defining characteristic is a broad, centrally reversed He II $ $4686 emission profile; other emission and absorption lines are also rotationally broadened. Recent surveys in the Magellanic Clouds
Nidia Morrell, Ian D. Howarth, Anthony F. J. Moffat, Anthony F. J. Moffat, Nolan R. Walborn, Nolan R. Walborn, Jacco Th. van Loon, Nicole St-Louis, Paul A. Crowther, Paul A. Crowther, Guillermo Luis Bosch, Guillermo Luis Bosch, Guillermo Luis Bosch, Rodolfo H. Barbá, Rodolfo H. Barbá, Rodolfo H. Barbá, Chris Evans, Chris Evans, Cecilia Fariña, Cecilia Fariña   +19 more
openaire   +6 more sources

Spectral Feature Extraction Using Partial and General Method

Advances in Astronomy, Volume 2021, Issue 1, 2021., 2021
With the rapid growth in astronomical spectra produced by large sky survey telescopes, traditional manual classification processes can no longer fulfill the requirements of precision and efficiency of spectral classification. There is an urgent need to employ machine learning approaches to conduct automated spectral classification tasks.
Bin Jiang, Xi Fang, Yang Liu, Xingzhu Wang, Jie Liu, Rafael Correa   +5 more
wiley   +1 more source

The Magellanic Clouds [PDF]

International Astronomical Union Colloquium, 1974
AbstractContributions to our present knowledge of the Magellanic Clouds based on observations with Schmidt telescopes are discussed.
openaire   +2 more sources

Carbon and oxygen in H II regions of the Magellanic Clouds: abundance discrepancy and chemical evolution [PDF]

, 2017
We present C and O abundances in the Magellanic Clouds derived from deep spectra of HII regions. The data have been taken with the Ultraviolet-Visual Echelle Spectrograph at the 8.2-m VLT. The sample comprises 5 HII regions in the Large Magellanic Cloud (
L. Cipriano, G. Dom'inguez-Guzm'an, C. Esteban, J. Garc'ia-Rojas, A. Mesa-Delgado, F. Bresolin, M. Rodr'iguez, S. S. Iac, Spain., Dep. Astrof'isica Ull, Inaoe, Mexico., P. Catolica, Chile., Institute for Astronomy, Usa   +15 more
semanticscholar   +1 more source

HOW COMMON ARE THE MAGELLANIC CLOUDS? [PDF]

The Astrophysical Journal, 2011
We introduce a probabilistic approach to the problem of counting dwarf satellites around host galaxies in databases with limited redshift information. This technique is used to investigate the occurrence of satellites with luminosities similar to the Magellanic Clouds around hosts with properties similar to the Milky Way in the object catalog of the ...
Brian F. Gerke, Brian F. Gerke, Lulu Liu, Lulu Liu, Peter Behroozi, Peter Behroozi, Michael T. Busha, Michael T. Busha, Michael T. Busha, Risa H. Wechsler, Risa H. Wechsler   +10 more
openaire   +4 more sources