Results 21 to 30 of about 30,329 (257)

Guanaco colonisation of Tierra del Fuego Island from mainland Patagonia: Walked, swam, or by canoe?

Geo: Geography and Environment, Volume 9, Issue 2, July‐December 2022., 2022
A geographical and biological puzzle that has perplexed scientists since the late 1800s working in southern South America: why are there so few vertebrates on the island of Tierra del Fuego compared to the adjacent Patagonia mainland, including the absence of the ubiquitous Guanaco (Lama guanicoe), wild camelid of the south? An interdisciplinary search
William L. Franklin
wiley   +1 more source

GASS High Velocity Clouds in the Region of the Magellanic Leading Arm [PDF]

, 2012
We present a catalog of high-velocity clouds in the region of the Magellanic Leading Arm. The catalog is based on neutral hydrogen (\HI) observations from the Parkes Galactic All-Sky Survey (GASS).
Begum, Benjamin, Besla, Bi-Qing For, Blaauw, Blitz, Braun, Brüns, Diaz, Fox, Gibson, Heitsch, Kallivayalil, Kallivayalil, Lister Staveley-Smith, Lu, McClure-Griffiths, McClure-Griffiths, Muller, N. M. McClure-Griffiths, Nidever, Nidever, Oort, Putman, Putman, Quilis, Reid, Sembach, Stanimirović, Starck, Wakker, Wakker   +31 more
core   +1 more source

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

Comparison of Rutherford's atomic model with the Standard Model of particle physics and other models

Journal of the Royal Society of New Zealand, Volume 51, Issue 3-4, Page 538-556, September ‐ December 2021., 2021
ABSTRACT Ernest Rutherford is known almost universally as the discoverer of the structure of the atom. He is less well known for his discovery of the proton. Even less well known is a set of hypotheses on the structure of matter that was proposed by Newton 300 years ago.
Philip Yock
wiley   +1 more source

The high-velocity clouds and the Magellanic Clouds [PDF]

, 2004
From an analysis of the sky and velocity distributions of the high-velocity clouds (HVCs) we show that the majority of the HVCs has a common origin. We conclude that the HVCs surround the Galaxy, forming a metacloud of 300 kpc in size and with a mass of ...
Alfaro, Alves, Bajaja, Bajaja, Barry, Blitz, Braun, Bregman, C. A. Olano, Cabrera-Caño, Comerón, de Heij, de Heij, Espresate, Franco, García-Ruiz, Gardiner, Gardiner, Giovanelli, Giovanelli, Grebel, Hardy, Heckman, Heiles, Heiles, Heller, Houck, Hulsbosch, Hulsbosch, Ibata, Jiménez-Vicente, Kahn, Kazès, Kerr, Kroupa, Lehner, Lin, Lockman, López-Corredoira, Maloney, McClure-Griffiths, Merritt, Miller, Mirabel, Mirabel, Moore, Morras, Murai, Olano, Olano, Olano, Oort, Oort, Oort, Palous, Putman, Putman, Putman, Pöppel, Quilis, Richter, Saha, Scalo, Schulman, Sembach, Sembach, Sembach, Stanimirovic, Sternberg, Tenorio-Tagle, Tenorio-Tagle, Tenorio-Tagle, Tripp, Tufte, Verschuur, Wakker, Wakker, Westerlund, Wouterloot, Yoshizawa   +79 more
core   +2 more sources

Identification of the OGLE Blazars behind the Large and Small Magellanic Clouds

Galaxies, 2017
We report the selection of blazar candidates behind the Large and Small Magellanic Clouds. Both flat spectrum radio quasar and BL Lacreate objects were selected based on the long-term, multi-colour Optical Gravitational Lensing Experiment photometric ...
Natalia Żywucka, Arti Goyal, Marek Jamrozy, Łukasz Stawarz, Michał Ostrowski, Szymon Kozłowski, Andrzej Udalski   +6 more
doaj   +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 STUDY OF GALACTIC BEAT CEPHEIDS WITH APPLICATION OF ITS RESULTS TO THOSE IN THE MAGELLANIC CLOUDS

Odessa Astronomical Publications, 2014
A thorough study of the correlation between P1=P0 ratio, fundamental period, and chemical composition (abundances of metals that compose Z) was conducted to investigate the significance of the iron-peak elements on the ratio. The results suggested a more
F. A. Chekhonadskikh, V. V. Kovtyukh, S. I. Belik   +2 more
doaj   +1 more source

THE ABUNDANCES OF THE ELEMENTS OF THE MAGELLANIC CLOUDS

Odessa Astronomical Publications, 2010
The results of the spectroscopic researches of classical Chepheids of the Magellanic Clouds (MC) are presented in this paper. 21 spec tra for the Large Magellanic Cloud (LMC) and 10 for the Small Magellanic Cloud (SMC) were investigated.
F. A. Chekhonadskikh
doaj   +1 more source