Results 41 to 50 of about 167,903 (283)

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

The Origin of the Large Magellanic Cloud Globular Cluster NGC 2005

The Astronomical Journal, 2023
The ancient Large Magellanic Cloud (LMC) globular cluster NGC 2005 has recently been reported to have an ex situ origin, thus, setting precedents that the LMC could have partially formed from smaller merged dwarf galaxies.
Andrés E. Piatti, Yutaka Hirai
doaj   +1 more source

Photometry of 40 Large Magellanic Cloud Cepheids [PDF]

Monthly Notices of the Royal Astronomical Society, 1999
We present V and I-c CCD photometry for 40 Large Magellanic Cloud (LMC) Cepheids at 1 to 3 epochs. This represents a significant increase in the number of LMC Cepheids with I-band data, and, as we show, is a useful addition to the sample that can be used to calibrate the period-luminosity relations in these important bands.
Tanvir, N. R., Boyle, A.
openaire   +2 more sources

THE STAR FORMATION HISTORY OF THE LARGE MAGELLANIC CLOUD [PDF]

, 2009
We present the first ever global, spatially resolved reconstruction of the star formation history (SFH) of the Large Magellanic Cloud (LMC), based on the application of our StarFISH analysis software to the multiband photometry of 20 million of its stars
J. Harris, D. Zaritsky
semanticscholar   +1 more source

Milky Way Satellite Census. II. Galaxy–Halo Connection Constraints Including the Impact of the Large Magellanic Cloud [PDF]

Astrophysical Journal, 2019
The population of Milky Way (MW) satellites contains the faintest known galaxies and thus provides essential insight into galaxy formation and dark matter microphysics.
E. Nadler, Risa Wechsler, K. Bechtol, Yao-Yuan Mao, Yao-Yuan Mao, G. Green, A. Drlica-Wagner, A. Drlica-Wagner, M. McNanna, S. Mau, A. Pace, A. Pace, J. Simon, A. Kravtsov, S. Dodelson, Tian Li, A. Riley, Mei-Yu Wang, T. Abbott, M. Aguena, S. Allam, J. Annis, S. Ávila, G. Bernstein, E. Bertin, E. Bertin, D. Brooks, D. Burke, A. Rosell, M. Kind, J. Carretero, M. Costanzi, L. Costa, J. Vicente, S. Desai, A. Evrard, B. Flaugher, P. Fosalba, J. Frieman, J. García-Bellido, E. Gaztañaga, D. Gerdes, D. Gruen, J. Gschwend, G. Gutiérrez, W. Hartley, W. Hartley, S. Hinton, K. Honscheid, E. Krause, K. Kuehn, K. Kuehn, N. Kuropatkin, O. Lahav, M. Maia, J. Marshall, F. Menanteau, R. Miquel, A. Palmese, F. Paz-Chinchón, A. Plazas, A. Romer, E. Sánchez, B. Santiago, V. Scarpine, S. Serrano, M. Smith, M. Soares-Santos, E. Suchyta, G. Tarlé, D. Thomas, T. Varga, T. Varga, A. Walker   +73 more
semanticscholar   +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

Hunting for the Dark Matter Wake Induced by the Large Magellanic Cloud [PDF]

Astrophysical Journal, 2019
Satellite galaxies are predicted to generate gravitational density wakes as they orbit within the dark matter (DM) halos of their hosts, causing their orbits to decay over time. The recent infall of the Milky Way’s (MW) most massive satellite galaxy, the
N. Garavito-Camargo, G. Besla, C. Laporte, K. Johnston, F. G'omez, L. Watkins   +5 more
semanticscholar   +1 more source

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 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

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