Results 61 to 70 of about 12,394 (217)

Trans‐Crustal Geophysical Responses Beneath the Supergiant Timmins‐Porcupine Orogenic Gold Camp, Canada

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 3, March 2025.
Abstract A new 80‐site magnetotelluric (MT) survey, integrated with reprocessed seismic reflection profiles, across the supergiant Timmins‐Porcupine gold camp of the Abitibi greenstone belt (AGB) was conducted to investigate the architecture of crustal‐scale structures.
A. Q. Adetunji, I. J. Ferguson, J. M. Simmons, C. Ma, S. Cheraghi, D. B. Snyder, J. A. Ayer   +6 more
wiley   +1 more source

Machine Learning‐Based Spatio‐Temporal Prospectivity Modeling of Porphyry Systems in the New Guinea and Solomon Islands Region

Tectonics, Volume 44, Issue 3, March 2025.
Abstract The discovery of new economic copper deposits is critical for the development of renewable energy infrastructure and zero‐emissions transport. The majority of existing copper mines are located within current or extinct continental arc systems, but our understanding of the tectonic and geodynamic conditions favoring the formation of porphyry ...
Ehsan Farahbakhsh, Sabin Zahirovic, Brent McInnes, Sara Polanco, Fabian Kohlmann, Maria Seton, R. Dietmar Müller   +6 more
wiley   +1 more source

XMM‐Newton Observations of the Peculiar Be X‐Ray Binary A0538‐66

Astronomische Nachrichten, Volume 346, Issue 1, January 2025.
ABSTRACT A0538‐66 is a neutron star/Be x‐ray binary located in the Large Magellanic Cloud and, since its discovery in the 70s, it showed a peculiar behavior that makes it a unique object in the high‐mass x‐ray binaries scene: the extremely eccentric orbit (e=0.72$$ e=0.72 $$), the short spin period of the neutron star (P=69$$ P=69 $$ ms), the episodes ...
Michela Rigoselli, Caterina Tresoldi, Lorenzo Ducci, Sandro Mereghetti   +3 more
wiley   +1 more source

Beyond Accretion Limits: The Rise of Pulsating Gems

Astronomische Nachrichten, Volume 346, Issue 1, January 2025.
ABSTRACT The discovery of several ultraluminous X‐ray sources exhibiting fast and rapidly evolving X‐ray pulsations unequivocally associates these sources with accreting neutron stars orbiting relatively massive companion stars (> 8M ⊙$$ {}_{\odot } $$).
Gian Luca Israel, Roberta Amato, Matteo Imbrogno, Nicoló Oreste Pinciroli Vago, on behalf of a Larger Team, Guillermo Andres Rodríguez Castillo, Andrea Belfiore, Luigi Stella, Matteo Bachetti, Felix Fürst, Dom Walton, Matthew Middleton, Murray Brightman, Fabio Pintore, Ciro Pinto, Silvia Conforti, Luca Zampieri, Chiara Salvaggio, Anna Wolter, Andrea Tiengo, Andrea De Luca, Paolo Esposito, Ruben Salvaterra, Hannah Earnshaw, Tim Roberts, Andres Gúrpide, Sara Motta   +26 more
wiley   +1 more source

The MACHO Project 9 Million Star Color-Magnitude Diagram of the Large Magellanic Cloud [PDF]

, 2000
We present a 9 million star color-magnitude diagram (9M CMD) of the LMC bar. The 9M CMD reveals a complex superposition of different age and metallicity stellar populations, with important stellar evolutionary phases occurring over 3 orders of magnitude ...
A. B. Tomaney, A. Basu, A. C. Becker, A. J. Drake, B. A. Peterson, Becker S. A., Bertelli G., Bertelli G., Bessell M. S., Bono G., C. A. Nelson, C. Alcock, C. W. Stubbs, Catelan M., Corsi C. E., D. L. Welch, D. Minniti, D. P. Bennett, D. R. Alves, Elson R. A. W., Fagotto F., Fall S. M., Ferraro F., Guarnieri M. D., Hatzidimitriou D., Hoppner W., Jurcsik J., K. C. Freeman, K. Griest, K. H. Cook, L. King, Langer N., Lattanzio J. C., Lauterborn D., Lloyd Evans T., M. Geha, M. J. Lehner, M. R. Pratt, Maeder A., Marigo P., Ng Y. K., Ojha D. K., P. J. Quinn, P. Popowski, Pike C. D., R. A. Allsman, Reid N., Reid N., S. L. Marshall, Salaris M., Saviane I., Schaerer D., Schroder K.-P., Stothers R. B., T. S. Axelrod, T. Vandehei, Tifft W. G., W. Sutherland, Yoshii Y.   +58 more
core   +2 more sources

Post-Red Supergiants

, 2008
The yellow hypergiants are found in a stage between the massive Red Supergiants and the Wolf-Rayet stars. This review addresses current issues concerning the evolution of massive stars, concentrating on the transitional post-Red Supergiant phase.
Oudmaijer, Rene, Davies, Ben, de Wit, Willem-Jan, Patel, Mitesh   +3 more
openaire   +2 more sources

Weakly Magnetized Accreting Neutron Stars as Seen by IXPE

Astronomische Nachrichten, Volume 346, Issue 1, January 2025.
ABSTRACT The Imaging X‐ray Polarimetry Explorer, recently awarded by the American Astronomical Society with the Bruno Rossi prize, observed several accreting neutron stars in X‐ray binaries during the first 2 years of its prime mission. Results obtained for weakly magnetized neutron stars allow us to model the geometry and the physical status of the ...
Alessandro Di Marco, on behalf of IXPE Science Team   +1 more
wiley   +1 more source

Modeling the near-infrared lines of O-type stars [PDF]

, 2004
We use a grid of 30 line-blanketed unified stellar photosphere and wind models for O-type stars; computed with the code CMFGEN in order to evaluate its potential in the near-infrared spectral domain. The grid includes dwarfs, giants and supergiants.
de Koter, A., Lenorzer, A., Mokiem, M. R., Puls, J.   +3 more
core   +2 more sources

Stellar winds in a-type supergiants [PDF]

International Astronomical Union Colloquium, 1989
The contribution of A supergiant stars to the return of mass and energy to the interstellar medium is not very important. Abbott (1982) analised a sample of early stars and concluded that B and A supergiants provided less than 8 % of the mass input to the ISM by stellar winds.
A. Talavera, A.I. Gomez de Castro
openaire   +1 more source

Insulin‐Like Growth Factor 1 (IGF1) in the Chinese Soft‐Shelled Turtle, Pelodiscus sinensis: Molecular Characterization, Expression Pattern, and Polymorphism Analysis

Journal of Applied Ichthyology, Volume 2025, Issue 1, 2025.
Insulin‐like growth Factor 1 (IGF1) plays a vital role in vertebrate growth, and its sexually biased expression may influence the development and evolution of sexual size dimorphism (SSD). To investigate the role of IGF1 in regulating the growth of the Chinese soft‐shelled turtle (Pelodiscus sinensis), this study quantified IGF1 mRNA abundance across ...
Dan Zeng, Yangyang Tu, Gongwei Sun, Mengying Chen, Yunsheng Zhang, Xiaoqing Wang, Liangguo Liu, Levy Otwoma   +7 more
wiley   +1 more source