Results 41 to 50 of about 343,655 (292)

The Magellanic Clouds Photomtric Survey: The Small Magellanic Cloud Stellar Catalog and Extinction Map [PDF]

, 2001
We present our catalog of U, B, V, and I stellar photometry of the central 18 deg2 area of the Small Magellanic Cloud. We combine our data with the Two Micron All Sky Survey and Deep Near-Infrared Southern Sky Survey (DENIS) catalogs to provide, when ...
D. Zaritsky, J. Harris, I. Thompson, E. Grebel, P. Massey   +4 more
semanticscholar   +1 more source

Constraining mixing in massive stars in the Small Magellanic Cloud [PDF]

Astronomy & Astrophysics, 2019
Context. The evolution of massive stars is strongly influenced by internal mixing processes such as semiconvection, convective core overshooting, and rotationally induced mixing. None of these processes are currently well constrained. Aims.
A. Schootemeijer, N. Langer, N. Grin, Chen Wang   +3 more
semanticscholar   +1 more source

A new multi‐messenger description of starburst galaxies emission: perspectives for neutrino and gamma‐ray observations

Astronomische Nachrichten, Volume 344, Issue 1-2, January-February 2023., 2023
Abstract Star‐forming and starburst galaxies (SBGs), which are well‐known cosmic‐ray (CR) reservoirs, are expected to emit gamma rays and neutrinos predominantly via hadronic collisions. In this work we analyze the 10‐year Fermi‐Low Energy Technique (LAT) spectral energy distributions of 13 nearby galaxies by means of a physical model that accounts for
Antonio Marinelli, Antonio Ambrosone, Marco Chianese, Damiano Fiorillo, Gennaro Miele, Ofelia Pisanti   +5 more
wiley   +1 more source

The VMC survey – XXV. The 3D structure of the Small Magellanic Cloud from Classical Cepheids [PDF]

, 2017
The "VISTA near-infrared YJKs survey of the Magellanic System" (VMC) is collecting deep Ks-band time-series photometry of pulsating stars hosted by the two Magellanic Clouds and their connecting Bridge.
V. Ripepi, M. Cioni, M. Moretti, M. Marconi, K. Bekki, G. Clementini, R. Grijs, J. Emerson, M. Groenewegen, V. Ivanov, R. Molinaro, T. Muraveva, Joana M. Oliveira, A. Piatti, S. Subramanian, J. V. Loon   +15 more
semanticscholar   +1 more source

The Proper Motion Field of the Small Magellanic Cloud: Kinematic Evidence for Its Tidal Disruption [PDF]

Astrophysical Journal, 2018
We present a new measurement of the systemic proper motion of the Small Magellanic Cloud (SMC), based on an expanded set of 30 fields containing background quasars and spanning a ∼3 year baseline, using the Hubble Space Telescope (HST) Wide Field Camera ...
P. Zivick, N. Kallivayalil, R. P. van der Marel, G. Besla, S. Linden, S. Kozłowski, T. Fritz, C. Kochanek, J. Anderson, S. Sohn, M. Geha, C. Alcock   +11 more
semanticscholar   +1 more source

The Star Formation History of the Small Magellanic Cloud [PDF]

, 2003
We present the spatially resolved star formation and chemical enrichment history of the Small Magellanic Cloud (SMC) across the entire central 4° × 4.°5 area of the main body, based on UBVI photometry from our Magellanic Clouds Photometric Survey.
J. Harris, D. Zaritsky
semanticscholar   +1 more source

Determination of the Primordial Helium Abundance Based on NGC 346, an H ii Region of the Small Magellanic Cloud [PDF]

Astrophysical Journal, 2019
To place meaningful constraints on Big Bang Nucleosynthesis models, the primordial helium abundance determination is crucial. Low-metallicity H ii regions have been used to estimate it because their statistical uncertainties are relatively small.
M. Valerdi, A. Peimbert, M. Peimbert, A. Sixtos   +3 more
semanticscholar   +1 more source

The intrinsic reddening of the Magellanic Clouds as traced by background galaxies – II. The Small Magellanic Cloud [PDF]

Monthly Notices of the Royal Astronomical Society, 2020
ABSTRACT We present a map of the total intrinsic reddening across ≃34 deg2 of the Small Magellanic Cloud (SMC) derived using optical (ugriz) and near-infrared (IR; YJKs) spectral energy distributions (SEDs) of background galaxies. The reddening map is created using a subsample of 29 274 galaxies with low levels of intrinsic reddening ...
Joana M. Oliveira, A. Katherina Vivas, Clara M. Pennock, Jacco Th. van Loon, Gisella Clementini, Cameron P. M. Bell, David L. Nidever, Angus H. Wright, Vincenzo Ripepi, Steven R. Majewski, Pol Massana, Dennis Zaritsky, Y. Choi, Y. Choi, Marcella Marconi, Florian Niederhofer, Valentin D. Ivanov, Richard de Grijs, Richard de Grijs, S. Rubele, S. Rubele, Noelia E. D. Noël, David Martínez-Delgado, Smitha Subramanian, Samyaday Choudhury, Ricardo R. Muñoz, Knut Olsen, Ben L. Tatton, Maria-Rosa L. Cioni   +28 more
openaire   +5 more sources

UVIT Observations of the Small Magellanic Cloud: Point-source Catalog

The Astrophysical Journal, 2023
Three fields in the outskirts of the Small Magellanic Cloud were observed by the UltraViolet Imaging Telescope (UVIT) on board AstroSat, between 2017 December 31 and 2018 January 1.
A. Devaraj, P. Joseph, C. S. Stalin, S. N. Tandon, S. K. Ghosh   +4 more
doaj   +1 more source

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