Results 21 to 30 of about 22,251 (204)

Magellanic Clouds Cepheids: Thorium Abundances [PDF]

Journal of Astronomy and Space Sciences, 2018
The analysis of the high-resolution spectra of 31 Magellanic Clouds Cepheid variables enabled the identification of thorium lines. The abundances of thorium were found with spectrum synthesis method. The calculated thorium abundances exhibit correlations
Yeuncheol Jeong, Alexander V. Yushchenko, Vira F. Gopka, Volodymyr O. Yushchenko, Valery V. Kovtyukh, Svetlana V. Vasil’eva   +5 more
doaj   +1 more source

Optical spectra of radio planetary nebulae in the large Magellanic Cloud [PDF]

Serbian Astronomical Journal, 2008
We present 11 spectra from 12 candidate radio sources co-identified with known planetary nebulae (PNe) in the Large Magellanic Cloud (LMC). Originally found in Australia Telescope Compact Array (ATCA) LMC surveys at 1.4, 4.8 and 8.64 GHz and confirmed by
Payne J.L., Filipović M.D., Millar W.C., Crawford E.J., de Horta A.Y., Stootman F.H., Urošević D.   +6 more
doaj   +3 more sources

CCD imagers for the Transiting Exoplanet Survey Satellite from benchtop to space environment

Astronomische Nachrichten, Volume 344, Issue 8-9, October-November 2023., 2023
Abstract The Transiting Exoplanet Survey Satellite (TESS) is a Massachusetts Institute of Technology‐led NASA Explorer‐class mission planned to spend 2 years discovering transiting exoplanets by an all‐sky survey. The observatory contains four wide field‐of‐view camera systems for a total of 16.8 Megapixel, low‐noise, low‐power CCD detectors.
Vyshnavi Suntharalingam, Ilya Prigozhin, Keith Warner, Douglas Young, Deborah Woods, Gregory Berthiaume   +5 more
wiley   +1 more source

Planetary nebulae in the Small Magellanic Cloud [PDF]

Monthly Notices of the Royal Astronomical Society, 2016
Accepted for publication in MNRAS, 11 pages, 4 ...
VENTURA, Paolo, STANGHELLINI, Letizia, DI CRISCIENZO, Marcella, García-Hernández, D. A., Dell'Agli, Flavia   +4 more
openaire   +3 more sources

LRO‐LAMP Lunar South Pole Cold Traps: Assessment of H2O and Potential CO2 and NH3 Reserves

Journal of Geophysical Research: Planets, Volume 128, Issue 8, August 2023., 2023
Abstract Nighttime Lyman Alpha Mapping Project (LAMP) observations are used to investigate condensed volatiles at the south polar region of the Moon. This study incorporates LAMP data from the first ∼7 years of the mission and Diviner annual maximum temperatures to search for volatile signatures associated with H2O, NH3, and CO2. Other stable potential
L. O. Magaña, K. D. Retherford, B. D. Byron, A. R. Hendrix, C. Grava, K. E. Mandt, U. Raut, E. Czajka, P. O. Hayne, D. M. Hurley, G. R. Gladstone, M. J. Poston, T. K. Greathouse, W. Pryor, J. T. Cahill, A. Stickle   +15 more
wiley   +1 more source

An Unbiased CO Survey Toward the Northern Region of the Small Magellanic Cloud with the Atacama Compact Array. II. CO Cloud Catalog

The Astrophysical Journal, 2023
The nature of molecular clouds and their statistical behavior in subsolar metallicity environments are not fully explored yet. We analyzed data from an unbiased CO ( J = 2–1) survey at the spatial resolution of ∼2 pc in the northern region of the Small ...
Takahiro Ohno, Kazuki Tokuda, Ayu Konishi, Takeru Matsumoto, Marta Sewiło, Hiroshi Kondo, Hidetoshi Sano, Kisetsu Tsuge, Sarolta Zahorecz, Nao Goto, Naslim Neelamkodan, Tony Wong, Hajime Fukushima, Tatsuya Takekoshi, Kazuyuki Muraoka, Akiko Kawamura, Kengo Tachihara, Yasuo Fukui, Toshikazu Onishi   +18 more
doaj   +1 more source

Photometry and astrometry with JWST‐II: NIRCam distortion correction

Astronomische Nachrichten, Volume 344, Issue 3, March 2023., 2023
Abstract In preparation to make the most of our own planned James Webb Space Telescope investigations, we take advantage of publicly available calibration and early‐science observations to independently derive and test a geometric‐distortion solution for NIRCam detectors. Our solution is able to correct the distortion to better than ∼$$ \sim $$0.2 mas.
M. Griggio, D. Nardiello, L. R. Bedin
wiley   +1 more source

Not only climate: The importance of biotic interactions in shaping species distributions at macro scales

Ecology and Evolution, Volume 13, Issue 3, March 2023., 2023
Traditionally abiotic factors are considered the main drivers of biodiversity at macro‐scales, whereas biotic factors are considered important almost only at local scales. Modeling the distribution of 177 African bat species, we demonstrated the importance of considering biotic interactions in SDMs at macro‐scales regardless of the species’ ecology ...
Francesca Cosentino, Ernest Charles James Seamark, Victor Van Cakenberghe, Luigi Maiorano   +3 more
wiley   +1 more source

CHARACTERIZING MAGNETOHYDRODYNAMIC TURBULENCE IN THE SMALL MAGELLANIC CLOUD [PDF]

The Astrophysical Journal, 2009
We investigate the nature and spatial variations of turbulence in the Small Magellanic Cloud (SMC) by applying several statistical methods on the neutral hydrogen (HI) column density image of the SMC and a database of isothermal numerical simulations.
Burkhart, Blakesley, Stanimirović, Snežana, Lazarian, A., Kowal, Grzegorz   +3 more
openaire   +3 more sources

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