Results 31 to 40 of about 3,801 (208)

Progress in Diamanes and Diamanoids Nanosystems for Emerging Technologies

Advanced Science, Volume 9, Issue 11, April 14, 2022., 2022
Diamanes and diamanoids are newly discovered graphitic carbon nanostructures. These nanosystems are sp3 carbon networks along with few sp2 hybridized carbon atoms which can be fabricated under controlled temperature & pressure using graphitic system as a precursor.
Santosh K. Tiwari, Raunak Pandey, Nannan Wang, Vijay Kumar, Olusegun J. Sunday, Michał Bystrzejewski, Yanqiu Zhu, Yogendra Kumar Mishra   +7 more
wiley   +1 more source

Exploiting the IRT-THESEUS Capability to Observe Lensed Quasars

Galaxies, 2021
THESEUS is an ESA space based project, which aims to explore the early universe by unveiling a complete census of Gamma-ray Burst (GRB) population in the first billion years.
Lindita Hamolli, Mimoza Hafizi, Francesco De Paolis, Achille A. Nucita   +3 more
doaj   +1 more source

Visible to Mid‐Infrared Optical Constants of Orthopyroxenes

Earth and Space Science, Volume 9, Issue 4, April 2022., 2022
Abstract Radiative transfer models of remotely acquired infrared spectra result in quantitative identification of minerals on planetary surfaces. Optical constants, or the real (n) and imaginary (k) indices of refraction are necessary inputs in such models.
Melinda J. Rucks, Cheng Ye, Elizabeth C. Sklute, Jessica A. Arnold, Nicholas J. DiFrancesco, Timothy D. Glotch   +5 more
wiley   +1 more source

An investigation of open cluster Melotte 72 using Gaia DR2

Astronomische Nachrichten, Volume 342, Issue 4, Page 613-624, May 2021., 2021
Abstract The estimation of the main parameters of star clusters is significant in astrophysical studies. The most important aspect of using the Gaia DR2 survey lies in the positions, parallax, and proper motions of cluster stars with homogeneous photometry that make the membership probability determine with high accuracy.
Yasser Hendy, Ashraf Tadross
wiley   +1 more source

A survey of Karin cluster asteroids with the Spitzer Space Telescope [PDF]

Icarus, 2009
Abstract The Karin cluster is one of the youngest known families of main-belt asteroids, dating back to a collisional event only 5.8 ± 0.2 Myr ago. Using the Spitzer Space Telescope we have photometrically sampled the thermal continua (3.5–22 μm) of 17 Karin cluster asteroids of different sizes, down to the smallest members discovered so ...
Harris, A.W., Mueller, M., Lisse, C.M., Cheng, A.F.   +3 more
openaire   +2 more sources

1I/‘Oumuamua as an N2 Ice Fragment of an exo‐Pluto Surface: I. Size and Compositional Constraints

Journal of Geophysical Research: Planets, Volume 126, Issue 5, May 2021., 2021
Abstract The origin of the interstellar object 1I/‘Oumuamua has defied explanation. We perform calculations of the non‐gravitational acceleration that would be experienced by bodies composed of a range of different ices and demonstrate that a body composed of N2 ice would satisfy the available constraints on the non‐gravitational acceleration, size ...
Alan P. Jackson, Steven J. Desch
wiley   +1 more source

1I/‘Oumuamua as an N2 Ice Fragment of an Exo‐Pluto Surface II: Generation of N2 Ice Fragments and the Origin of ‘Oumuamua

Journal of Geophysical Research: Planets, Volume 126, Issue 5, May 2021., 2021
Abstract The origin of the interstellar object 1I/‘Oumuamua has defied explanation. In a companion paper (Jackson & Desch, 2021), we show that a body of N2 ice with axes 45 m × 44 m × 7.5 m at the time of observation would be consistent with its albedo, nongravitational acceleration, and lack of observed CO or CO2 or dust.
S. J. Desch, A. P. Jackson
wiley   +1 more source

A Multiwavelength Classification and Study of Red Supergiant Candidates in NGC 6946

The Astrophysical Journal, 2023
We have combined resolved stellar photometry from Hubble Space Telescope (HST), Spitzer, and Gaia to identify red supergiant (RSG) candidates in NGC 6946, based on their colors, proper motions, visual morphologies, and spectral energy distributions.
Jared R. Johnson, Brad Koplitz, Benjamin F. Williams, Julianne J. Dalcanton, Andrew Dolphin, Léo Girardi   +5 more
doaj   +1 more source

Submillimeter Detections of Spitzer Space Telescope Galaxy Populations [PDF]

The Astrophysical Journal Supplement Series, 2004
Accepted for ApJS Spitzer Special Issue.
Serjeant, S., Mortier, A. M. J., Ivison, R. J., Egami, E., Rieke, G. H., Willner, S. P., Rigopoulou, D., Alonso-Herrero, A., Barmby, P., Bei, L., Dole, H., Engelbracht, C. W., Fazio, G. G., Floc'h, E. Le, Gordon, K. D., Greve, T. R., Hines, D. C., Huang, J. -S., Misselt, K. A., Miyazaki, S., Morrison, J. E., Papovich, C., Perez-Gonzalez, P. G., Rieke, M. J., Rigby, J., Wilson, G.   +25 more
openaire   +2 more sources

The Isaac Newton Telescope Monitoring project: Stellar population in the IC 10 dwarf irregular galaxy [PDF]

Iranian Journal of Astronomy and Astrophysics, 2019
We have conducted an optical monitoring survey of IC 10 dwarf irregular galaxy in the Local Group, using the Isaac Newton Telescope (INT) with the wide-field camera (WFC), to identify the Asymptotic Giant Branch stars (AGBs).
Mahtab Gholami, Mohammad Taghi Mirtorabi
doaj   +1 more source