Zobrazeno 1 - 10
of 531
pro vyhledávání: '"dust formation"'
Autor:
Andrew Mizener, Alexandra Pope, Jed McKinney, Patrick Kamieneski, Katherine E. Whitaker, Andrew Battisti, Eric Murphy
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 1, p 30 (2024)
We present the molecular gas content and interstellar medium conditions of MACS J0717_Az9, a strong gravitationally lensed z = 4.273, M _* ≃ 2 × 10 ^9 M _⊙ star-forming galaxy with an unusually high (∼80%) obscured star formation fraction. We
Externí odkaz:
https://doaj.org/article/40dd1595eb734594a33ac6d9303e2d59
Autor:
Alec S. Hirschauer, Nicolas Crouzet, Nolan Habel, Laura Lenkić, Conor Nally, Olivia C. Jones, Giacomo Bortolini, Martha L. Boyer, Kay Justtanont, Margaret Meixner, Göran Östlin, Gillian S. Wright, Ruyman Azzollini, Joris A. D. L. Blommaert, Bernhard Brandl, Leen Decin, Omnarayani Nayak, Pierre Royer, B. A. Sargent, Paul van der Werf
Publikováno v:
The Astronomical Journal, Vol 168, Iss 1, p 23 (2024)
We present a JWST imaging survey of I Zw 18, the archetypal extremely metal-poor, star-forming (SF), blue compact dwarf galaxy. With an oxygen abundance of only ∼3% Z _⊙ , it is among the lowest-metallicity systems known in the local Universe, an
Externí odkaz:
https://doaj.org/article/9e2728617aec4dfc8557fc0ee93a8fa7
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 2, p 191 (2024)
Reports on the detection of carbonates in planetary nebulae (PNe) and protostars have suggested the existence of a mechanism that produces these compounds in stellar winds and outflows. A subsequent laboratory study has reported a possible mechanism
Externí odkaz:
https://doaj.org/article/aa6459718ee1409e95222a05369dfa68
Autor:
Griffin Hosseinzadeh, David J. Sand, Jacob E. Jencson, Jennifer E. Andrews, Irene Shivaei, K. Azalee Bostroem, Stefano Valenti, Tamás Szalai, Jamison Burke, D. Andrew Howell, Curtis McCully, Megan Newsome, Estefania Padilla Gonzalez, Craig Pellegrino, Giacomo Terreran
Publikováno v:
The Astrophysical Journal Letters, Vol 942, Iss 1, p L18 (2023)
We present near- and mid-infrared (0.9–18 μ m) photometry of supernova (SN) 2021afdx, which was imaged serendipitously with the James Webb Space Telescope (JWST) as part of its Early Release Observations of the Cartwheel Galaxy. Our ground-based o
Externí odkaz:
https://doaj.org/article/ca9faeabdd154b7897de9a0c6fdd59fb
Publikováno v:
Технічна інженерія, Vol 2, Iss 88, Pp 148-167 (2021)
Dangerous properties of coal layers are the emergence of phenomena that contribute to the creation of emergencies in underground conditions with severe consequences for the health and lives of workers, as well as leads to significant economic losses.
Externí odkaz:
https://doaj.org/article/f36a737ca52b4c22b2d4ccda890263e5
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Publikováno v:
Записки Горного института, Vol 248, Pp 272-280 (2021)
Dust control in summer and winter periods is a topical problem associated with conducting open pit mining operations; however, at negative temperatures the additional requirements are imposed on dust suppressants. Preventive compositions are proposed
Externí odkaz:
https://doaj.org/article/8c09fb8451104c2385f63debbd3644f7
Autor:
Megan J. Peatt, Noel D. Richardson, Peredur M. Williams, Nicole Karnath, Victor I. Shenavrin, Ryan M. Lau, Anthony F. J. Moffat, Gerd Weigelt
Publikováno v:
The Astrophysical Journal, Vol 956, Iss 2, p 109 (2023)
WR 137 (HD 192641) is a binary system consisting of a carbon-rich Wolf–Rayet (W-R) star and an Oe companion star in a 13 yr orbit. Near periastron, the winds of the two stars collide and form carbonaceous dust. We obtained three mid-infrared grism
Externí odkaz:
https://doaj.org/article/a9eb931c1d164effb43c1ab385002cef
Autor:
Thiem Hoang, Bao Truong
Publikováno v:
The Astrophysical Journal, Vol 955, Iss 1, p 66 (2023)
Rapidly spinning magnetic grains can acquire large magnetic dipole moments due to the Barnett effect. Here we study the new effect of Barnett magnetic dipole–dipole interaction on grain–grain collisions and grain growth, assuming that grains are
Externí odkaz:
https://doaj.org/article/67c85dade0e74280bcb79287b78a1537
Autor:
Samaporn Tinyanont, Stan E. Woosley, Kirsty Taggart, Ryan J. Foley, Lin Yan, Ragnhild Lunnan, Kyle W. Davis, Charles D. Kilpatrick, Matthew R. Siebert, Steve Schulze, Chris Ashall, Ting-Wan Chen, Kishalay De, Georgios Dimitriadis, Dillon Z. Dong, Christoffer Fremling, Alexander Gagliano, Saurabh W. Jha, David O. Jones, Mansi M. Kasliwal, Hao-Yu Miao, Yen-Chen Pan, Daniel A. Perley, Vikram Ravi, César Rojas-Bravo, Itai Sfaradi, Jesper Sollerman, Vanessa Alarcon, Rodrigo Angulo, Karoli E. Clever, Payton Crawford, Cirilla Couch, Srujan Dandu, Atirath Dhara, Jessica Johnson, Zhisen Lai, Carli Smith
Publikováno v:
The Astrophysical Journal, Vol 951, Iss 1, p 34 (2023)
We present observations of a peculiar hydrogen- and helium-poor stripped-envelope (SE) supernova (SN) 2020wnt, primarily in the optical and near-infrared (near-IR). Its peak absolute bolometric magnitude of −20.9 mag ( L _bol, peak = (6.8 ± 0.3)
Externí odkaz:
https://doaj.org/article/77b20417448540ce838dec2758cfb5c1