Dust and Volatiles in the Disintegrating Comet C/2019 Y4 (ATLAS)

Autor: Ruining Zhao, Aigen Li, Bin Yang, Liang Wang, Huijuan Wang, Yu-Juan Liu, Jifeng Liu

Publikováno v: The Astrophysical Journal, Vol 963, Iss 2, p 90 (2024)

C/2019 Y4 (ATLAS) is an Oort cloud comet with an orbital period of ∼5895 yr. Starting in 2020 March, its nucleus underwent disintegration. In order to investigate the gas and dust properties of C/2019 Y4 (ATLAS) during its disintegration, we obtain

Externí odkaz: https://doaj.org/article/c046b96e5fcd4eea93a98ff0148c5be8

Spectroscopic evidence for a large spot on the dimming Betelgeuse

Autor: Sofya Alexeeva, Gang Zhao, Dong-Yang Gao, Junju Du, Aigen Li, Kai Li, Shaoming Hu

Publikováno v: Nature Communications, Vol 12, Iss 1, Pp 1-13 (2021)

The reason of the dimming of Betelgeuse is debated. Here, the authors show effective temperature decrease that can be explained by a large spot.

Externí odkaz: https://doaj.org/article/b3c954ad793e4e718ef4a8038a2047a3

Deuterated Polycyclic Aromatic Hydrocarbons in the Interstellar Medium: The Aliphatic C–D Band Strengths

Autor: X. J. Yang, Aigen Li

Publikováno v: The Astrophysical Journal Supplement Series, Vol 268, Iss 1, p 12 (2023)

Deuterium (D) was exclusively generated in the Big Bang, and the standard Big Bang nucleosynthesis (BBN) model predicts a primordial abundance of D/H ≈ 26 parts per million (ppm). As the Galaxy evolves, D/H gradually decreases because of astration.

Externí odkaz: https://doaj.org/article/6ec39ca98d2f4519b16f83834ed8609f

PDRs4All: A JWST Early Release Science Program on Radiative Feedback from Massive Stars

Autor: Olivier Berné, Émilie Habart, Els Peeters, Alain Abergel, Edwin A. Bergin, Jeronimo Bernard-Salas, Emeric Bron, Jan Cami, Emmanuel Dartois, Asunción Fuente, Javier R. Goicoechea, Karl D. Gordon, Yoko Okada, Takashi Onaka, Massimo Robberto, Markus Röllig, Alexander G. G. M. Tielens, Sílvia Vicente, Mark G. Wolfire, Felipe Alarcón, C. Boersma, Amélie Canin, Ryan Chown, Daniel Dicken, David Languignon, Romane Le Gal, Marc W. Pound, Boris Trahin, Thomas Simmer, Ameek Sidhu, Dries Van De Putte, Sara Cuadrado, Claire Guilloteau, Alexandros Maragkoudakis, Bethany R. Schefter, Thiébaut Schirmer, Stéphanie Cazaux, Isabel Aleman, Louis Allamandola, Rebecca Auchettl, Giuseppe Antonio Baratta, Salma Bejaoui, Partha P. Bera, Goranka Bilalbegović, John H. Black, Francois Boulanger, Jordy Bouwman, Bernhard Brandl, Philippe Brechignac, Sandra Brünken, Andrew Burkhardt, Alessandra Candian, Jose Cernicharo, Marin Chabot, Shubhadip Chakraborty, Jason Champion, Sean W. J. Colgan, Ilsa R. Cooke, Audrey Coutens, Nick L. J. Cox, Karine Demyk, Jennifer Donovan Meyer, Cécile Engrand, Sacha Foschino, Pedro García-Lario, Lisseth Gavilan, Maryvonne Gerin, Marie Godard, Carl A. Gottlieb, Pierre Guillard, Antoine Gusdorf, Patrick Hartigan, Jinhua He, Eric Herbst, Liv Hornekaer, Cornelia Jäger, Eduardo Janot-Pacheco, Christine Joblin, Michael Kaufman, Francisca Kemper, Sarah Kendrew, Maria S. Kirsanova, Pamela Klaassen, Collin Knight, Sun Kwok, Álvaro Labiano, Thomas S.-Y. Lai, Timothy J. Lee, Bertrand Lefloch, Franck Le Petit, Aigen Li, Hendrik Linz, Cameron J. Mackie, Suzanne C. Madden, Joëlle Mascetti, Brett A. McGuire, Pablo Merino, Elisabetta R. Micelotta, Karl Misselt, Jon A. Morse, Giacomo Mulas, Naslim Neelamkodan, Ryou Ohsawa, Alain Omont, Roberta Paladini, Maria Elisabetta Palumbo, Amit Pathak, Yvonne J. Pendleton, Annemieke Petrignani, Thomas Pino, Elena Puga, Naseem Rangwala, Mathias Rapacioli, Alessandra Ricca, Julia Roman-Duval, Joseph Roser, Evelyne Roueff, Gaël Rouillé, Farid Salama, Dinalva A. Sales, Karin Sandstrom, Peter Sarre, Ella Sciamma-O’Brien, Kris Sellgren, Matthew J. Shannon, Sachindev S. Shenoy, David Teyssier, Richard D. Thomas, Aditya Togi, Laurent Verstraete, Adolf N. Witt, Alwyn Wootten, Nathalie Ysard, Henning Zettergren, Yong Zhang, Ziwei E. Zhang, Junfeng Zhen

Publikováno v: Publications of the Astronomical Society of the Pacific
Publications of the Astronomical Society of the Pacific, 2022, 134 (1035), pp.054301. ⟨10.1088/1538-3873/ac604c⟩
Publications of the Astronomical Society of the Pacific, 134, 1-22
Astronomical Society of the Pacific. Publications, 134(1035)
Publications of the Astronomical Society of the Pacific, 134(1035):054301. University of Chicago
Publications of the Astronomical Society of the Pacific, 134(1035):054301
Berné, O, Habart, É, Peeters, E, Abergel, A, Bergin, E A, Bernard-Salas, J, Bron, E, Cami, J, Dartois, E, Fuente, A, Goicoechea, J R, Gordon, K D, Okada, Y, Onaka, T, Robberto, M, Röllig, M, Tielens, A G G M, Vicente, S, Wolfire, M G, Alarcón, F, Boersma, C, Canin, A, Chown, R, Dicken, D, Languignon, D, Le Gal, R, Pound, M W, Trahin, B, Simmer, T, Sidhu, A, Van De Putte, D, Cuadrado, S, Guilloteau, C, Maragkoudakis, A, Schefter, B R, Schirmer, T, Cazaux, S, Aleman, I, Allamandola, L, Auchettl, R, Antonio Baratta, G, Bejaoui, S, Bera, P P, Bilalbegović, G, Black, J H, Boulanger, F, Bouwman, J, Brandl, B, Brechignac, P, Brünken, S, Burkhardt, A, Candian, A, Cernicharo, J, Chabot, M, Chakraborty, S, Champion, J, Colgan, S W J, Cooke, I R, Coutens, A, Cox, N L J, Demyk, K, Donovan Meyer, J, Engrand, C, Foschino, S, García-Lario, P, Gavilan, L, Gerin, M, Godard, M, Gottlieb, C A, Guillard, P, Gusdorf, A, Hartigan, P, He, J, Herbst, E, Hornekaer, L, Jäger, C, Janot-Pacheco, E, Joblin, C, Kaufman, M, Kemper, F, Kendrew, S, Kirsanova, M S, Klaassen, P, Knight, C, Kwok, S, Labiano, Á, Lai, T S Y, Lee, T J, Lefloch, B, Le Petit, F, Li, A, Linz, H, MacKie, C J, Madden, S C, Mascetti, J, McGuire, B A, Merino, P, Micelotta, E R, Misselt, K, Morse, J A, Mulas, G, Neelamkodan, N, Ohsawa, R, Omont, A, Paladini, R, Elisabetta Palumbo, M, Pathak, A, Pendleton, Y J, Petrignani, A, Pino, T, Puga, E, Rangwala, N, Rapacioli, M, Ricca, A, Roman-Duval, J, Roser, J, Roueff, E, Rouillé, G, Salama, F, Sales, D A, Sandstrom, K, Sarre, P, Sciamma-O'brien, E, Sellgren, K, Shannon, M J, Shenoy, S S, Teyssier, D, Thomas, R D, Togi, A, Verstraete, L, Witt, A N, Wootten, A, Ysard, N, Zettergren, H, Zhang, Y, Zhang, Z E & Zhen, J 2022, ' PDRs4All : A JWST Early Release Science Program on Radiative Feedback from Massive Stars ', Publications of the Astronomical Society of the Pacific, vol. 134, no. 1035, 054301 . https://doi.org/10.1088/1538-3873/ac604c
Publications of the Astronomical Society of the Pacific, 134, 1035, pp. 1-22

22 pags., 8 figs., 1 tab.
Massive stars disrupt their natal molecular cloud material through radiative and mechanical feedback processes. These processes have profound effects on the evolution of interstellar matter in our Galaxy and throughout

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eef73975e3b0f8c52eaaf7a3e69e054a
https://hdl.handle.net/2066/250976

Where have all the interstellar silicon carbides gone?

Autor: Aigen Li, C. Y. Xiao, C.T. Zhou, Tao Chen

Publikováno v: Monthly Notices of the Royal Astronomical Society. 509:5231-5236

The detection of the 11.3-micron emission feature characteristic of the Si--C stretch in carbon-rich evolved stars reveals that silicon carbide (SiC) dust grains are condensed in the outflows of carbon stars. SiC dust could be a significant constitue

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::62a16aaa2ff7367f8e2885fd99fe033d
https://doi.org/10.1093/mnras/stab3175