Zobrazeno 1 - 10
of 178
pro vyhledávání: '"Otsuka, Masaaki"'
H4-1 is a planetary nebula (PN) located in the Galactic halo, and is notably carbon-rich and one of the most metal-deficient PNe in the Milky Way. To unveil its progenitor evolution through the accurate measurement of the gas mass, we conducted a com
Externí odkaz:
http://arxiv.org/abs/2309.15099
Autor:
Nagoshi, Shumpei, Iwamuro, Fumihide, Yamada, Satoshi, Ueda, Yoshihiro, Oikawa, Yuto, Otsuka, Masaaki, Isogai, Keisuke, Mineshige, Shin
The physical origins of quasar components, such as the broad line region (BLR) and dust torus, remain under debate. To gain insights into them, we focused on Changing-State Quasars (CSQs) which provide a unique perspective through structural changes
Externí odkaz:
http://arxiv.org/abs/2306.13930
Autor:
De Marco, Orsola, Akashi, Muhammad, Akras, Stavros, Alcolea, Javier, Aleman, Isabel, Amram, Philippe, Balick, Bruce, De Beck, Elvire, Blackman, Eric G., Boffin, Henri M. J., Boumis, Panos, Bublitz, Jesse, Bucciarelli, Beatrice, Bujarrabal, Valentin, Cami, Jan, Chornay, Nicholas, Chu, You-Hua, Corradi, Romano L. M., Frank, Adam, Garcia-Segura, Guillermo, Garcia-Hernandez, D. A., Garcia-Rojas, Jorge, Gomez-Llanos, Veronica, Goncalves, Denise R., Guerrero, Martin A., Jones, David, Karakas, Amanda I., Kastner, Joel H., Kwok, Sun, Lykou, Foteini, Manchado, Arturo, Matsuura, Mikako, McDonald, Iain, Monreal-Ibero, Ana, Monteiro, Hektor, Baez, Paula Moraga, Morisset, Christophe, Miszalski, Brent, Mohamed, Shazrene S., Montez Jr., Rodolfo, Nordhaus, Jason, de Oliveira, Claudia Mendes, Osborn, Zara, Otsuka, Masaaki, Parker, Quentin A., Peeters, Els, Quint, Bruno C., Quintana-Lacaci, Guillermo, Redman, Matt, Ruiter, Ashley J., Sabin, Laurence, Contreras, Carmen Sanchez, Santander-Garcia, Miguel, Seitenzahl, Ivo, Sahai, Raghvendra, Soker, Noam, Speck, Angela K., Stanghellini, Letizia, Steffen, Wolfgang, Toala, Jesus A., Ueta, Toshiya, Van de Steene, Griet, Villaver, Eva, Ventura, Paolo, Vlemmings, Wouter, Walsh, Jeremy R., Wesson, Roger, van Winckel, Hans, Zijlstra, Albert A.
Publikováno v:
Nature Astronomy, 2022, Vol. 6, p. 1421
Planetary nebulae (PNe), the ejected envelopes of red giant stars, provide us with a history of the last, mass-losing phases of 90 percent of stars initially more massive than the Sun. Here, we analyse James Webb Space Telescope (JWST) Early Release
Externí odkaz:
http://arxiv.org/abs/2301.02775
We derived position-velocity density distribution diagrams along the major (PA = 77$^{\circ}$) axis of the elliptical planetary nebula NGC 7009 with the Keck HIRES [SII] 6716/6731 \A, doublet spectral images. The average densities of the main shell a
Externí odkaz:
http://arxiv.org/abs/2212.10056
Autor:
Takami, Michihiro, Guenther, Hans Moritz, Schneider, P. Christian, Beck, Tracy L., Karr, Jennifer L., Ohyama, Youichi, Galvan-Madrid, Roberto, Uyama, Taichi, White, Marc, Grankin, Konstantin, Coffey, Deirdre, Liu, Chun-Fan, Fukagawa, Misato, Manset, Nadine, Chen, Wen-Ping, Pyo, Tae-Soo, Shang, Hsien, Ray, Thomas P., Otsuka, Masaaki, Chou, Mei-Yin
We present Gemini-NIFS, VLT-SINFONI and Keck-OSIRIS observations of near-infrared [Fe II] emission associated with the well-studied jets from three active T Tauri stars; RW Aur A, RY Tau and DG Tau taken from 2012-2021. We primarily covered the redsh
Externí odkaz:
http://arxiv.org/abs/2210.10310
Autor:
Ueta, Toshiya, Otsuka, Masaaki
Publikováno v:
A&A 667, L8 (2022)
Plasma diagnostics are the bases of investigation into the physical and chemical properties of line-emitting gaseous systems. To perform plasma diagnostics properly, it is essential to correct the input spectrum for extinction properly. This is simpl
Externí odkaz:
http://arxiv.org/abs/2210.07091
Publikováno v:
The Astrophysical Journal, 2022
We analyzed the minor axis spectra of the elliptical planetary nebula (PN) NGC 7009 observed with the Keck HIRES with a 0.862$"$ $\times$ 10$"$ slit placed at about $\sim$7.5$"$ and 10$"$ away from the center and a 0.862$"$ $\times$ 14$"$ slit at the
Externí odkaz:
http://arxiv.org/abs/2209.09052
Autor:
Otsuka, Masaaki
We investigated the physical and chemical properties of the gas and dust components in a carbon-rich planetary nebula (PN) IC2165 using two-dimensional (2-D) emission-line maps with superior resolution. The extinction map is generated in a self-consi
Externí odkaz:
http://arxiv.org/abs/2202.00981
Autor:
Ueta, Toshiya, Otsuka, Masaaki
In this work, we propose a proper plasma analysis practice (PPAP), an updated procedure of plasma diagnostics in the era of spatially-resolved spectroscopy. In particular, we emphasize the importance of performing both of the extinction correction an
Externí odkaz:
http://arxiv.org/abs/2108.11007
Publikováno v:
Journal of the Magnetics Society of Japan, Volume 45 Issue 6 Pages 142-148 (2021)
Magnetism of fullerene C60 was studied by three methods of the density functional theory (DFT) calculation, laboratory experiment and astronomical observation. DFT revealed that the most stable spin state was non-magnetic one of Sz=0/2. This is contr
Externí odkaz:
http://arxiv.org/abs/2107.04725