Zobrazeno 1 - 10
of 88
pro vyhledávání: '"Schoenrich, Ralph"'
Galactic bars are found in the majority of disc galaxies. They rotate nearly rigidly with an angular frequency called pattern speed. Previous idealised simulations have shown that bar pattern speed decreases with time due to dynamical friction exerte
Externí odkaz:
http://arxiv.org/abs/2407.11154
Autor:
Dehnen, Walter, Schönrich, Ralph, Drimmel, Ronald, Chrobáková, Žofia, Poggio, Eloisa, Semczuk, Marcin
Huang et al. (2024) measured the derivative of the phase $\phi_{\mathrm{w}}$ of the Galactic warp traced by classical Cepheids with respect to their age $\tau$ and interpreted it as the warp precession rate $\omega\equiv\mathrm{d}\phi_{\mathrm{w}}/\m
Externí odkaz:
http://arxiv.org/abs/2407.06341
Decoding the key dynamical processes that shape the Galactic disk structure is crucial for reconstructing the Milky Way's evolution history. The second Gaia data release unveils a novel wave pattern in the $L_Z-\langle V_R\rangle$ space, but its form
Externí odkaz:
http://arxiv.org/abs/2403.14953
Autor:
Friske, Jennifer K S, Schönrich, Ralph
Nuclear Stellar Discs have been observed in the vast majority of barred disc galaxies including the Milky Way. Their intense star formation is sustained by the intense gas inflows driven by their surrounding bars and frequently supports a large-scale
Externí odkaz:
http://arxiv.org/abs/2310.01899
Roman Early-Definition Astrophysics Survey Opportunity: Galactic Roman Infrared Plane Survey (GRIPS)
Autor:
Paladini, Roberta, Zucker, Catherine, Benjamin, Robert, Nataf, David, Minniti, Dante, Zasowski, Gail, Peek, Joshua, Carey, Sean, Allen, Lori, Alonso-Garcia, Javier, Alves, Joao, Anders, Friederich, Athanassoula, Evangelie, Beers, Timothy C., Bird, Jonathan, Bland-Hwathorn, Joss, Brown, Anthony, Buder, Sven, Casagrande, Luca, Casey, Andrew, Cassisi, Santi, Catelan, Marcio, Chary, Ranga-Ram, Chene, Andre-Nicolas, Ciardi, David, Comeron, Fernando, Cohen, Roger, Dame, Thomas, Drimmel, Ronald, Trincado, Jose Fernandez, Finkbeiner, Douglas, Geisler, Douglas, Gennaro, Mario, Goodman, Alyssa, Green, Gregory, Hajdu, Gergely, Henderson, Calen, Hora, Joseph, Ivanov, Valentin D., Kirkpatrick, Davy, Kobayashi, Chiaki, Kuhn, Michael, Kunder, Andres, Lu, Jessica, Lucas, Philip W., Majaess, Daniel, Megeath, S. Thomas, Meisner, Aaron, Molinari, Sergio, Mroz, Przemek, Ness, Meliss, Neumayer, Nadine, Nogueras-Lara, Francisco, Noriega-Crespo, Alberto, Poleski, Radek, Rix, Hans-Walter, Rebull, Luisa, Reggiani, Henrique, Rejkuba, Marina, Saito, Roberto K., Schoenrich, Ralph, Saydjari, Andrew, Schisano, Eugenio, Schlafly, Edward, Schlaufman, Keving, Smith, Leigh, Speagle, Joshua, Wisz, Dan, Wyse, Rosemary, Zakamska, Nadia
A wide-field near-infrared survey of the Galactic disk and bulge/bar(s) is supported by a large representation of the community of Galactic astronomers. The combination of sensitivity, angular resolution and large field of view make Roman uniquely ab
Externí odkaz:
http://arxiv.org/abs/2307.07642
Autor:
Kawata, Daisuke, Kawahara, Hajime, Gouda, Naoteru, Secrest, Nathan J., Kano, Ryouhei, Kataza, Hirokazu, Isobe, Naoki, Ohsawa, Ryou, Usui, Fumihiko, Yamada, Yoshiyuki, Graham, Alister W., Pettitt, Alex R., Asada, Hideki, Baba, Junichi, Bekki, Kenji, Dorland, Bryan N., Fujii, Michiko, Fukui, Akihiko, Hattori, Kohei, Hirano, Teruyuki, Kamizuka, Takafumi, Kashima, Shingo, Kawanaka, Norita, Kawashima, Yui, Klioner, Sergei A., Kodama, Takanori, Koshimoto, Naoki, Kotani, Takayuki, Kuzuhara, Masayuki, Levine, Stephen E., Majewski, Steven R., Masuda, Kento, Matsunaga, Noriyuki, Miyakawa, Kohei, Miyoshi, Makoko, Morihana, Kumiko, Nishi, Ryoichi, Notsu, Yuta, Omiya, Masashi, Sanders, Jason, Tanikawa, Ataru, Tsujimoto, Masahiro, Yano, Taihei, Aizawa, Masataka, Arimatsu, Ko, Biermann, Michael, Boehm, Celine, Chiba, Masashi, Debattista, Victor P., Gerhard, Ortwin, Hirabayashi, Masayuki, Hobbs, David, Ikenoue, Bungo, Izumiura, Hideyuki, Jordi, Carme, Kohara, Naoki, Löffler, Wolfgang, Luri, Xavier, Mase, Ichiro, Miglio, Andrea, Mitsuda, Kazuhisa, Newswander, Trent, Nishiyama, Shogo, Obuchi, Yoshiyuki, Ootsubo, Takafumi, Ouchi, Masami, Ozaki, Masanobu, Perryman, Michael, Prusti, Timo, Ramos, Pau, Read, Justin I., Rich, R. Michael, Schönrich, Ralph, Shikauchi, Minori, Shimizu, Risa, Suematsu, Yoshinori, Tada, Shotaro, Takahashi, Aoi, Tatekawa, Takayuki, Tatsumi, Daisuke, Tsujimoto, Takuji, Tsuzuki, Toshihiro, Urakawa, Seitaro, Uraguchi, Fumihiro, Utsunomiya, Shin, Van Eylen, Vincent, van Leeuwen, Floor, Wada, Takehiko, Walton, Nicholas A.
Japan Astrometry Satellite Mission for INfrared Exploration (JASMINE) is a planned M-class science space mission by the Institute of Space and Astronautical Science, the Japan Aerospace Exploration Agency. JASMINE has two main science goals. One is t
Externí odkaz:
http://arxiv.org/abs/2307.05666
We examine the Galactic warp in a sample of all classical Cepheids with Gaia DR3 radial velocity. In each radial bin, we determine (1) the inclined plane normal to the mean orbital angular momentum of the stars and (2) that best fitting their positio
Externí odkaz:
http://arxiv.org/abs/2305.09343
We describe methods to measure simultaneously the orientation angle $\psi$ and pattern speed $\Omega$ from single snapshots of simulated barred galaxies. Unlike previous attempts, our approach is unbiased, precise, and consistent in the sense that $\
Externí odkaz:
http://arxiv.org/abs/2211.00674
The angular-momentum distribution of classical Cepheids in the outer Milky Way disc is bi-modal with a gap at $L_\mathrm{gap}=2950\,\mathrm{km}\,\mathrm{s}^{-1}\,\mathrm{kpc}$, corresponding to $R=13\,\mathrm{kpc}$, while no similar feature has been
Externí odkaz:
http://arxiv.org/abs/2210.11964
We analyse the distribution of Mira variable stars in the central region of the Milky Way. We find that with increasing period, i.e. decreasing age, the Miras shift towards negative Galactic longitudes $\ell$. Comparing to a cosmological zoom simulat
Externí odkaz:
http://arxiv.org/abs/2206.04535