Zobrazeno 1 - 10
of 3 563
pro vyhledávání: '"Matsunaga N"'
Autor:
Saito, R. K., Hempel, M., Alonso-García, J., Lucas, P. W., Minniti, D., Alonso, S., Baravalle, L., Borissova, J., Caceres, C., Chené, A. N., Cross, N. J. G., Duplancic, F., Garro, E. R., Gómez, M., Ivanov, V. D., Kurtev, R., Luna, A., Majaess, D., Navarro, M. G., Pullen, J. B., Rejkuba, M., Sanders, J. L., Smith, L. C., Albino, P. H. C., Alonso, M. V., Amôres, E. B., Angeloni, R., Arias, J. I., Arnaboldi, M., Barbuy, B., Bayo, A., Beamin, J. C., Bedin, L. R., Bellini, A., Benjamin, R. A., Bica, E., Bonatto, C. J., Botan, E., Braga, V. F., Brown, D. A., Cabral, J. B., Camargo, D., Garatti, A. Caratti o, Carballo-Bello, J. A., Catelan, M., Chavero, C., Chijani, M. A., Clariá, J. J., Coldwell, G. V., Peña, C. Contreras, Ramos, R. Contreras, Corral-Santana, J. M., Cortés, C. C., Cortés-Contreras, M., Cruz, P., Daza-Perilla, I. V., Debattista, V. P., Dias, B., Donoso, L., D'Souza, R., Emerson, J. P., Federle, S., Fermiano, V., Fernandez, J., Fernández-Trincado, J. G., Ferreira, T., Lopes, C. E. Ferreira, Firpo, V., Flores-Quintana, C., Fraga, L., Froebrich, D., Galdeano, D., Gavignaud, I., Geisler, D., Gerhard, O. E., Gieren, W., Gonzalez, O. A., Gramajo, L. V., Gran, F., Granitto, P. M., Griggio, M., Guo, Z., Gurovich, S., Hilker, M., Jones, H. R. A., Kammers, R., Kuhn, M. A., Kumar, M. S . N., Kundu, R., Lares, M., Libralato, M., Lima, E., Maccarone, T. J., Cortés, P. Marchant, Martin, E. L., Masetti, N., Matsunaga, N., Mauro, F., McDonald, I., Mejías, A., Mesa, V., Milla-Castro, F. P., Minniti, J. H., Bidin, C. Moni, Montenegro, K., Morris, C., Motta, V., Navarete, F., Molina, C. Navarro, Nikzat, F., Castellón, J. L. Nilo, Obasi, C., Ortigoza-Urdaneta, M., Palma, T., Parisi, C., Ramírez, K. Pena, Pereyra, L., Perez, N., Petralia, I., Pichel, A., Pignata, G., Alegría, S. Ramírez, Rojas, A. F., Rojas, D., Roman-Lopes, A., Rovero, A. C., Saroon, S., Schmidt, E. O., Schröder, A. C., Schultheis, M., Sgró, M. A., Solano, E., Soto, M., Stecklum, B., Steeghs, D., Tamura, M., Tissera, P., Valcarce, A. A. R., Valotto, C. A., Vasquez, S., Villalon, C., Villanova, S., Cádiz, F. Vivanco, Bacigalupo, R. Zelada, Zijlstra, A., Zoccali, M.
Publikováno v:
A&A 689, A148 (2024)
The ESO public survey VISTA Variables in the V\'ia L\'actea (VVV) surveyed the inner Galactic bulge and the adjacent southern Galactic disk from $2009-2015$. Upon its conclusion, the complementary VVV eXtended (VVVX) survey has expanded both the temp
Externí odkaz:
http://arxiv.org/abs/2406.16646
Autor:
Di Criscienzo, M., Leccia, S., Braga, V., Musella, I., Bono, G., Dall'Ora, M., Fiorentino, G., Marconi, M., Molinaro, R., Ripepi, V., Girardi, L., Mazzi, A., Pastorelli, G., Trabucchi, M., Matsunaga, N., Monelli, M., Saha, A., Vivas, K., Sanchez, R. Zanmar
This work is part of VESTALE, a project initiated within the Rubin-LSST Cadence Strategy Optimization Process . Its goal is to explore the potential of Rubin-LSST observations aimed at the Galaxy's bulge (Bulge) for studying RR Lyrae stars (RRL). Obs
Externí odkaz:
http://arxiv.org/abs/2406.12488
Autor:
Minniti, D., Matsunaga, N., Fernandez-Trincado, J. G., Otsubo, S., Sarugaku, Y., Takeuchi, T., Katoh, H., Hamano, S., Ikeda, Y., Kawakita, H., Lucas, P. W., Smith, L. C., Petralia, I., Garro, E. R., Saito, R. K., Alonso-Garcia, J., Gomez, M., Navarro, M. G.
Context. The Galactic centre is hazardous for stellar clusters because of the strong tidal force. Supposedly, many clusters were destroyed and contributed stars to the crowded stellar field of the bulge and the nuclear stellar cluster. However, it is
Externí odkaz:
http://arxiv.org/abs/2312.16028
Autor:
Matsunaga, N., Taniguchi, D., Elgueta, S. S., Tsujimoto, T., Baba, J., McWilliam, A., Otsubo, S., Sarugaku, Y., Takeuchi, T., Katoh, H., Hamano, S., Ikeda, Y., Kawakita, H., Hull, C., Albarracin, R., Bono, G., D'Orazi, V.
Metallicity gradients refer to the sloped radial profile of metallicities of gas and stars and are commonly seen in disk galaxies. A well-defined metallicity gradient of the Galactic disk is observed particularly well with classical Cepheids, which a
Externí odkaz:
http://arxiv.org/abs/2308.02853
Autor:
da Silva, R., D'Orazi, V., Palla, M., Bono, G., Braga, V. F., Fabrizio, M., Lemasle, B., Spitoni, E., Matteucci, F., Jonsson, H., Kovtyukh, V., Magrini, L., Bergemann, M., Dall'Ora, M., Ferraro, I., Fiorentino, G., Francois, P., Iannicola, G., Inno, L., Kudritzki, R. -P., Matsunaga, N., Monelli, M., Nonino, M., Sneden, C., Storm, J., Thevenin, F., Tsujimoto, T., Zocchi, A.
Publikováno v:
A&A 678, A195 (2023)
Classical Cepheids (CCs) are solid distance indicators and tracers of young stellar populations. Our aim is to provide iron, oxygen, and sulfur abundances for the largest and most homogeneous sample of Galactic CCs ever analyzed. The current sample c
Externí odkaz:
http://arxiv.org/abs/2308.01928
Autor:
Kovtyukh, V., Lemasle, B., Nardetto, N., Bono, G., da Silva, R., Matsunaga, N., Yushchenko, A., Fukue, K., Grebel, E. K.
The technique of line depth ratios (LDR) is one of the methods to determine the effective temperature of a star. They are crucial in the spectroscopic studies of variable stars like Cepheids since no simultaneous photometry is usually available. A go
Externí odkaz:
http://arxiv.org/abs/2307.00341
Autor:
Elgueta, S. S., Matsunaga, N., Jian, M., Taniguchi, D., Kobayashi, N., Fukue, K., Hamano, S., Sameshima, H., Kondo, S., Arai, A., Ikeda, Y., Kawakita, H., Otsubo, S., Sarugaku, Y., Yasui, C., Tsujimoto, T.
Newly-developed spectrographs with increased resolving powers, particularly those covering the near-IR range, allow the characterization of more and more absorption lines in stellar spectra. This includes the identification and confirmation of absorp
Externí odkaz:
http://arxiv.org/abs/2307.00158
Autor:
da Silva, R., Crestani, J., Bono, G., Braga, V. F., D'Orazi, V., Lemasle, B., Bergemann, M., Dall'Ora, M., Fiorentino, G., François, P., Groenewegen, M. A. T., Inno, L., Kovtyukh, V., Kudritzki, R. -P., Matsunaga, N., Monelli, M., Pietrinferni, A., Porcelli, L., Storm, J., Tantalo, M., Thévénin, F.
Publikováno v:
A&A 661, A104 (2022)
Classical Cepheids are the most popular distance indicators and tracers of young stellar populations. The key advantage is that they are bright and they can be easily identified in Local Group and Local Volume galaxies. Their evolutionary and pulsati
Externí odkaz:
http://arxiv.org/abs/2202.07945
Autor:
Sinha, Tirthendu, Sharma, Saurabh, Panwar, Neelam, Matsunaga, N., Ogura, K., Kobayashi, N., Yadav, R. K., Ghosh, A., Pandey, R., Bisht, P. S.
We present the results from our time-series imaging data taken with the 1.3m Devasthal fast optical telescope and 0.81m Tenagara telescope in $V$, $R_{c}$, $I_{c}$ bands covering an area of $\sim18^\prime.4\times 18^\prime.4$ towards the star-forming
Externí odkaz:
http://arxiv.org/abs/2108.02107
Autor:
Fabrizio, M., Braga, V. F., Crestani, J., Bono, G., Ferraro, I., Fiorentino, G., Iannicola, G., Preston, G. W., Sneden, C., Thévenin, F., Altavilla, G., Chaboyer, B., Dall'Ora, M., da Silva, R., Grebel, E. K., Gilligan, C. K., Lala, H., Lemasle, B., Magurno, D., Marengo, M., Marinoni, S., Marrese, P. M., Martìnez-Vàzquez, C. E., Matsunaga, N., Monelli, M., Mullen, J. P., Neeley, J., Nonino, M., Prudil, Z., Salaris, M, Stetson, P. B., Valenti, E., Zoccali, M.
We discuss the largest and most homogeneous spectroscopic dataset of field RR Lyrae variables (RRLs) available to date. We estimated abundances using both high-resolution and low-resolution ({\Delta S} method) spectra for fundamental (RRab) and first
Externí odkaz:
http://arxiv.org/abs/2107.00919