Zobrazeno 1 - 10
of 277
pro vyhledávání: '"Martin, N. F."'
Autor:
Sitnova, T. M., Matsuno, T., Yuan, Z., Martin, N. F., Banerjee, P., Sestito, F., Venn, K. A., Hernández, J. I. González
We report the serendipitous discovery of a very metal-poor (VMP) Li-rich giant star ($T_{\rm eff}$ = 4690$\pm$80 K, log g = 1.34$\pm$0.13, [Fe/H] = $-2.43\pm$0.07). We analyse the Li I 6103 and 6707 \r{A} lines accounting for departures from local th
Externí odkaz:
http://arxiv.org/abs/2310.07907
Autor:
Mashonkina, L., Arentsen, A., Aguado, D. S., Smogorzhevskii, A., Hampel, M., Karakas, A., Sestito, F., Martin, N. F., Venn, K. A., Hernández, J. I. González
Well-studied very metal-poor (VMP, [Fe/H] < -2 ) stars in the inner Galaxy are few in number, and they are of special interest because they are expected to be among the oldest stars in the MilkyWay. We present high-resolution spectroscopic follow-up
Externí odkaz:
http://arxiv.org/abs/2305.10717
Autor:
Pieres, A., Santiago, B. X., Drlica-Wagner, A., Bechtol, K., Marel, R. P. van der, Besla, G., Martin, N. F., Belokurov, V., Gallart, C., Martinez-Delgado, D., Marshall, J., Nöel, N. E. D., Majewski, S. R., Cioni, M.-R. L., Li, T. S., Hartley, W., Luque, E., Conn, B. C., Walker, A. R., Balbinot, E., Stringfellow, G. S., Olsen, K. A. G., Nidever, D., da Costa, L. N., Ogando, R., Maia, M., Neto, A. Fausti, Abbott, T. M. C., Abdalla, F. B., Allam, S., Annis, J., Benoit-Lévy, A., Rosell, A. Carnero, Kind, M. Carrasco, Carretero, J., Cunha, C. E., D'Andrea, C. B., Desai, S., Diehl, H. T., Doel, P., Flaugher, B., Fosalba, P., García-Bellido, J., Gruen, D., Gruendl, R. A., Gschwend, J., Gutierrez, G., Honscheid, K., James, D., Kuehn, K., Kuropatkin, N., Menanteau, F., Miquel, R., Plazas, A. A., Romer, A. K., Sako, M., Sanchez, E., Scarpine, V., Schubnell, M., Sevilla-Noarbe, I., Smith, R. C., Soares-Santos, M., Sobreira, F., Suchyta, E., Swanson, M. E. C., Tarle, G., Tucker, D. L., Wester, W.
We report the discovery of a stellar overdensity 8 degrees north of the centre of the Small Magellanic Cloud (SMC; Small Magellanic Cloud Northern Over-Density; SMCNOD), using data from the first 2 yr of the Dark Energy Survey (DES) and the first yea
Externí odkaz:
http://hdl.handle.net/10150/624062
http://arizona.openrepository.com/arizona/handle/10150/624062
http://arizona.openrepository.com/arizona/handle/10150/624062
Autor:
Lardo, C., Mashonkina, L., Jablonka, P., Bonifacio, P., Caffau, E., Aguado, D. S., Hernández, J. I. González, Sestito, F., Kielty, C. L., Venn, K. A., Hill, V., Starkenburg, E., Martin, N. F., Sitnova, T., Arentsen, A., Carlberg, R. G., Navarro, J. F., Kordopatis, G.
Elemental abundances of the most metal-poor stars reflect the conditions in the early Galaxy and the properties of the first stars. We present a spectroscopic follow-up of two ultra metal-poor stars ([Fe/H]<-4.0) identified by the survey {\em Pristin
Externí odkaz:
http://arxiv.org/abs/2109.14477
Autor:
Youakim, K., Starkenburg, E., Martin, N. F., Matijevic, G., Aguado, D. S., Prieto, C. Allende, Arentsen, A., Bonifacio, P., Carlberg, R. G., Hernández, J. I. González, Hill, V., Kordopatis, G., Lardo, C., Navarro, J. F., Jablonka, P., Janssen, R. Sánchez, Sestito, F., Thomas, G. F.
The Pristine survey uses narrow-band photometry to derive precise metallicities down to the extremely metal-poor regime ([Fe/H] < -3), and currently consists of over 4 million FGK-type stars over a sky area of $\sim 2~500\, \mathrm{deg}^2$. We focus
Externí odkaz:
http://arxiv.org/abs/2001.04988
Autor:
Li, T. S., Simon, J. D., Pace, A. B., Torrealba, G., Kuehn, K., Drlica-Wagner, A., Bechtol, K., Vivas, A. K., van der Marel, R. P., Wood, M., Yanny, B., Belokurov, V., Jethwa, P., Zucker, D. B., Lewis, G., Kron, R., Nidever, D. L., Sánchez-Conde, M. A., Ji, A. P., Conn, B. C., James, D. J., Martin, N. F., Martinez-Delgado, D., Noël, N. E. D.
We present Magellan/IMACS, Anglo-Australian Telescope/AAOmega+2dF, and Very Large Telescope/GIRAFFE+FLAMES spectroscopy of the CarinaII (Car II) & Carina III (Car III) dwarf galaxy candidates, recently discovered in the Magellanic Satellites Survey (
Externí odkaz:
http://arxiv.org/abs/1802.06810
Autor:
Bellazzini, M., Armillotta, L., Perina, S., Magrini, L., Cresci, G., Beccari, G., Battaglia, G., Fraternali, F., de Zeeuw, P. T., Martin, N. F., Calura, F., Ibata, R., Coccato, L., Testa, V., Correnti, M.
SECCO1 is an extremely dark, low-mass (M_star=10^5 M_sun), star-forming stellar system lying in the Low Velocity Cloud (LVC) substructure of the Virgo cluster of galaxies, and hosting several HII regions. Here we review our knowledge of this remarkab
Externí odkaz:
http://arxiv.org/abs/1802.05625
Autor:
Torrealba, G., Belokurov, V., Koposov, S. E., Bechtol, K., Drlica-Wagner, A., Olsen, K. A. G., Vivas, A. K., Yanny, B., Jethwa, P., Walker, A. R., Li, T. S., Allam, S., Conn, B. C., Gallart, C., Gruendl, R. A., James, D. J., Johnson, M. D., Kuehn, K., Kuropatkin, N., Martin, N. F., Martinez-Delgado, D., Nidever, D. L., Noël, N. E. D., Simon, J. D., Stringfellow, G. S., Tucker, D. L.
We report the discovery of two ultra-faint satellites in the vicinity of the Large Magellanic Cloud (LMC) in data from the Magellanic Satellites Survey (MagLiteS). Situated 18$^{\circ}$ ($\sim 20$ kpc) from the LMC and separated from each other by on
Externí odkaz:
http://arxiv.org/abs/1801.07279
Autor:
Youakim, K., Starkenburg, E., Aguado, D. S., Martin, N. F., Fouesneau, M., Hernández, J. I. González, Prieto, C. Allende, Bonifacio, P., Gentile, M., Kielty, C., Côté, P., Jablonka, P., McConnachie, A., Janssen, R. Sánchez, Tolstoy, E., Venn, K.
The Pristine survey is a narrow-band, photometric survey focused around the wavelength region of the Ca II H & K absorption lines, designed to efficiently search for extremely metal-poor stars. In this work, we use the first results of a medium-resol
Externí odkaz:
http://arxiv.org/abs/1708.01264
Autor:
Chambers, K. C., Magnier, E. A., Metcalfe, N., Flewelling, H. A., Huber, M. E., Waters, C. Z., Denneau, L., Draper, P. W., Farrow, D., Finkbeiner, D. P., Holmberg, C., Koppenhoefer, J., Price, P. A., Rest, A., Saglia, R. P., Schlafly, E. F., Smartt, S. J., Sweeney, W., Wainscoat, R. J., Burgett, W. S., Chastel, S., Grav, T., Heasley, J. N., Hodapp, K. W., Jedicke, R., Kaiser, N., Kudritzki, R. -P., Luppino, G. A., Lupton, R. H., Monet, D. G., Morgan, J. S., Onaka, P. M., Shiao, B., Stubbs, C. W., Tonry, J. L., White, R., Bañados, E., Bell, E. F., Bender, R., Bernard, E. J., Boegner, M., Boffi, F., Botticella, M. T., Calamida, A., Casertano, S., Chen, W. -P., Chen, X., Cole, S., Deacon, N., Frenk, C., Fitzsimmons, A., Gezari, S., Gibbs, V., Goessl, C., Goggia, T., Gourgue, R., Goldman, B., Grant, P., Grebel, E. K., Hambly, N. C., Hasinger, G., Heavens, A. F., Heckman, T. M., Henderson, R., Henning, T., Holman, M., Hopp, U., Ip, W. -H., Isani, S., Jackson, M., Keyes, C. D., Koekemoer, A. M., Kotak, R., Le, D., Liska, D., Long, K. S., Lucey, J. R., Liu, M., Martin, N. F., Masci, G., McLean, B., Mindel, E., Misra, P., Morganson, E., Murphy, D. N. A., Obaika, A., Narayan, G., Nieto-Santisteban, M. A., Norberg, P., Peacock, J. A., Pier, E. A., Postman, M., Primak, N., Rae, C., Rai, A., Riess, A., Riffeser, A., Rix, H. W., Röser, S., Russel, R., Rutz, L., Schilbach, E., Schultz, A. S. B., Scolnic, D., Strolger, L., Szalay, A., Seitz, S., Small, E., Smith, K. W., Soderblom, D. R., Taylor, P., Thomson, R., Taylor, A. N., Thakar, A. R., Thiel, J., Thilker, D., Unger, D., Urata, Y., Valenti, J., Wagner, J., Walder, T., Walter, F., Watters, S. P., Werner, S., Wood-Vasey, W. M., Wyse, R.
Pan-STARRS1 has carried out a set of distinct synoptic imaging sky surveys including the $3\pi$ Steradian Survey and the Medium Deep Survey in 5 bands ($grizy_{P1}$). The mean 5$\sigma$ point source limiting sensitivities in the stacked 3$\pi$ Sterad
Externí odkaz:
http://arxiv.org/abs/1612.05560