Results 61 to 70 of about 1,034,573 (296)

Observing the First Stars and Black Holes

, 2008
The high sensitivity of JWST will open a new window on the end of the cosmological dark ages. Small stellar clusters, with a stellar mass of several 10^6 M_sun, and low-mass black holes (BHs), with a mass of several 10^5 M_sun should be directly ...
A. Ferrara, A. Gabasch, A. Heger, A. Heger, A. Lidz, A. Mesinger, A. Mesinger, A. Mesinger, A. Mesinger, A. Mesinger, A. Slosar, A. Sokasian, A. Tasitsiomi, A.A. Thoul, A.E. Shapley, A.G. Riess, A.J. Bunker, A.S. Fruchter, B. Ciardi, B. Ciardi, B. Leibundgut, B.W. O’Shea, B.W. O’Shea, C. Hernández-Monteagudo, C. Hernández-Monteagudo, C.L. Bennett, D. Richardson, D. Schaerer, D. Whalen, D.N. Spergel, D.N. Spergel, D.N. Spergel, D.Q. Lamb, D.R. Garnett, E. Baron, E. Cappellaro, E.R. Stanway, E.R. Stanway, F. Patat, F. Walter, F. Walter, G. Efstathiou, G. Lodato, G.L. Bryan, H. Susa, I.T. Iliev, I.T. Iliev, I.T. Iliev, J. Goodman, J. Hjörth, J. Miralda-Escudé, J. Miralda-Escudé, J. Silk, J. Tumlinson, J. Tumlinson, J.B. Doggett, J.B. Dove, J.H. Wise, J.H. Wise, J.L. Johnson, J.S. Bloom, J.S.B. Wyithe, J.S.B. Wyithe, J.S.B. Wyithe, K. Ahn, K. Basu, K. Omukai, K. Wood, K.L. Adelberger, K.Z. Stanek, L. Gao, L. Page, L. Strolger, M. Begelman, M. Dickinson, M. Dijkstra, M. Dijkstra, M. Elvis, M. Fukugita, M. Giavalisco, M. Hamuy, M. Kaplinghat, M. Kuhlen, M. McQuinn, M. Ricotti, M. Ricotti, M. Tegmark, M. Viel, M. Volonteri, M.-M. MacLow, M.A. Fardal, M.E. Machacek, M.E. Machacek, M.G. Santos, N. Kashikawa, N. Kawai, N. Yoshida, N. Yoshida, N. Yoshida, N. Yoshida, N.A. Bahcall, N.Y. Gnedin, N.Y. Gnedin, P. Bode, P. Garnavich, P. Madau, P. Madau, P.J.E. Peebles, P.R. Shapiro, P.R. Shapiro, P.R. Shapiro, R. Barkana, R. Barkana, R. Cen, R. Cen, R. Cen, R. Kramer, R. Kramer, R. Salvaterra, R.A.M.J. Wijers, R.H. Becker, R.J. Bouwens, R.J. Nemiroff, R.J. Weymann, R.K. Sheth, R.M. Thomas, R.S. Somerville, S. Furlanetto, S. Malhotra, S. Malhotra, S. Perlmutter, S. Zaroubi, S.C.O. Glover, S.J. Lilly, S.P. Oh, S.P. Oh, S.P. Oh, S.P. Oh, S.R. Furlanetto, S.R. Furlanetto, T. Abel, T. Dahlén, T. Kitayama, T. Totani, T. Totani, T.H. Greif, T.R. Choudhury, V. Bromm, V. Bromm, V. Bromm, V. Bromm, V. Bromm, V. Springel, W. Hu, W.C. Saslaw, W.H. Press, X. Fan, X. Fan, X. Fan, X. Fan, X. Fan, X. Fan, Y. Matsuda, Y. Taniguchi, Y. Yang, Z. Haiman, Z. Haiman, Z. Haiman, Z. Haiman, Z. Haiman, Z. Haiman, Z. Haiman, Z. Haiman, Z. Haiman   +173 more
core   +1 more source

Photometric Variability in Kepler Target Stars: The Sun Among Stars -- A First Look [PDF]

, 2010
The Kepler mission provides an exciting opportunity to study the lightcurves of stars with unprecedented precision and continuity of coverage. This is the first look at a large sample of stars with photometric data of a quality that has heretofore been ...
Basri, Gibor, Batalha, Natalie, Borucki, William J., Brown, Tim, Caldwell, Doug, Dupree, Andrea K., Gilliland, Ronald L., Howell, Steve, Jenkins, Jon, Koch, David, Latham, David W., Meibom, Soeren, Walkowicz, Lucianne M.   +12 more
core   +1 more source

First stars IV: Summary talk [PDF]

AIP Conference Proceedings, 2012
The paper contains the summary of the First Stars IV 2012 Conference held in Kyoto ...
openaire   +2 more sources

Financial Burden Associated With Hospitalisation Among Families of Childhood Brain Tumours in Australia

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Families of children with cancer experience significant financial strain, even with universal healthcare. Indirect costs, such as productivity losses and non‐medical expenses, are rarely included in economic evaluations, and little is known about how effectively financial aid programmes alleviate this burden. Childhood brain tumours
Megumi Lim, Natalie Bradford, David Brain, Sameera Senanayake, Sanjeewa Kularatna, Kate Young, Christine Cashion, Tim Hassall, Susanna Cramb   +8 more
wiley   +1 more source

Carbon measurements in two ultra-faint dwarf galaxies: Grus II and Tucana IV

Astronomy & Astrophysics
The ultra-faint dwarf galaxies (UFDs) are some of the oldest and most metal-poor environments in the Local Group. In particular, they are predicted to host the first stars (only H and He) that lit up in our Universe.
Verdiani Valentina, Skúladóttir Ása, Lucchesi Romain, Mucciarelli Alessio, Massari Davide, Battaglia Giuseppina, María Arroyo-Polonio José, Tolstoy Eline, Covella Sara, Taibi Salvatore   +9 more
doaj   +1 more source

First Stars. II. Evolution with mass loss

, 2011
The first stars are assumed to be predominantly massive. Although, due to the low initial abundances of heavy elements the line-driven stellar winds are supposed to be inefficient in the first stars, these stars may loose a significant amount of their ...
A. Heger, A. Heger, A. Heger, A. Maeder, A. Maeder, A. Maeder, A. Maeder, A. Maeder, A. Stacy, A. ud-Doula, A.J. Marle van, A.J. Marle van, C. Leitherer, D. Bahena, D. Bahena, D. Reimers, D. Reimers, F. Nakamura, G. Cescutti, G. Gräfener, G. Meynet, G. Meynet, G. Meynet, G. Meynet, G. Meynet, G. Meynet, H. Umeda, H. Umeda, H. Umeda, H.J.G.L.M. Lamers, I. Baraffe, J. Klapp, J. Krtička, J. Krtička, J. Krtička, J. Krtička, J. Krtička, J. Mackey, J. Puls, J. Tumlinson, J.I. Castor, J.S. Vink, J.S. Vink, J.S. Vink, J.S. Vink, K. Nomoto, K. Omukai, K. Omukai, K.P. Schröder, L.B. Lucy, M.J. Barlow, N. Smith, P. Hadrava, R. Hirschi, R. Schneider, R. Schneider, R.P. Kudritzki, S. Cassisi, T. Abel, T. Nakamura, T.C. Beers, V. Bromm, V. Bromm, V. Bromm, V. Castellani, V.V. Dwarkadas   +65 more
core   +1 more source

The Ionizing Efficiency of the First Stars [PDF]

, 2003
We investigate whether a single population of first stars could have influenced both the metal enrichment and reionization of the high-redshift intergalactic medium (IGM), by calculating the generated ionizing radiation per unit metal yield as a function
Truran, James W., Venkatesan, Aparna
core   +3 more sources

Excavation of the First Stars

The Astrophysical Journal, 2003
The external pollution of the first stars in the Galaxy is investigated. The first stars were born in clouds composed of the pristine gas without heavy elements. These stars accreted gas polluted with heavy elements while they still remained in the cloud. As a result, it is found that they exhibit a distribution with respect to the surface metallicity.
Shigeyama, Toshikazu, Tsujimoto, Takuji, Yoshii, Yuzuru   +2 more
openaire   +2 more sources

CLOSE BINARY SYSTEMS ON LATE EVOLUTIONARY STAGES

Odessa Astronomical Publications, 2017
Observational and theoretical progress in investigations of close binary stars allow to understand the nature and evolution of many types of close binary systems containing peculiar components: Wolf-Rayet stars, white dwarfs neutron stars and black holes.
A. M. Cherepashchuk
doaj   +1 more source

The oldest stars of the bulge: new information on the ancient Galaxy

, 2017
Recently the search for the oldest stars have started to focus on the Bulge region. The Galactic bulge hosts extremely old stars, with ages compatible with the ages of the oldest halo stars.
Cescutti, Gabriele, Chiappini, Cristina, Hirschi, Raphael   +2 more
core   +1 more source