Results 41 to 50 of about 11,210,903 (298)

Evolution and Nucleosynthesis of Primordial Low‐Mass Stars

The Astrophysical Journal, 2004
We discuss in detail the evolutionary properties of low mass stars M< 1 M(Solar) having metallicity lower than Z=10^(-6) from the pre- main sequence up to (almost) the end of the Asymptotic Giant Branch phase. We also discuss the possibility that the large [C,N/Fe] observed on the surface of the most Iron poor star presently known, HE0107-5240, may ...
I. PICARDI, A. CHIEFFI, M. LIMONGI, PISANTI, OFELIA, MIELE, GENNARO, G. MANGANO, O. STRANIERO, IMBRIANI, GIANLUCA   +7 more
openaire   +5 more sources

Tracing the Evolution of SMBHs and Stellar Objects in Galaxy Mergers: A Multi-mass Direct N-body Model

The Astrophysical Journal, 2023
By using direct N -body numerical simulations, we model the dynamical coevolution of two supermassive black holes (SMBHs) and the surrounding stars in merging galaxies. In order to investigate how different stellar components evolve during the merger, we
Shuo Li, Shiyan Zhong, Peter Berczik, Rainer Spurzem, Xian Chen, F. K. Liu   +5 more
doaj   +1 more source

The accretion/ejection paradigm of low mass stars tested with HST [PDF]

, 2019
Low-mass stars and brown dwarfs: IMF, accretion and activity ,Volterra, Italy, 17-20 October 2004In the last few years new investigation techniques have allowed us to study in depth the spectacular phenomenon of protostellar jets, and to test the ...
Coffey, Deirdre, Eislöffel, Jochen, Bacciotti, Francesca, Woitas, Jens, Ray, Thomas P.   +4 more
core   +1 more source

Facing the phase: Gravity-mode offset and buoyancy glitches in stars on the red-giant branch

Astronomy & Astrophysics
Context. With the increasing precision of asteroseismic observations, it becomes possible to reliably measure oscillation properties of an increasing number of stars. Interpreting these measurements requires a good theoretical understanding of their link
van Lier T., Müller J., Hekker S.
doaj   +1 more source

Zooming in on Individual Star Formation: Low- and High-Mass Stars [PDF]

Space Science Reviews, 2020
Star formation is a multi-scale, multi-physics problem ranging from the size scale of molecular clouds ($\sim$10s pc) down to the size scales of dense prestellar cores ($\sim$0.1 pc) that are the birth sites of stars. Several physical processes like turbulence, magnetic fields and stellar feedback, such as radiation pressure and outflows, are more or ...
Anna L. Rosen, Stella S. R. Offner, Sarah I. Sadavoy, Asmita Bhandare, Enrique Vázquez-Semadeni, Adam Ginsburg   +5 more
openaire   +2 more sources

European Standard Clinical Practice Guideline and EXPeRT Recommendations for the Diagnosis and Management of Gastroenteropancreatic Neuroendocrine Neoplasms in Children and Adolescents

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen, Calogero Virgone, Antje Redlich, Michael Abele, Ricardo Lopez‐Almaraz, Tal Ben‐Ami, Ewa Bien, Gianni Bisogno, Maja Mazic Cesen, Andrea Ferrari, Malgorzata A. Krawczyk, Yves Reguerre, Dominik T. Schneider, Ines B. Brecht, Charlotte Rigaud, Bilgehan Yalcin, Rainer Claus, Christian Vokuhl, Constantin Lapa, Jörg Fuchs, Segolene Hescot, Thomas Walter, Julien Hadoux, Daniel Orbach   +23 more
wiley   +1 more source

The mass-radius relationship for very low mass stars: Four new discoveries from the HATSouth Survey [PDF]

, 2013
We report the discovery of four transiting F-M binary systems with companions between 0.1 and 0.2 M☉ in mass by the HATSouth survey. These systems have been characterized via a global analysis of the HATSouth discovery data, combined with high-resolution
Schmidt, B, Penev, K, Schmidt B., Espinoza, N., Csak, B., Schmidt, B., Zhou G., Hartman J. D., Rabus M., Hartman, Joel D., Csubry Z., Tan, T. G., Penev K., Jordan, A, Bakos, Gaspar Aron, Espinoza, N, Mohler-Fischer M., Zhou, G, Mancini, L, Mancini, L., Henning, T., Csubry, Zoltan, Bayliss D., Penev, K., Rabus, M., Suc V., Bakos, Ga, Bakos G. A., Tan, Tg, Hartman, J. D., Csubry, Z, Ciceri S., Brahm R., Bayliss, D., Zhou, G., Csak, B, Csak B., Rabus, M, Ciceri, S., Espinoza N., Hartman, J D, Henning, T, Suc, V, Bakos, G Á, Csubry, Z., Bakos, G. Á., Tan T. G., Brahm, R, Mohler-Fischer, M, Henning T., Jordán, A., Brahm, R., Tan, T G, Jordan A., Mohler-Fischer, M., Hartman, Jd, Bayliss, D, Csák, Balázs, Ciceri, S, Mancini L., Suc, V.   +60 more
core   +1 more source

A deep HST view of the open cluster NGC2158: Binaries, mass functions, and M-dwarf discontinuity

Astronomy & Astrophysics
A significant fraction of stars in both the Galactic field and stellar clusters belong to binary systems. Understanding their properties is therefore fundamental for a comprehensive picture of stellar structure, stellar evolution, and cluster dynamics ...
Marchuk A. V., Muratore F., Milone A. P., Legnardi M. V., D’Antona F., Cordoni G., Mastrobuono-Battisti A., Bortolan E., Dell’Agli F., Dondoglio E., Lagioia E. P., Marino A. F., Tailo M., Ventura C., Ventura P., Ziliotto T.   +15 more
doaj   +1 more source

Solid Pseudopapillary Neoplasm of the Pancreas in Children and Adolescents: Expert Recommendations

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Solid pseudopapillary neoplasm of the pancreas (SPN) is a rare low‐grade malignant exocrine pancreatic tumor, mostly discovered during the second decade of life in females, with a very good prognosis, provided microscopically complete surgical excision is achieved.
Sabine Irtan, Michael Abele, Calogero Virgone, Michaela Kuhlen, Ricardo Lopez‐Almarez, Tal Ben‐Ami, Ewa Bien, Maja Cesen, Malgorzata A. Krawczyk, Andrea Ferrari, Gianni Bisogno, Yves Reguerre, Dominik T. Schneider, Louise Galmiche, Jorg Fuchs, Sarah Braungart, Bilgehan Yalcin, Ines B. Brecht, Daniel Orbach   +18 more
wiley   +1 more source

Mass-radius relation of low and very low-mass stars revisited with the VLTI [PDF]

, 2009
International audienceWe measured the radii of 7 low and very low-mass stars using long baseline interferometry with the VLTI interferometer and its VINCI and AMBER near-infrared recombiners.
Benisty, M., Delfosse, X., Queloz, D., X. Delfosse, B. Lopez, J.-L. Beuzit, E. Di Folco, M. Benisty, R. Petrov, J.-B. Le Bouquin, D. Queloz, Hofmann, K.-H., Lopez, B., D. Ségransan, Di Folco, E., Le Bouquin, J.-B., K.-H. Hofmann, Ségransan, D., Kervella, P., B.-O. Demory, P. Kervella, T. Forveille, Demory, B.-O., G. Duvert, Perrier, C., Forveille, T., Duvert, G., Petrov, R., Beuzit, J.-L., C. Perrier   +29 more
core   +1 more source