Results 81 to 90 of about 290,159 (343)

The origin of carbon: Low-mass stars and an evolving, initially top-heavy IMF?

, 2010
Multi-zone chemical evolution models (CEMs), differing in the nucleosynthesis prescriptions (yields) and prescriptions of star formation, have been computed for the Milky Way. All models fit the observed O/H and Fe/H gradients well and reproduce the main
Andrievsky, Andrievsky, Andrievsky, Andrievsky, Asplund, Bensby, Bergvall, Blöcker, Boissier, Burbidge, Carigi, Cayrel, Chiappini, Chiappini, Chiappini, Chiappini, Chiappini, Chieffi, Chiosi, Davé, Dearborn, Ecuvillon, Edvardsson, Elmegreen, Esteban, Esteban, Fabbian, Fabbian, Fabbian, Feltzing, Fuchs, Garnett, Garnett, Gavilán, Gratton, Greggio, Gustafsson, Helmi, Holmberg, Hubble, Israelian, Izotov, Izzard, Jonsell, Karakas, Karlsson, Karlsson, Kennicutt, Kobulnicky, Kunth, L. Mattsson, Lacey, Larson, Larson, Luck, Luck, Maeder, Marigo, Marigo, Matteucci, Matteucci, Mattsson, Mattsson, Melndez, Meynet, Meynet, Meynet, Nordström, Ohja, Porcel, Portinari, Preston, Renda, Renzini, Ruphy, Salpeter, Salpeter, Scalo, Schaller, Sofue, Spite, Talbot, Talbot, Telles, Timmes, Tumlinson, van den Hoek, van Dokkum, Wilson, Woosley, Wyse, Wyse   +91 more
core   +1 more source

Keck spectroscopy and Spitzer Space Telescope analysis of the outer disk of the Triangulum Spiral Galaxy M33 [PDF]

, 2007
In an earlier study of the spiral galaxy M33, we photometrically identified arcs or outer spiral arms of intermediate age (0.6 Gyr - 2 Gyr) carbon stars precisely at the commencement of the HI-warp.
A. Stockton, Beaulieu, Bessell, Binney, Block, Block, Bouwens, Buchanan, C. E. Woodward, Considere, Cook, Corbelli, D. L. Block, Demers, Deul, E. F. Polomski, F. Combes, Fazio, Freedman, Frogel, G. Canalizo, G. G. Fazio, G. Worthey, Gehrz, Helou, I. Puerari, K. C. Freeman, Keres, Le Bertre, Li, Lin, Magrini, Massey, Mould, Oke, Puerari, R. D. Gehrz, R. Groess, Regan, Rieke, Rogstad, Rowe, Sancisi, Sheinis, T. H. Jarrett, Tsalmantza, Tsujimoto, Werner, Wilson, Wilson   +49 more
core   +3 more sources

A search for galactic carbon stars [PDF]

International Astronomical Union Colloquium, 1988
The carbon star is one of the best probes for the galactic study; (1)it is intrinsically bright (Mbol = − 2 to − 6) especially in the red and infrared wavelength regions,(2)it has spectral features readily detectable on objective prism plates due to their strong carbon molecular bands,(3)it is an evolved star distributed abundantly (∼1 star per square ...
openaire   +3 more sources

A nucleotide‐independent, pan‐RAS‐targeted DARPin elicits anti‐tumor activity in a multimodal manner

Molecular Oncology, EarlyView.
We report a Designed Ankyrin Repeat Protein that binds and inhibits RAS proteins, which serve as central cell signaling hubs and are essential for the progression of many cancers. Its unique feature is that it does not discriminate between different RAS isoforms or mutations and is capable of binding to RAS in both its active (GTP‐bound) and inactive ...
Jonas N. Kapp, Wouter P. R. Verdurmen, Jonas V. Schaefer, Kari Kopra, Gabriela Nagy‐Davidescu, Elodie Richard, Marie‐Julie Nokin, Patrick Ernst, Rastislav Tamaskovic, Martin Schwill, Ralph Degen, Claudia Scholl, David Santamaria, Andreas Plückthun   +13 more
wiley   +1 more source

Minimizing Star-spot Contamination of Exoplanet Transit Spectroscopy Using Alternate Normalization

The Astronomical Journal
Recently, M. H. Currie et al. (2023) simulated the detection of molecules in the atmospheres of temperate rocky exoplanets transiting nearby M-dwarf stars.
Drake Deming, Miles H. Currie, Victoria S. Meadows, Sarah Peacock   +3 more
doaj   +1 more source

ON EVOLUTIONARY STATUS OF STARS WITH THE R CrB PHENOMENON

Odessa Astronomical Publications, 2017
Two key features are important for understanding the evolution of stars with the R Coronae Borealis variability: the state of high mass loss rate and the carbon overabundance. The hydrogen deficiency is a consequence of these two characteristics.
A. E. Rosenbush
doaj   +1 more source

Wolf 1465: Not a Bright Dwarf Carbon Star

, 2018
Wolf 1465 has been suggested as a candidate for a bright dwarf carbon star.
Dimitriadis, Georgios, Margon, Bruce
core   +1 more source

Targeting carbonic anhydrase IX/XII prevents the anti‐ferroptotic effect of stromal lactic acid in prostate carcinoma

Molecular Oncology, EarlyView.
In prostate carcinoma, lactic acid, secreted by highly glycolytic cancer‐associated fibroblasts, is imported into tumor cells through the MCT1 transporter and prevents RSL3 and erastin‐induced ferroptosis (A). Targeting of carbonic anhydrase IX/XII, the main extracellular pH regulators, in tumor and stromal cells reduces microenvironmental acidosis and
Elisa Pardella, Giuseppina Comito, Luigi Ippolito, Erica Pranzini, Marta Iozzo, Giulia Gangarossa, Francesca Virgilio, Silvia Bua, Alessio Nocentini, Giada Sandrini, Nicla Lorito, Marina Bacci, Gabriella Nesi, Pietro Spatafora, Sergio Serni, Claudiu T. Supuran, Andrea Morandi, Paola Chiarugi, Elisa Giannoni   +18 more
wiley   +1 more source

Evidence for a companion to BM Gem, a silicate carbon star

, 2008
Balmer and Paschen continuum emission as well as Balmer series lines of P Cygni-type profile from H_gamma through H_23 are revealed in the violet spectra of BM Gem, a carbon star associated with an oxygen-rich circumstellar shell (`silicate carbon star')
Akito Tajitsu, Alcolea J., Alksnis A., Alksnis A., Barnbaum C., Beland S., Bun’ei Sato, Cernicharo J., Clayton G. C., Eiji Kambe, Engels D., Etsuji Watanabe, Gilra D. P., Groenewegen M. A. T., Harrington J. P., Heiles C., Hideyuki Izumiura, Hiroyasu Ando, Iye M., Kaifu N., Ki’ichi Okita, Knapp G. J., Kozo Sadakane, Kunio Noguchi, Lloyd-Evans T., Lloyd-Evans T., Masahide Takada‐Hidai, Michitoshi Yoshida, Nicolet B., Noguchi K., Noguchi K., Noguchi K., Ohnaka K., Olnon F. M., Pottasch S. R., Satoshi Honda, Satoshi Kawanomoto, Shane C. D., Sugimoto D., Voges W., Voges W., Wako Aoki, Warner B., Wataru Tanaka, Willems F. J., Yamamura I., Yamashita Y.   +46 more
core   +1 more source

Galactic R Coronae Borealis Stars: The C-2 Swan Bands, The Carbon Problem, And The C-12/C-13 Ratio [PDF]

, 2012
Observed spectra of R Coronae Borealis (RCB) and hydrogen-deficient carbon (HdC) stars are analyzed by synthesizing the C-2 Swan bands (1, 0), (0, 0), and (0, 1) using our detailed line list and the Uppsala model atmospheres.
Hema, B. P., Lambert, David L., Pandey, Gajendra   +2 more
core   +1 more source