Results 41 to 50 of about 516,433 (274)

High-Resolution Spectroscopy of Cool Carbon-Rich and Metal-Poor Star HD 209621

Open Astronomy, 2012
Element abundances for HD 209621 obtained earlier display significant discrepancies, especially in the case of CNO and neutron-capture elements. Therefore we performed a detailed analysis of chemical composition of this star using a new high-resolution ...
Matrozis E., Začs L., Barzdis A.
doaj   +1 more source

Viruses in aquatic ecosystems: important advancements of the last 20 years and prospects for the future in the field of microbial oceanography and limnology

Advances in Oceanography and Limnology, 2010
Over the last two decades, viruses in aquatic systems have been observed to modify, influence and control aquatic systems. Since the determination decades ago that viruses were abundant in aquatic ecosystems, researchers have demonstrated that viruses ...
Stéphan Jacquet, Takeshi Miki, Rachel Noble, Peter Peduzzi, Steven Wilhelm   +4 more
doaj   +1 more source

"Counterpart" method for abundance determinations in HII regions

, 2012
We suggest a new way of the determining abundances and electron temperatures in HII regions from strong emission lines. Our approach is based on the standard assumption that HII regions with similar intensities of strong emission lines have similar ...
Aggarwal, Alloin, Andrievsky, Andrievsky, Andrievsky, Andrievsky, Asplund, Baldwin, Bresolin, Bresolin, Bresolin, Bresolin, Bresolin, Bresolin, Bresolin, Campbell, Castellanos, Cid, de Blok, Dopita, Dufour, E. K. Grebel, Edlén, Esteban, Esteban, Ferguson, Fierro, French, Fricke, Froese, Galavís, García-Rojas, García-Rojas, García-Rojas, García-Rojas, Garnett, Garnett, Garnett, Goddard, González-Delgado, Guseva, Guseva, Guseva, Guseva, Guseva, Guseva, Guseva, Hawley, Henry, Hodge, Hudson, Hägele, Izotov, Izotov, Izotov, Izotov, Izotov, Izotov, Izotov, Izotov, Izotov, Izotov, Izotov, Izotov, Johansson, Kauffmann, Kehrig, Kehrig, Kennicutt, Kennicutt, Kewley, Kewley, Kewley, Kinkel, Kniazev, Kniazev, Kobulnicky, Kobulnicky, Kunth, Kwitter, L. Mattsson, L. S. Pilyugin, Lee, Lee, Lee, Lee, Lequeux, Luridiana, López-Sánchez, López-Sánchez, López-Sánchez, López-Sánchez, López-Sánchez, Maeder, Magrini, Mattsson, McCall, McGaugh, Melbourne, Melnick, Mendoza, Miller, Moustakas, Noeske, Pagel, Pagel, Pagel, Pagel, Pastoriza, Peimbert, Peimbert, Peimbert, Peimbert, Peimbert, Pettini, Peña, Peña-Guerrero, Pilyugin, Pilyugin, Pilyugin, Pilyugin, Pilyugin, Pilyugin, Pilyugin, Pilyugin, Pilyugin, Pilyugin, Pilyugin, Pilyugin, Popescu, Pradhan, Pustilnik, Pustilnik, Pustilnik, Pustilnik, Pustilnik, Pérez-Montero, Rayo, Rodríguez, Saviane, Sedwick, Skillman, Skillman, Skillman, Stanghellini, Stasińska, Stasińska, Stasińska, Stasińska, Storey, Tayal, Terlevich, Thuan, Thuan, Thuan, Torres-Peimbert, Tremonti, Tsamis, Tüllmann, van den, van Zee, van Zee, van Zee, van Zee, van Zee, Vila Costas, Vílchez, Vílchez, Webster, Wenåker, Williams, Yin, York, Zahid, Zaritsky, Zaritsky   +175 more
core   +1 more source

Automated spectroscopic abundances of A and F-type stars using echelle spectrographs I. Reduction of ELODIE spectra and method of abundance determination [PDF]

, 2001
This paper presents an automated method to determine detailed abundances for A and F-type stars. This method is applied on spectra taken with the ELODIE spectrograph. Since the standard reduction procedure of ELODIE is optimized to obtain accurate radial
Adelman, Anders, Baranne, Barnard, Barnard, Blackwell, Castelli, Chmielewski, D. Erspamer, Gigas, Gray, Grevesse, Hall, Hill, Horne, Irwin, Kupka, Kurucz, Kurucz, Lemke, Lemke, Norlén, P. North, Piskunov, Qiu, Rentzsch-Holm, Sauval, Takeda, Takeda, Valenti, Varenne   +30 more
core   +3 more sources

Chemical Analysis of the Brightest Star of the Cetus II Ultrafaint Dwarf Galaxy Candidate

The Astrophysical Journal, 2023
We present a detailed chemical abundance analysis of the brightest star in the ultrafaint dwarf (UFD) galaxy candidate Cetus II from high-resolution Magellan/MIKE spectra.
K. B. Webber, T. T. Hansen, J. L. Marshall, J. D. Simon, A. B. Pace, B. Mutlu-Pakdil, A. Drlica-Wagner, C. E. Martínez-Vázquez, M. Aguena, S. S. Allam, O. Alves, E. Bertin, D. Brooks, A. Carnero Rosell, J. Carretero, L. N. da Costa, J. De Vicente, P. Doel, I. Ferrero, D. Friedel, J. Frieman, J. García-Bellido, G. Giannini, D. Gruen, R. A. Gruendl, S. R. Hinton, D. L. Hollowood, K. Honscheid, K. Kuehn, J. Mena-Fernández, F. Menanteau, R. Miquel, R. L. C. Ogando, M. E. S. Pereira, A. Pieres, A. A. Plazas Malagón, E. Sanchez, B. Santiago, J. Allyn Smith, M. Smith, E. Suchyta, G. Tarle, C. To, N. Weaverdyck, B. Yanny   +44 more
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Ruthenium and hafnium abundances in giant and dwarf barium stars

, 2007
We present abundances for Ru and Hf, compare them to abundances of other heavy elements, and discuss the problems found in determining Ru and Hf abundances with laboratory gf-values in the spectra of barium stars.
Allen, Allen, Arlandini, Barbuy, Boyarchuk, Böhm-Vitense, Böhm-Vitense, Cayrel, D. M. Allen, Edvardsson, G. F. Porto de Mello, Gallino, Grevesse, Gustafsson, Hill, Honda, Jorissen, Kaufer, Lawler, Luck, Lundqvist, Masseron, Meléndez, North, Piskunov, Plez, Smiljanic, Smith, Sneden, Spite, Tomkin, Yushchenko   +31 more
core   +1 more source

Chemical sensitivity to the ratio of the cosmic-ray ionization rates of He and H2 in dense clouds [PDF]

, 2006
Aim: To determine whether or not gas-phase chemical models with homogeneous and time-independent physical conditions explain the many observed molecular abundances in astrophysical sources, it is crucial to estimate the uncertainties in the calculated ...
Baldwin, Bergin, Boger, Charnley, Dalgarno, E. Herbst, F. Selsis, G. Massacrier, Glassgold, Graedel, Herbst, Le Bourlot, Le Bourlot, Le Teuff, Lee, Pagani, Pineau des Forets, Shalabiea, Smith, Snell, Terzieva, V. Wakelam, Wakelam, Wakelam, Wakelam   +24 more
core   +3 more sources

Understanding the Chemical Evolution of Blue Edge-on Low Surface Brightness Galaxies

The Astrophysical Journal, 2023
We present a sample of 330 blue edge-on low surface brightness galaxies (ELSBGs). To understand the chemical evolution of ELSBGs, we derived the gas-phase abundance and the [ α /Fe] ratio.
Tian-wen Cao, Hong Wu, Gaspar Galaz, Venu M. Kalari, Cheng Cheng, Zi-Jian Li, Jun-feng Wang   +6 more
doaj   +1 more source

Determining solar abundances using helioseismology [PDF]

, 2006
The recent downward revision of solar photospheric abundances of Oxygen and other heavy elements has resulted in serious discrepancies between solar models and solar structure as determined through helioseismology.
Antia H. M., Basu S., Basu S., Basu S., Eggleton P. P., Elliott J. R., Gough D. O., H. M. Antia, Sarbani Basu   +8 more
core   +2 more sources

Intravitreal GD2‐Specific Chimeric Antigen Receptor T‐Cell Therapy for Refractory Retinoblastoma

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Effective treatments for advanced, treatment‐resistant retinoblastoma (RB) remain limited. GD2‐specific chimeric antigen receptor (CAR) T cells show potent antitumor activity with minimal toxicity but have not previously been evaluated in RB.
Subongkoch Subhadhirasakul, Jatuporn Sujjitjoon, Pa‐thai Yenchitsomanus, Kridtin Jarutatsanangkoon, Ng Wei Loon, Kleebsabai Sanpakit, Jassada Buaboonnam, Chayamon Takpradit, Pornpimon Yuti, Nunghathai Sawasdee, Piriya Luangwattananun, Siripakorn Sangkitporn, Arnan Limmahachai, La‐ongsri Atchaneeyasakul   +13 more
wiley   +1 more source