Results 101 to 110 of about 205,088 (284)

Nebular abundances in galaxies: Beware of biases [PDF]

Proceedings of the International Astronomical Union, 2009
AbstractThe derivation of nebular abundances in galaxies using strong line methods is simple and quick. Various indices have been designed and calibrated for this purpose, and they are widely used. However, abundances derived with such methods may be significantly biased, if the objects under study have different structural properties (hardness of the ...
openaire   +3 more sources

The abundance of interstellar chlorine in the galaxy [PDF]

Monthly Notices of the Royal Astronomical Society, 1984
Des largeurs equivalentes nouvellement deduites de spectres IUE ont ete combinees a des largeurs equivalentes de Copernicus pour evaluer les abondances interstellaires du chlore pour plus de 40 lignes de visee galactiques. L'abondance presente une decroissance marquee avec l'augmentation de n(H) suivant la relation approchee a(Cl)≃4,9-0,3 log [n(H) cm −
A. W. Harris, G. E. Bromage
openaire   +2 more sources

Gut Mycobiota of Three Rhinopithecus Species Provide New Insights Into the Association Between Diet and Environment

Integrative Zoology, EarlyView.
This study revealed the basic structures of gut mycobiota of three wild Rhinopithecus species. The gut mycobiota of Rhinopithecus showed close connection with their feeding habits, and there were associations between gut mycobiota and the host's living environments.
Xuanyi Yang, Xiaochen Wang, Mingyi Zhang, Ying Shen, Yang Teng, Ming Li, Huijuan Pan   +6 more
wiley   +1 more source

Aperture and Resolution Effects on Ultraviolet Star-forming Properties: Insights from Local Galaxies and Implications for High-redshift Observations

The Astrophysical Journal
We present an analysis of the effects of spectral resolution and aperture scale on derived galaxy properties using far-ultraviolet (FUV) spectra of local star-forming galaxies from the International Ultraviolet Explorer ( R ∼ 250, field of view (FOV ...
Ilyse Clark, Danielle A. Berg, Claus Leitherer, Karla Z. Arellano-Córdova, Andreas A. C. Sander   +4 more
doaj   +1 more source

Spectroscopic observations of a sample of dwarf spirals galaxies. I.Oxygen abundances [PDF]

arXiv, 2010
The oxygen abundances for four dwarf spiral galaxies have been determined using long-slit spectroscopy. The abundances of these galaxies have not previously reported in the literature. Several HII regions were detected in each galaxy. The electronic temperature method could be used only in one region because of the lack of the auroral lines of oxygen ...
arxiv  

The building up of the disk galaxy M33 and the evolution of the metallicity gradient

, 2007
The evolution of radial gradients of metallicity in disk galaxies and its relation with the disk formation are not well understood. Theoretical models of galactic chemical evolution make contrasting predictions about the time evolution of metallicity ...
Aller, Arnett, Aubert, Beaulieu, Block, Block, Brooks, Bullock, Chabrier, Chang, Chiappini, Chiappini, Chiappini, Chieffi, Ciardullo, Ciardullo, Corbelli, Corbelli, Crockett, D. Galli, Davidge, de Boer, Devereux, Diaz, E. Corbelli, Elmegreen, Engargiola, Ferrini, Ferrini, Ferrini, Ferrini, Freedman, Freeman, Friel, Gallagher, Galletti, Garnett, Gavilán, Goetz, Henry, Henry, Henry, Herrero, Herwig, Heyer, Hippelein, Hirschi, Holmberg, Hoopes, Hou, Israel, Kennicutt, Kennicutt, Kennicutt, Keres, Kim, Koeppen, Kroupa, Kroupa, Kwitter, L. Magrini, Maciel, Maciel, Maciel, Maciel, Magrini, Magrini, Magrini, Marigo, McCarthy, McConnachie, Mollà, Mollà, Mollà, Monteverde, Monteverde, Naab, Newton, Portinari, Portinari, Regan, Richer, Romano, Rowe, Salpeter, Sandage, Scalo, Scalo, Smith, Stanghellini, Stephens, Talbot, Thielemann, Tiede, Tinsley, Tosi, Urbaneja, Venn, Vílchez, Wakker, Westmeier, Willner, Woosley, Wyse, Young   +104 more
core   +1 more source

Spatial Dynamics and Lifespan of Adult Cicadas After Fire and Logging: A Radiotracking Study

Integrative Zoology, EarlyView.
This study investigates the effects of wildfire and post‐fire salvage logging on the survival, spatial behavior, and habitat selection of Lyristes plebejus cicadas in Mediterranean pine forests. A total of 63 cicadas were captured, tagged with radio transmitters, and released in three disturbance contexts: burnt‐logged, burnt‐unlogged, and unburnt ...
Carles Tobella, Marc Franch, Josep M. Bas, Lluís Brotons, Pere Pons   +4 more
wiley   +1 more source

Stellar Mergers or Truly Young? Intermediate-age Stars on Highly Radial Orbits in the Milky Way’s Stellar Halo

The Astrophysical Journal
Reconstructing the mass assembly history of the Milky Way relies on obtaining detailed measurements of the properties of many stars in the galaxy, especially in the stellar halo.
Danny Horta, Yuxi (Lucy) Lu, Melissa K. Ness, Mariangela Lisanti, Adrian M. Price-Whelan   +4 more
doaj   +1 more source

Starbursts and High-Redshift Galaxies are Radioactive: High Abundances of $^{26}$Al and Other Short Lived Radionuclides

, 2014
Short lived radionuclides (SLRs) like $^{26}$Al are synthesized by massive stars and are a byproduct of star formation. The abundances of SLRs in the gas of a star-forming galaxy are inversely proportional to the gas consumption time. The rapid evolution
Ackermann, Adams, Arnould, Batejat, Beacom, Bergin, Bertoldi, Beswick, Bigiel, Boggs, Boss, Boss, Brian C. Lacki, Brinchmann, Busso, Cameron, Cameron, Caselli, Cerviño, Chevalier, Chevalier, Clayton, Crocker, Daddi, Daddi, de Avillez, Diehl, Diehl, Downes, Elmegreen, Elmegreen, Fatuzzo, Finocchi, Förster, Gammie, Genzel, Genzel, Gilmour, González, Gounelle, Gounelle, Gounelle, Green, Greiner, Grimm, Gritschneder, Guessoum, Harris, Harrison, Haywood, Heckman, Higdon, Holmberg, Hooper, Hopkins, Hopkins, Hopkins, Huss, Hutcheon, Jean, Karim, Kennicutt, Knödlseder, Kobulnicky, Kretschmer, Lacki, Lacki, Launhardt, Lee, Lee, Leitherer, Lilly, Limongi, Mac, MacPherson, Magnelli, Mahoney, Makide, Martin, Martin, Mayya, McKee, McKee, Mestel, Meyer, Molinari, Moskalenko, Mouschovias, Naya, Noeske, Palacios, Pan, Pan, Papadopoulos, Pierce-Price, Prantzos, Prantzos, Preibisch, Rahman, Rodighiero, Rodríguez-Merino, Roy, Saintonge, Sanders, Sargent, Satyapal, Schlickeiser, Shukolyukov, Silich, Silich, Smith, Smith, Stepinski, Strickland, Strickland, Suchkov, Tacconi, Tacconi, Thompson, Thompson, Thornton, Twarog, Umebayashi, Umebayashi, Vasileiadis, Villeneuve, Voss, Wang, Weiß, Williams, Wuyts   +130 more
core   +1 more source

Characterization of Human Senescent Cell Biomarkers for Clinical Trials

Aging Cell, EarlyView.
Assessment of T‐cell p16_variant 5 expression may be useful for selecting participants in clinical trials of senolytics. We further characterize p16_variant 5 expression in the context of senescence and demonstrate that correlated plasma senescence‐associated secretory phenotype factors could be used in lieu of the technically challenging T‐cell ...
Joshua N. Farr, David G. Monroe, Elizabeth J. Atkinson, Mitchell N. Froemming, Ming Ruan, Nathan K. LeBrasseur, Sundeep Khosla   +6 more
wiley   +1 more source