Results 151 to 160 of about 1,730 (181)

Clinical and molecular characterization of NDM-9 and NDM-13 producing multidrug-resistant Escherichia coli strains in China. [PDF]

BMC Microbiol
Tao J, Li G, Zhu Z, Zhu J, Wang W, Fu H, Yv H, Shan B, Wang L, Tang Y, Chen L, Du H, Jia W.   +12 more
europepmc   +1 more source

Spatial clustering and transmission networks of multidrug-resistant tuberculosis in Rwanda: a national retrospective genomic and spatial epidemiological study. [PDF]

BMJ Open
Cuella-Martin I, Hakizayezu F, Mulders W, Niyompano H, Runyambo D, Keysers J, De Rijk WB, Habimana Mucyo Y, Migambi P, Muvunyi CM, Meehan CJ, de Jong BC, Rigouts L, Ngabonziza JCS, Mitchell E.   +14 more
europepmc   +1 more source

INSIGHTS INTO THE CEPHEID DISTANCE SCALE [PDF]

Astrophysical Journal, 2010
We present an investigation of Cepheid distances using theory and observations. Cepheid models indicate that the slope of the Period-Luminosity (P-L) relation covering the entire period range (0.40<= logP <=2.0) becomes steeper when moving from optical to NIR bands, and that the metallicity dependence of the slope decreases from the B- to the K ...
Ilaria Musella, Marcella Marconi, Giuseppe Bono   +2 more
exaly   +4 more sources

Some of the next articles are maybe not open access.

Related searches:

Cepheids As Distance Indicators

Annual Review of Astronomy and Astrophysics, 1987
This review attempts to summarize the various ways of determining Cepheid reddenings and luminosities and the zero points of the Cepheid period-luminosity and period-luminosity-color relations. The methods of determining luminosities that are discussed involve Cepheid parallaxes, Cepheid proper motions and radial velocities, Cepheids in clusters and ...
M. W. Feast, A. R. Walker
openaire   +2 more sources

THE CEPHEID DISTANCE SCALE

Publications of the Astronomical Society of the Pacific, 1991
Developments concerning the period-luminosity (PL) relation for classical Cepheids are discussed with particular emphasis on the fact that Cepheids continue to provide the most homogeneous and reliable set of distances to many nearby galaxies. Observational programs relating to extragalactic Cepheids are also reviewed, and new distances and reddenings ...
Wendy Freedman
exaly   +2 more sources

A Revised Cepheid Distance to NGC 4258 and a Test of the Distance Scale

Astrophysical Journal, 2001
26 pages in emulateapj5 format, including 6 figures and 5 tables.
Wendy Freedman
exaly   +3 more sources

Cepheids and the Distance Ladder [PDF]

, 2016
Classical Cepheids plays a key role in the calibration of the extragalactic distance scale. In spite of their importance, some uncertainties related to their properties remain. In particular, a general consensus on the possible dependence on the metallicity of the host galaxy of the Cepheid properties has not been reached yet. These uncertainties could
openaire   +1 more source

Tuning the Cepheid distance scale

Publications of the Astronomical Society of the Pacific, 1992
Ongoing observational programs (both from the ground and space) will provide a significantly larger sample of galaxies with well-studied Cepheids both within the Local Group and in more distant galaxies. Recent efforts in the calibration of the Cepheid distance scale utilizing Cepheids in star clusters in the Galaxy and in the Magellanic Clouds are ...
openaire   +1 more source

Rebuilding the Cepheid Distance Scale. I. A Global Analysis of Cepheid Mean Magnitudes

Astrophysical Journal, 1997
54 pages, 7 figures, 4 tables, submitted to ...
exaly   +3 more sources

Cepheid distance to the virgo cluster

Pramana, 1999
HST data on Cepheid variables in one Virgo Cluster spiral galaxy is re-analyzed, taking into account flux-limited incompleteness in the sample and calibration of the period-luminosity relation in the relevant period range. Distance to the Virgo Cluster is estimated to be 19.6 ± 1.7 (random) ± 2.6 (systematic) Mpc.
openaire   +1 more source