Results 31 to 40 of about 5,019,889 (353)
Local Distance Indicators [PDF]
Symposium - International Astronomical Union, 2005 A summary is given of the calibration of the Cepheid scale required in the derivation of distances from observations at V and I, as in the HST work on extragalactic Cepheids. There is some evidence that a small metallicity correction may be necessary in deriving distances in this way.
openaire +2 more sources
CEPHEIDS AS DISTANCE INDICATORS: SOME CURRENT PROBLEMS
Odessa Astronomical Publications, 2017 A general review is given of the calibration of the Cepheid distance scale, with particular reference to its use in the determination of H0. Emphasis is placed on the advantage of using a galactic calibration of the Cepheid scale, rather than relying on ...
M. Feast
doaj +1 more source
SELECTION OF DIGITAL TOOLS FOR ORGANIZING STUDENTS' GROUP WORK IN DISTANCE EDUCATION
Інформаційні технології і засоби навчання, 2023 The transformation of classical education into distance education has become increasingly relevant, especially given the challenging conditions posed by the COVID-19 pandemic and military operations in our country.
Olena G. Glazunova +3 more
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Spiral galaxy distance indicators based on near-infrared photometry [PDF]
, 1999 We compare two methods of distance determination to spiral galaxies using optical/near-infrared (NIR) observations, the (I-K) versus M_K colour - absolute magnitude (CM) relation and the I and K-band Tully-Fisher relation (TFR). Dust-free colours and NIR
de Grijs, R., Peletier, R. F.
core +5 more sources
AGB variables as distance indicators [PDF]
International Astronomical Union Colloquium, 2004 AbstractEvidence for the existence of Mira Period-Luminosity relations is reviewed including recent work on Miras with thick circumstellar shells. The calibration of the relation at K is discussed in detail. The nature of variables deviating from the PL relation and possible metallicity effects are also discussed.
openaire +2 more sources
The Astronomical Journal, 2023 The accuracy of stellar distances inferred purely from parallaxes degrades rapidly with distance. Proper motion measurements, when combined with some idea of typical velocities, provide independent information on stellar distances.
C. A. L. Bailer-Jones
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ASTROPHYSICAL TESTS OF MODIFIED GRAVITY: CONSTRAINTS FROM DISTANCE INDICATORS IN THE NEARBY UNIVERSE [PDF]
, 2012 We use distance measurements in the nearby universe to carry out new tests of gravity, surpassing other astrophysical tests by over two orders of magnitude for chameleon theories. The three nearby distance indicators—cepheids, tip of the red giant branch
B. Jain, V. Vikram, Jeremy Sakstein
semanticscholar +1 more source
Travel Matrix Decomposition for Understanding Spatial Long-Distance Travel Structure
Complexity, 2023 Mobile phone location data enable us to obtain accurate and temporally detailed long-distance travel distribution. However, the traditional long-distance travel distribution model cannot normally handle this detailed temporal information.
Hiromichi Yamaguchi +2 more
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The extragalactic distance scale. V - Tertiary distance indicators
The Astrophysical Journal, 1979 G. Vaucouleurs
semanticscholar +2 more sources
Open Praxis, 2023 Due to the forces of globalization, higher education institutions have increased their participation in international partnerships and the flow of academic services and resources across borders.
Rebecca E. Heiser
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