scholarly journals New intrinsic-colour calibration for uvby-β photometry

New Astronomy ◽  
2010 ◽  
Vol 15 (5) ◽  
pp. 444-449 ◽  
Author(s):  
Yüksel Karataş ◽  
William J. Schuster
Keyword(s):  
Intrinsic Colour

Desiderata in connection by the calibration of the MK-system

1966 ◽  
Vol 24 ◽  
pp. 348-349
Author(s):  
Th. Schmidt-Kaler
Keyword(s):  
Absolute Magnitude ◽  
Review Article ◽  
Stellar Systems ◽  
Astronomical Data ◽  
Intrinsic Colour

This is only an informal remark about some difficulties I am worrying about.I have tried to recalibrate the MK system in terms of intrinsic colour (B–V)0and absolute magnitudeMv. The procedures used have been described in a review article by Voigt (Mitt. Astr. Ges.1963, p. 25–35), and the results for stars of the luminosity classes Ia-O,I and II have been given also in Blaauw's article on the calibration of luminosity criteria in vol. III (Basic Astronomical Data, p. 401) ofStars and Stellar Systems.

scholarly journals On the formation of massive galaxies: a simultaneous study of number density, size and intrinsic colour evolution in GOODS

2009 ◽  
Vol 396 (3) ◽  
pp. 1573-1578 ◽  
Author(s):  
Ignacio Ferreras ◽  
Thorsten Lisker ◽  
Anna Pasquali ◽  
Sadegh Khochfar ◽  
Sugata Kaviraj
Keyword(s):  
Number Density ◽  
Massive Galaxies ◽  
Simultaneous Study ◽  
Intrinsic Colour

Consumers’ attitude towards honey consumption for its health benefits: first insights from an econometric approach

2022 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Raffaele Zanchini ◽  
Simone Blanc ◽  
Liam Pippinato ◽  
Giuseppe Di Vita ◽  
Filippo Brun
Keyword(s):  
Health Benefits ◽  
Chi Square ◽  
Content Type ◽  
Support Tool ◽  
Organic Certification ◽  
Age Cohort ◽  
Good Nutrition ◽  
Therapeutic Properties ◽  
Econometric Approach ◽  
Intrinsic Colour

PurposeAs is well known, there are several aspects that characterise honey consumption and the reasons for purchasing it. Despite this, little attention has been paid to the drivers that move consumers towards the use of honey for its health benefits and therapeutic properties. The aim of this study is to define which drivers move the consumption of honey for its health benefits.Design/methodology/approachThe study, conducted on 640 Italian honey consumers, applied inferential tests (Chi-square) and an econometric model (logit regression), and showed that about 66% of the respondents stated that they consume honey for its health properties.FindingsThe main drivers of honey consumption are both among the intrinsic (Colour) and extrinsic (Origin and Organic certification) attributes of the product. What also emerges is that the propensity to consume honey for health purposes is influenced by the consumer characteristics and habits, such as Age cohort, Gender, BMI and Large retail buyer. Moreover, we observed that consumption is influenced by BMI but not by lifestyle characteristics such as sport and diet.Originality/valueThis study could be a support tool for policymakers who are interested in promoting good nutrition and improving public health, since there is great interest in the functional properties of foods and the need to enhance the value of products, while at the same time ensuring consumer protection.

Ultraviolet intrinsic colour indices of O- and B-type stars

1994 ◽  
Vol 3 (1-2) ◽  
Author(s):  
V. Bobinas ◽  
J. Sūdžius
Keyword(s):  
Intrinsic Colour ◽  
Colour Indices

50 shades of colour: how thickness, iron redox and manganese/antimony contents influence perceived and intrinsic colour in Roman glass

2020 ◽  
Vol 12 (6) ◽  
Author(s):  
Anne-Isabelle Bidegaray ◽  
Karin Nys ◽  
Alberta Silvestri ◽  
Peter Cosyns ◽  
Wendy Meulebroeck ◽  
...  
Keyword(s):  
Roman Glass ◽  
Iron Redox ◽  
Intrinsic Colour

scholarly journals Absolute Magnitudes and Intrinsic Colours of Non-Supergiant Be Stars

1982 ◽  
Vol 98 ◽  
pp. 33-36
Author(s):  
J. R. Kozok
Keyword(s):  
Absolute Magnitude ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Be Stars ◽  
Large Sample ◽  
Galactic Clusters ◽  
Absolute Magnitudes ◽  
Image Position ◽  
Intrinsic Colour

101 normal Be stars, probable members of 56 galactic clusters and OB-associations, and more than 20 extreme Be stars in the Large Magellanic Cloud were used to derive intrinsic colours of 09-B9 (III-V)e stars. Furthermore, the correlation between the intrinsic colour (U-B)0 and the absolute magnitude of non-supergiant Be stars was confirmed to be and The aim of the present investigation is to enlarge the basis for the determination of intrinsic colours and absolute magnitudes by providing a large sample from the southern sky.

scholarly journals Evidence for Transient Colour Changes of Algol in the Past

1989 ◽  
Vol 107 ◽  
pp. 372-372
Author(s):  
R.H. van Gent
Keyword(s):  
Small Scale ◽  
Mass Ratio ◽  
The Past ◽  
Colour Changes ◽  
Historical Times ◽  
Transient Events ◽  
Detached Binaries ◽  
Intrinsic Colour ◽  
Quiescent Stage ◽  
Rapid Mass

Most Algol-type variables are believed to be close, semi-detached binaries which have evolved from a rapid mass-transfer phase, which reversed the initial mass-ratio, to a relatively quiescent stage where only small-scale transient events perturb the dynamical and the photo-metrical properties of the system.Of all Algol-systems, only the prototype Algol (β Per) itself is bright enough to be traceable in astronomical records reaching back more than 2000 years. Evidence based on medieval stellar lists and 19th-century visual observations strongly suggest that the intrinsic colour of Algol has been subject to substantial variations within historical times. On a few occasions Algol was apparently observed as reddish, which is at variance with its present blue-white appearance (B-V = −0.05 to +0.10).

scholarly journals M82 - Tilt and Warp of its Principal Plane

1983 ◽  
Vol 100 ◽  
pp. 67-68
Author(s):  
P. Notni ◽  
W. Bronkalla
Keyword(s):  
Stellar Population ◽  
Scattered Light ◽  
Young Stars ◽  
Principal Plane ◽  
Degree Of Polarization ◽  
Population Synthesis ◽  
Main Plane ◽  
Ubv Photometry ◽  
Intrinsic Colour

The main plane of a late type galaxy is best determined by its population I components : young stars, gas and dust. In the case of M82 the determination of its principal plane is complicated by its very irregular appearance and the presence of scattered light. We have used three-colour UBV-photometry of this galaxy to determine the stellar population, using the extinction- free parameter Q = (U-B) − 0.65(B-V), and the extinction AB = 4 ((B-V) − (B-V)oo; (B-V)oo being the intrinsic colour of the population, taken, e.g. from population synthesis calculations. Corrections for scattered light were made using the degree of polarization as well as the excess ultraviolet light (see Notni and Bronkalla, 1983; Notni et al., 1981 for details).

A New Approach to the Determination of the Intrintic Colours of the Cepheid Variable Stars

1979 ◽  
Vol 46 ◽  
pp. 292-317 ◽  
Author(s):  
Gerald E. Kron ◽  
Franklin E. Roach
Keyword(s):  
Variable Stars ◽  
New Approach ◽  
Cepheid Variables ◽  
Intrinsic Colour

SummaryIntrinsic colours have been determined for 247 of the 275 variable stars listed in the “Catalogue of the Light and Colour Curves of Cepheids in the UBV System” by N. Nikolov. Algorithms for computing intrinsic colour are derived from 59 standard stars. The intrinsic colours of the standards were derived from four sets of data from colour excesses deemed reliable in four references. The colours of the standard stars indicate a need for revival of Eggen’s concept of discretee classes of Cepheid Variables. A new principle of least reddening is used to improve the accuracy of the intrinsic colours of normal supergiants, where these are needed, and to test our derived colour excesses for the 247 Cepheids.

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