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  • 1
    Series available for loan
    Series available for loan
    The value of H O from the infrared tully-fisher relation (1987)
    Turku
    Associated volumes
    Details Availability
    Call number: S 90.0938(127)
    In: Report series
    Type of Medium: Series available for loan
    Pages: 16 S.
    ISBN: 951880043X
    Series Statement: Report series / Department of Physical Sciences, University of Turku 127
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 2
    Series available for loan
    Series available for loan
    Data for the study of galactic rotation at R〈R O using Xi vs. sin²1 diagrams (1987)
    Turku
    Associated volumes
    Details Availability
    Call number: S 90.0938(129)
    In: Report series
    Type of Medium: Series available for loan
    Pages: 5 S.
    ISBN: 9518800480
    Series Statement: Report series / Department of Physical Sciences, University of Turku 129
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 3
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    Series available for loan
    Cluster population incompleteness bias and distances from the Tully-Fisher relation : theory and numerical examples (1986)
    Turku
    Associated volumes
    Details Availability
    Call number: SR 90.0938(103)
    In: Report series
    Type of Medium: Series available for loan
    Pages: 16 S.
    ISBN: 9516428037
    Series Statement: Report series / Department of Physical Sciences, University of Turku 103
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 4
    Electronic Resource
    Electronic Resource
    OBSERVATIONAL SELECTION BIAS AFFECTING THE DETERMINATION OF THE EXTRAGALACTIC DISTANCE SCALE (1997)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Astronomy and Astrophysics 35 (1997), S. 101-136 
    Details
    ISSN: 0066-4146
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Physics
    Notes: Abstract The influence of Malmquist bias on the studies of extragalactic distances is reviewed, with brief glimpses of the history from Kapteyn to Scott. Special attention is paid to two kinds of biases, for which the names Malmquist biases of the first and second kind are proposed. The essence of these biases and the situations where they occur are discussed. The bias of the first kind is related to the classical Malmquist bias (involving the "volume effect"), while the bias of the second kind appears when standard candles are observed at different (true) distances, whereby magnitude limit cuts away a part of the luminosity function. In particular, study of the latter bias in distance indicators such as Tully Fisher, available for large fundamental samples of galaxies, allows construction of an unbiased absolute distance scale in the local galaxy universe where approximate kinematic relative distances can be derived. Such investigations, using the method of normalized distances or of the Spaenhauer diagram, support the linearity of the Hubble law and make it possible to derive an unbiased value of the Hubble constant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.astro.35.1.101
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  • 5
    Electronic Resource
    Electronic Resource
    Redshifts of Markaryan galaxies (1974)
    [s.l.] : Nature Publishing Group
    Nature 252 (1974), S. 110-111 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1 Distribution of the redshifts of Markaryan galaxies. I present here a preliminary survey of the data which consist of 394 redshifts8?15 (z〈0.08) of which 90, 92, 65, and 147 are for s, sd, ds, and d objects, respectively. The measurements of Ulrich13 and Sargent14 were preferred. The ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/252110a0
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  • 6
    Electronic Resource
    Electronic Resource
    Simulation of the apparent anomalies of the galactic structure (1984)
    Springer
    Astrophysics and space science 107 (1984), S. 85-107 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In the maps of the galactic structure based on the kinematical method, several systematic heliocentric anomalies are found: in the northern galactic hemisphere the spiral arms are more tightly wound and the extent of neutral hydrogen is smaller than in the southern hemisphere; with separate rotation curves for the north and the south the arms become anomalously circular with a consequent discrepancy to the stellar distribution; there are straight portions in the arms pointing towards the Sun, as well as systematic strong curvatures and knee-like features; the inner arms affect the structure of the outer arms; with the northern rotation model, Hii-regions and Hi avoid the southern tangential circle; in the rear of the Galaxy, at symmetric longitudes, enhanced Hi-densities are found; the Perseus arm is displaced atl=180°. All of these anomalies can be explained with a simple model involving a non-velocity redshift field within the Galaxy, with an enhancement within the spiral arms. This is demonstrated by numerical simulations of the structural anomalies. Reducing the redshift effect from the kinematic data, the Galaxy's structure and kinematics appear symmetric. The significance of the result for the redshift problem is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00649616
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  • 7
    Electronic Resource
    Electronic Resource
    Additional evidence for the accuracy of galactic reddenings from ScI galaxies and quasars (1986)
    Springer
    Astrophysics and space science 122 (1986), S. 163-171 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The relevance of the galactic reddeningsE(B-V) derived by Teerikorpi (1978, 1981) from ScI galaxies and quasars, is further confirmed by considerations of close pairs in the sky, the Lick counts, and the counts/NHi ratio. The compact dust clouds suggested by Teerikorpi (1981) could not be detected directly by the counts. However, the counts/NHi ratio showed a behaviour expected if the reddenings really describe the division of the dust in the Local Spiral into compact clouds and a more diffuse medium, in the way suggested in the previous study.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00654388
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  • 8
    Electronic Resource
    Electronic Resource
    Two luminosity classes of quasars (1975)
    Springer
    Astrophysics and space science 37 (1975), S. 301-308 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Observations of quasars suggest that compact quasars with flat radio spectra belong to the class of dwarf galaxies and extended quasars with steep spectra to the one of bright galaxies. This can be seen also in the associations of quasars with clusters of galaxies, compact quasars occurring in nearby clusters and extended quasars in distant clusters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00640355
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  • 9
    Electronic Resource
    Electronic Resource
    A 15.7-min periodicity in OJ287 (1985)
    [s.l.] : Nature Publishing Group
    Nature 314 (1985), S. 148-149 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In the Turku-Otaniemi quasar variability monitoring programme9, 20 quasar-type objects are observed for a period of, in the mean, one week each month with the 13.7-m radio telescope of the Helsinki University of Technology at Metsahovi, Finland. Each source is observed for a period of 1-2 h. During ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/314148a0
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  • 10
    Electronic Resource
    Electronic Resource
    Reddenings of quasars VS PSA counts at high galactic latitudes (1989)
    Springer
    Astrophysics and space science 155 (1989), S. 19-26 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The correlation betweenE(B-V) reddenings of high latitude radio quasars (from Teerikorpi, 1981) and star/galaxy counts from the PSA prints was investigated. With the resolution down to 5′×5′, the reddenings and the counts show the relationship expected if it is assumed that most of the high latitude stars (B〈21 mag) are situated above the dust clouds. The dust causing the reddenings is probably connected with the population of molecular clouds observed at high galactic latitudes. The present study underlines the importance of simple star/galaxy counts (all images counted) for the study of high latitude variable extinction. The existence of variable extinction shows that also the average extinction must be significant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00645203
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