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Up: Hydrogen content in Kazarian


1. Introduction

The neutral hydrogen content is one of the most important global parameters of the galaxy, giving rise to a set of certain characteristics such as total H I mass and its projected mean density, H I mass to luminosity ratio etc. serving as a useful tools to investigate the physical conditions and evolutionary trends in galaxies.

Much work has been done to study H I content in the normal galaxies covering practically all morphological types and using large, statistically significant homogeneous samples.

These investigations have shown certain correlations between morphological type, mass, luminosity and total H I mass of the galaxy (Gouguenheim 1969; Roberts 1969; Balkowski 1973; Shostak 1978; Bottinelli et al. 1982; Roberts & Haynes 1994; Solanes et al. 1996).

In particular, an extensive study of the H I integral properties of a large number of spiral galaxies has shown well defined continuous variation of H I parameters in an unbiased sample of galaxies ranging from Sa to the late spirals (Bottinelli et al. 1982). The latter article also provides carefully determined useful mean values of H I related parameters thus providing an important reference for further comparison with peculiar objects. Obviously, a better knowledge of the integral properties of normal galaxies is mandatory when trying to find out and investigate peculiar objects as well as determine their peculiarity and specific properties.

A number of papers dedicated to the H I study in galaxies from specific lists such as Markarian (Bottinelli et al. 1973a, 1975), several compact (Carozzi et al. 1974), Haro (Bottinelli et al. 1973b) and Kiso survey galaxies (Maehara et al. 1988) based on observations made with Nançay radiotelescope have been published. They give valuable criteria for the classification and better understanding of the physical properties of these galaxies as well as demonstrate their certain peculiarities.

For example, it was found that non-Seyfert Markarian galaxies show a wide variety of intrinsic physical properties which are the same as those for normal galaxies (Bottinelli et al. 1973a). In this subclass of Markarian galaxies, however the objects appear to be overluminous for their morphological type (Bottinelli et al. 1975). In the previous paper (Tamazian et al. 1997, hereafter Paper I) the hydrogen 21 cm line observational data obtained for the first time for 39 galaxies taken from Kazarian lists (Kazarian 1979; Kazarian & Kazarian 1982) have been presented out of which 30 objects have shown the positive hint of detection. These observations were made with the Nançay radiotelescope in the course of several observing runs in 1996.

  
Table 1: Main data for Kazarian galaxies
No. Type B(0) D a25 A25 L $M_{{\rm H}}$ $\sigma_{{\rm h}}$ $M_{{\rm i}}$ $\sigma_{{\rm i}}$ $M_{{\rm H}}/L$ $M_{{\rm i}}/L$ $M_{{\rm H}}/M_{{\rm i}}$ $\sigma_{{\rm h}}/A_{25}$
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
                             
1 Sbc 13.06 47.3 1.35 18.6 19.5 6.3 4.81 54.7 41.9 0.32 2.81 11.5 25.9
3 Sc 14.40 80.3 0.78 18.2 16.4 4.9 3.54 11.8 9.0 0.30 0.72 41.5 19.5
18 SBbc 13.20 66.3 1.15 22.1 33.7 4.3 2.27 91.7 47.4 0.13 2.72 4.7 10.3
19 SBbc 12.77 65.7 1.48 28.2 49.1 10.1 3.31 131.3 41.7 0.21 2.67 7.7 11.7
23 S?c 13.31 92.7 1.91 51.3 59.5 13.4 1.33 338.5 32.4 0.23 5.69 4.0 2.6
24 Sc 13.65 90.7 1.05 27.6 41.7 8.3 2.86 135.8 45.0 0.20 3.26 6.1 10.4
26 Sb 12.87 54.9 1.02 16.2 31.3 2.2 2.16 38.6 36.6 0.07 1.23 5.7 13.3
39 - 15.40 106.0 0.66 20.3 11.4 3.7 2.33 30.6 18.6 0.32 2.68 12.1 11.5
63 - 15.86 93.0 0.62 16.7 5.7 7.5 7.13 111.6 102.0 1.32 19.6 6.7 42.7
65 SBc 13.53 105.6 1.07 32.8 63.1 16.6 4.01 46.8 10.9 0.26 0.74 35.5 12.2
69 S?c 14.54 18.6 0.89 4.8 0.8 0.3 3.24 31.7 347.9 0.39 41.2 0.95 67.5
98 - 13.57 64.0 0.98 18.2 22.3 3.8 3.01 77.6 59.8 0.17 3.48 4.9 16.5
120 SBc 13.16 68.2 0.98 19.4 36.9 6.5 4.32 162.3 110.3 0.18 4.40 4.0 22.3
211 - 15.15 23.4 0.81 5.5 0.7 0.8 7.21 52.9 438.8 1.14 75.60 1.5 131.1
216 - 15.22 106.9 0.85 26.4 13.6 5.9 2.24 63.9 23.3 0.43 4.70 9.2 8.5
228 E-S0 14.20 131.4 1.00 38.1 52.7 5.3 0.95 334.5 58.1 0.10 6.35 1.6 2.5
282 Sc 13.35 53.3 1.00 15.5 19.0 1.9 2.05 50.6 53.4 0.10 2.66 3.8 13.2
445 S?b 13.89 66.8 1.45 28.1 18.1 4.5 1.51 94.6 30.4 0.25 5.23 4.8 5.4
512 - 15.56 203.1 0.16 9.4 36.0 11.7 29.30 82.2 199.2 0.33 2.28 14.2 311.7
544 SBbc 14.24 129.2 0.91 34.1 49.1 10.2 2.29 96.4 20.9 0.21 1.96 10.6 6.7
546 SBc 13.93 98.9 1.12 32.1 38.2 12.2 3.08 84.4 20.6 0.32 2.21 14.5 9.6
566 Sc 14.31 167.2 1.15 55.8 77.1 29.0 2.44 618.8 50.3 0.38 8.03 4.7 4.4
579 E-S0 15.46 95.6 0.51 14.1 8.7 4.7 6.19 5.4 6.8 0.54 0.62 87.0 43.9
                             

Column 1: Number from Kazarian lists.
Column 2: Hubble morphological type taken from LEDA (? means somewhat uncertain type).
Column 3: Corrected integral B magnitudes extracted from LEDA.
Column 4: Distance in Mpc (based on radial velocities reduced to the Local Group and $H=75~{\rm km~s}^{-1}$ ${\rm Mpc}^{-1}$).
Column 5: Angular photometric diameter in arcmin taken from LEDA (limiting isophote $B = 25^{\rm m}~{\rm arcsec}^{-2})$.
Column 6: Linear photometric diameter (kpc).
Column 7: Intrinsic B luminosity ( $10^{9} L_{\odot }$).
Column 8: Mass of neutral hydrogen ( $10^{9} M_{\odot }$).
Column 9: Neutral hydrogen density projected on the optical disk of the galaxy ( $10^{-3}~{\rm g~cm}^{-2}$).
Column 10: Indicative total mass ( $10^{9} M_{\odot }$).
Column 11: Indicative total mass density projected on the optical disk of the galaxy ( $10^{-3}~{\rm g~cm}^{-2}$).
Column 12: Ratio of neutral hydrogen mass to luminosity ( $M_{\odot}/L_{\odot})$.
Column 13: Ratio of indicative total mass to luminosity ( $M_{\odot}/L_{\odot})$.
Column 14: Ratio of neutral hydrogen mass to indicative total mass $(\times100)$.
Columnq 15: Quasi volumic neutral hydrogen density.


In the present article several global parameters such as H I mass, indicative total mass, mixed mean H I projected density, H I mass-to-luminosity and the other commonly used ratios derived from the observational data for 23 galaxies are given. Seven galaxies have been discarded either because of poor and uncertain detection with small signal-to-noise ratio or signal possibly confused with other sources (see comments on the individual objects given in Paper I).

These data are compared with the corresponding values both for normal and UV-excess galaxies, in order to describe the neutral hydrogen content and its behavior in Kazarian galaxies.


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