The ``HIPASS Bright Galaxy Catalog''

B. Koribalski (ATNF) + HIPASS/ZOA Teams

(updated: 21 - January - 2002)

Adopted Constants and Formula:

• Adopted Hubble constant:

  H_o = 75 km s^-1 Mpc^-1

• Local Group velocity in km/s:

  v_LG = v_sys + 300 sin(l) cos(b)

  where l is the Galactic longitude and b the Galactic latitude, and v_sys is the systemic velocity in km/s.

• Distance in Mpc:

  D = v_LG / H_o

  We adopt the following distances for galaxies with small Local Group velocities (v_LG < 135 km/s):
  

       NGC6822       0.490 Mpc   (Mateo 1998)
       DDO210        0.880 Mpc   (Mateo 1998)
       NGC0055       1.480 Mpc   (Mateo 1998)
       NGC0300       2.04  Mpc   (Willick & Batra 2001)
       ESO594-G004   1.060 Mpc   (Mateo 1998)
       IC5152        1.590 Mpc   (Mateo 1998)
       WLM           0.925 Mpc   (Mateo 1998)
       NGC3109       1.250 Mpc   (Mateo 1998)
       SextansA      1.440 Mpc   (Mateo 1998).
       

• HI Mass:

  M_HI = 2.36 10⁵ D² F_HI

  where D is the distance in Mpc and F_HI is the HI flux in Jy km/.s.

• apparent blue magnitude, m_b (= b_t in LEDA)

• estimated Galactic extinction, a_g

• estimated internal extinction, a_i (here currently neglected)

• absolute blue magnitude:

  M_B,0 = m_b - a_g - 5 log D + 25

  with D in Mpc.

• Blue Luminosity in L_sun:

  L_B = D² 10^{10 - 0.4 (m_b - a_g - M_B,sun)} = 10^{0.4 (M_B,sun - M_B,0)}

  with M_B,sun = 5.37???, the solar blue absolute magnitude.

• => M_HI/L_B = 1.5 10^-7 F_HI 10^{0.4*(m_b-a_g)}