The Milky Way, The Local Galaxies \& the IR Tully-Fisher Relation

Details The Milky Way, The Local Galaxies \& the IR Tully-Fisher Relation The Milky Way, The Local Galaxies \& the IR Tully-Fisher Relation

1996-04-25

arxiv.org/abs/astro-ph/9604151v1

Astronomy and Astrophysics

Astrophysics

11 pages, aaspp macro, 3 figures, submitted to the Astrophysical Journal. Also available at http://www.astro.princeton.edu/~sa

Scientific paper

10.1086/178181

Using the near infrared fluxes of local galaxies derived from COBE/DIRBE J(1.25 $\mu$m) K (2.2 $\mu$m) \& L (3.5 $\mu$m) band maps and published Cepheid distances, we construct Tully-Fisher (TF) diagrams for the nearby galaxies. The measured dispersions in these luminosity-linewidth diagrams are remarkably small: $\sigma_J = 0.09$ magnitudes, $\sigma_K = 0.13$ magnitudes, and $\sigma_L = 0.20$ magnitudes. For the J and K bands, Monte Carlo simulations give a 95\% confidence interval upper limit on the true scatter in the T-F diagram of $\sigma_J \le 0.35$ and $\sigma_K \le 0.45$. We determine Milky Way's luminosity and place it in the T-F diagram by fitting a bar plus ``standard'' values of its size and circular speed (Sun-Galactic center distance $R_0 = 8.5 \kpc$ and $\Theta_0 =220 \kms$), the Milky Way lies within $1.5 \sigma$ of the TF relations. We can use the TF relation and the Cepheid distances to nearby bright galaxies to constrain $R_0$ and $\Theta_0$. Alternatively, we can fix the parameters of the Galaxy to their standard values, ignore the Cepheid zero-point, and use the Tully-Fisher relation to determine the Hubble Constant directly: $H_0 = 66 \pm 12$ km/s/Mpc.

Affiliated with

Also associated with

No associations

Rating

The Milky Way, The Local Galaxies \& the IR Tully-Fisher Relation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The Milky Way, The Local Galaxies \& the IR Tully-Fisher Relation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Milky Way, The Local Galaxies \& the IR Tully-Fisher Relation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-385511