Skip to main content Accessibility help
×
Home

A Study of Low density Ionized Gas in the Galactic Plane

  • D. Anish Roshi (a1) and K. R. Anantharamaiah (a1)

Abstract

A complete survey of radio recombination lines (RRLs) near 327 MHz from the galactic plane (l = 330° − 0°-89°, b = 0°) was carried out using a section of the Ooty Radio Telescope (ORT) with an angular resolution of 2° × 2°. A subset of regions in the same area was observed using the whole telescope which has a beam of 2° × 6'. Hydrogen RRLs were detected in most of the positions that were observed. The lv diagram and radial distribution computed from the observed spectra and their comparison with other species in the galactic plane indicate that the low density gas detected in the survey is distributed similar to the star forming regions. For an assumed temperature of 7000 K, we estimate that the densities and sizes of the regions are in the range 1 — 10 cm−3 and 20 — 200 pc respectively. Our data suggests that the low density ionized gas is in the form of outer envelopes of normal HII regions.

    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      A Study of Low density Ionized Gas in the Galactic Plane
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      A Study of Low density Ionized Gas in the Galactic Plane
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      A Study of Low density Ionized Gas in the Galactic Plane
      Available formats
      ×

Copyright

References

Hide All
Anantharamaiah, K. R. 1986, JAA, 7, 131
Gottesman, S. T., Gordon, M. A. 1970, ApJ, 162, L93
Heiles, C. 1994, ApJ, 436, 720
Heiles, C., Reach, W. T., Koo, B.-C. 1996, ApJ, 466, 191
Mezger, P. G. 1978, A&A, 70, 565
Petuchowski, S. J., Bennett, C. L. 1993, ApJ, 405, 591
Taylor, J. H., Cordes, J.M. 1993, ApJ, 411, 674
Zuckerman, B. 1973, ApJ, 183, 863

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed