Warp signatures of the Galactic disk as seen in mid infrared from Midcourse Space Experiment

Details Warp signatures of the Galactic disk as seen in mid infrared from Midcourse Space Experiment Warp signatures of the Galactic disk as seen in mid infrared from Midcourse Space Experiment

2005-03-17

arxiv.org/abs/astro-ph/0503388v1

Astronomy and Astrophysics

Astrophysics

To be published in 'Astronomy and Astrophysics' (12 pages including 9 figures & 4 tables)

Scientific paper

10.1051/0004-6361:20052920

The gross features in the distribution of stars as well as warm (T >~ 100 K) interstellar dust in the Galactic disk have been investigated using the recent mid infrared survey by Midcourse Space Experiment (MSX) at 8, 12, 14 & 21 micron bands. An attempt has been made to determine the location of the Galactic mid-plane at various longitudes, using two approaches : (i) fitting exponential functions to the latitude profiles and (ii) statistical indicators.The former method is successful for the inner Galaxy (-90 < l < 90), and quantifies characteristic angular scales along latitude, which have been translated to linear scale heights (z_h) and radial length scales (R_l) using geometric description of the Galactic disk. The distribution of warm dust in the Galactic disk is found to be characterised by R_l < 6 kpc and 60 < z_h <~ 100 pc, in agreement with other studies. The location of the Galactic mid-plane as a function of longitude, for stars as well as warm dust, has been searched for signatures of warp-like feature in their distribution, by fitting sinusoid with phase and amplitude as parameters. In every case, the warp signature has been detected. An identical analysis of the DIRBE/COBE data in all its ten bands covering the entire infrared spectrum (1.25-240 micron), also leads to detection of warp signatures with very similar phase as found from the MSX data. Our results have been compared with those from other studies.

Affiliated with

Also associated with

No associations

Rating

Warp signatures of the Galactic disk as seen in mid infrared from Midcourse Space Experiment 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 Warp signatures of the Galactic disk as seen in mid infrared from Midcourse Space Experiment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Warp signatures of the Galactic disk as seen in mid infrared from Midcourse Space Experiment will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-606507