L. Viktor Toth 1,2, Dietrich Lemke 1, Stephan Hotzel 1, Oliver Krause 1, Manfred Stickel 1, Ute Lisenfeld 3, & ISOPHOT CISS Consortium: MPIA, ESA, AIP, ICSTM, IPAC
1 MPIA, Konigstuhl 17, D-69117 Heidelberg, Germany
2 Eotvos University, Dept. of Astronomy, Ludovika ter 2, H-1183, Budapest, Hungary
3 IRAM, Avenida Divina Pastora 7 NC, 18012, Granada, Spain
ISOPHOT C200 170micron serendipity mode observations (ISOPHOT Serendipity Survey, see a review by Stickel et al, in this conference) cover in total 15% of the sky with a spatial resolution of 1.5', with an average pointing accuracy of better than 1', and a dynamic range of 1MJy/sr - 400MJy/sr. The detected extragalactic sources are mostly pointlike (i.e. remained unresolved) with few exceptions like Andromeda, LMC, SMC etc. nearby galaxies. The 6.5Gbyte ISOPHOT Serendipity data set on the other hand revealed the far-infrared (FIR) structure of extended galactic objects: HII regions, HI clouds, molecular clouds, and cloud cores.
Several regions of nearby condensations of the interstellar matter in
the Milky Way were covered with acceptable completeness by the ISOPHOT
Serendipity measurements. Some of these regions will be reviewed:
- a 20
20 square degree field in Ophiuchus,
- a 1515 square degree field in Chamaeleon-Musca,
- a 88 square degree field at the North Ecliptic Pole (the ISOPHOT
Serendipity Minisurvey Field).
With the aim of deriving spectral energy distribution of our galactic findings, IRAS ISSA maps were added to the ISOPHOT Serendipity data base. The FIR colors of cirrus, starless, and star forming dense molecular clouds have been investigated. Comparison were made to available radio spectroscopic surveys. The distribution of HI and CO was compared to the FIR maps in the studied regions.
Dedicated followup measurements of three of the 170micron detected galactic objects were performed with the IRAM-30m telescope. First results of our CO measurements will be presented classifying three characteristic types of the ISOPHOT Serendipity findings.