Publications (11)
Star formation in gaseous galaxy halos: VLT-spectroscopy of extraplanar HII-regions in NGC55
R. Tuellmann, M. R. Rosa, T. Elwert +3
We present first deep VLT-spectra of a new class of compact extraplanar objects located in the disk-halo interface of the edge-on spiral galaxy NGC55. Their spectra reveal continuu…
An unusual high-ionization nebula in NGC55
R. Tuellmann, M. R. Rosa
We report on the detection of a previously unknown extended low-density nebula of very high temperature and excitation, TR001507.7-391206, located above the midplane of NGC55. The…
Chandra ACIS Survey of M33 (ChASeM33): The enigmatic X-ray emission from IC131
R. Tuellmann, K. S. Long, T. G. Pannuti +9
We present the first X-ray analysis of the diffuse hot ionized gas and the point sources in IC131, after NGC604 the second most X-ray luminous giant HII region in M33. The X-ray em…
Spectroscopy of diffuse ionized gas in halos of selected edge-on galaxies
R. Tuellmann, R. -J. Dettmar
In order to examine the excitation and ionization mechanism of extraplanar diffuse ionized gas (DIG) we have obtained optical longslit spectra of seven edge-on spiral galaxies. In…
The multi-phase gaseous halos of star forming late-type galaxies - I. XMM-Newton observations of the Hot Ionized Medium
R. Tuellmann, W. Pietsch, J. Rossa +2
This study presents first results from an X-ray mini-survey carried out with XMM-Newton to investigate the diffuse Hot Ionized Medium in the halos of nine nearby star-forming edge-…
The Chandra ACIS Survey of M33 (ChASeM33): The final source catalog
R. Tuellmann, T. J. Gaetz, P. P. Plucinsky +16
This study presents the final source catalog of the Chandra ACIS Survey of M33 (ChASeM33). With a total exposure time of 1.4 Ms, ChASeM33 covers ~70% of the D25 isophote (R\approx4…
Searching for the pulsar in G18.95-1.1: Discovery of an X-ray point source and associated synchrotron nebula with Chandra
R. Tuellmann, P. P. Plucinsky, T. J. Gaetz +4
Using the Chandra X-ray Observatory, we have pinpointed the location of a faint X-ray point source (CXOUJ182913.1-125113) and an associated diffuse nebula in the composite supernov…
SOAP and the Interstellar Froth
R. Tuellmann, M. R. Rosa, R. -J. Dettmar
We investigate, whether the alleged failure of standard photoionization codes of the Diffuse Ionized Gas (DIG) is simply caused by geometrical effects and the insufficient treatmen…
The thermal and non-thermal gaseous halo of NGC5775
R. Tuellmann, R. -J. Dettmar, M. Soida +2
In this letter we present first results from spectroscopic observations of Diffuse Ionized Gas (DIG) in the halo of NGC5775 obtained with FORS1 attached to UT1/Antu of the Very Lar…
The Chandra ACIS Survey of M33 (ChASeM33): Investigating the Hot Ionized Medium in NGC604
R. Tuellmann, T. J. Gaetz, P. P. Plucinsky +7
NGC604 is the largest HII-region in M33, second only within the Local Group to 30 Dor, and is important as a laboratory for understanding how massive young stellar clusters interac…
The multi-phase gaseous halos of star forming late-type galaxies - II. Statistical analysis of key parameters
R. Tuellmann, D. Breitschwerdt, J. Rossa +2
In Paper I we showed that multi-phase gaseous halos of late-type spiral galaxies, detected in the radio continuum, in Halpha, and in X-rays, are remarkably well correlated regardin…