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Tracing the disk-halo interaction in late type galaxies by X-ray observations Ralf-Jürgen Dettmar Astronomical Institute Ruhr-University Bochum with Jörn.

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Presentation on theme: "Tracing the disk-halo interaction in late type galaxies by X-ray observations Ralf-Jürgen Dettmar Astronomical Institute Ruhr-University Bochum with Jörn."— Presentation transcript:

1 Tracing the disk-halo interaction in late type galaxies by X-ray observations Ralf-Jürgen Dettmar Astronomical Institute Ruhr-University Bochum with Jörn Rossa, Ralph Tüllmann, Volker Heesen, Dieter Breitschwerdt, Michael Dahlem, Matthias Ehle, Wolfgang Piech, Rainer Beck, Marita Krause, Marian Soida, Marek Urbanik, Peter Kamphuis et al.

2 X-rays from the disk-halo interface in spirals Ralf-Jürgen Dettmar @X-rays from Nearby Galaxies ESAC 6.9.2007 2 our paradigm… from Reynolds in Scientific American

3 X-rays from the disk-halo interface in spirals Ralf-Jürgen Dettmar @X-rays from Nearby Galaxies ESAC 6.9.2007 3

4 X-rays from the disk-halo interface in spirals Ralf-Jürgen Dettmar @X-rays from Nearby Galaxies ESAC 6.9.2007 4

5 X-rays from the disk-halo interface in spirals Ralf-Jürgen Dettmar @X-rays from Nearby Galaxies ESAC 6.9.2007 5 Ferrara & McLow

6 X-rays from the disk-halo interface in spirals Ralf-Jürgen Dettmar @X-rays from Nearby Galaxies ESAC 6.9.2007 6 NGC 4631 Chandra Wang et al. NGC 4631NGC 4631

7 X-rays from the disk-halo interface in spirals Ralf-Jürgen Dettmar @X-rays from Nearby Galaxies ESAC 6.9.2007 7 What controls the interstellar disk-halo 1 connection ? we want to look at… energy required mass transfered metals provided 1) Sometimes now also called ISM/IGM connection

8 X-rays from the disk-halo interface in spirals Ralf-Jürgen Dettmar @X-rays from Nearby Galaxies ESAC 6.9.2007 8 example: N891 total HI Halos have a multiphase medium: neutral (perhaps even molecular?)

9 X-rays from the disk-halo interface in spirals Ralf-Jürgen Dettmar @X-rays from Nearby Galaxies ESAC 6.9.2007 9 gaseous galactic halos of diffuse ionized gas (DIG) are easily observable in H  NGC4700 (Rossa&Dettmar 2001)

10 X-rays from the disk-halo interface in spirals Ralf-Jürgen Dettmar @X-rays from Nearby Galaxies ESAC 6.9.2007 10 Larger sample of edge-on galaxies including objects with lower FIR luminosity

11 X-rays from the disk-halo interface in spirals Ralf-Jürgen Dettmar @X-rays from Nearby Galaxies ESAC 6.9.2007 11 Rossa & Dettmar (2003)

12 X-rays from the disk-halo interface in spirals Ralf-Jürgen Dettmar @X-rays from Nearby Galaxies ESAC 6.9.2007 12 NGC 7090 Dahlem & Ehle ATCA Rossa et al. ACS/HST

13 X-rays from the disk-halo interface in spirals Ralf-Jürgen Dettmar @X-rays from Nearby Galaxies ESAC 6.9.2007 13 a small survey of disk galaxies with XMM: (Tüllmann et al. 2006 A&A)

14 X-rays from the disk-halo interface in spirals Ralf-Jürgen Dettmar @X-rays from Nearby Galaxies ESAC 6.9.2007 14 NGC 4631 seen with XMM-Newton (Tüllmann, Dettmar et. al. 2006)

15 X-rays from the disk-halo interface in spirals Ralf-Jürgen Dettmar @X-rays from Nearby Galaxies ESAC 6.9.2007 15 X-ray luminosity – SFR correlation Tüllmann et al. A&A 2006 a,b from XMM-Newton

16 X-rays from the disk-halo interface in spirals Ralf-Jürgen Dettmar @X-rays from Nearby Galaxies ESAC 6.9.2007 16

17 X-rays from the disk-halo interface in spirals Ralf-Jürgen Dettmar @X-rays from Nearby Galaxies ESAC 6.9.2007 17

18 X-rays from the disk-halo interface in spirals Ralf-Jürgen Dettmar @X-rays from Nearby Galaxies ESAC 6.9.2007 18

19 X-rays from the disk-halo interface in spirals Ralf-Jürgen Dettmar @X-rays from Nearby Galaxies ESAC 6.9.2007 19

20 X-rays from the disk-halo interface in spirals Ralf-Jürgen Dettmar @X-rays from Nearby Galaxies ESAC 6.9.2007 20

21 X-rays from the disk-halo interface in spirals Ralf-Jürgen Dettmar @X-rays from Nearby Galaxies ESAC 6.9.2007 21

22 X-rays from the disk-halo interface in spirals Ralf-Jürgen Dettmar @X-rays from Nearby Galaxies ESAC 6.9.2007 22 numerical models of the ISM: de Avillez & Breitschwerdt

23 X-rays from the disk-halo interface in spirals Ralf-Jürgen Dettmar @X-rays from Nearby Galaxies ESAC 6.9.2007 23 DIG halo of NGC 5775 VLT / FORS1 slit positions (Tüllmann et al 2000)

24 X-rays from the disk-halo interface in spirals Ralf-Jürgen Dettmar @X-rays from Nearby Galaxies ESAC 6.9.2007 24 NGC 5775 rotation drops to systemic

25 X-rays from the disk-halo interface in spirals Ralf-Jürgen Dettmar @X-rays from Nearby Galaxies ESAC 6.9.2007 25 NGC 891 WIYN Howk et al.

26 X-rays from the disk-halo interface in spirals Ralf-Jürgen Dettmar @X-rays from Nearby Galaxies ESAC 6.9.2007 26 NGC 891 H  velocity field from Fabry-Perot observations Kamphuis, Peletier, Dettmar et al. A&A 2007

27 X-rays from the disk-halo interface in spirals Ralf-Jürgen Dettmar @X-rays from Nearby Galaxies ESAC 6.9.2007 27 Kamphuis, Peletier, Dettmar, et al. 2007

28 X-rays from the disk-halo interface in spirals Ralf-Jürgen Dettmar @X-rays from Nearby Galaxies ESAC 6.9.2007 28 Summary: gas halo ISM is „multiphase“ the presence of ionized gas and CRs in halos is correlated with the star formation in the underlying disk observed „X-ray hot halos“ fit into this general picture (temp. gradients) a strong poloidal component of the magnetic field is associated with the presence of gaseous halos the warm ionized gaseous halos rotate differentially showing decreasing rotation with increasing hight above the plane

29 X-rays from the disk-halo interface in spirals Ralf-Jürgen Dettmar @X-rays from Nearby Galaxies ESAC 6.9.2007 29 VLA 6cm mosaic (15 pointings) Heesen, PhD thesis, in prep.

30 X-rays from the disk-halo interface in spirals Ralf-Jürgen Dettmar @X-rays from Nearby Galaxies ESAC 6.9.2007 Red: Halpha Green: VLA 6.2 cm total power Blue: ROSAT (soft X-ray)‏ B-vectors VLA 6.2 cm

31 X-rays from the disk-halo interface in spirals Ralf-Jürgen Dettmar @X-rays from Nearby Galaxies ESAC 6.9.2007 31

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