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Probing The Multiphase Interstellar Medium Of The Dwarf Starburst Galaxy NGC 625 With FUSE

We present new FUSE spectroscopy of the dwarf starburst galaxy NGC 625. These observations probe multiple phases of the interstellar medium, including the coronal, ionized, neutral and molecular gas. This nearby (D = 3.9 +/- 0.2 Mpc) system shows a clear d

AstrophysicalJournal,inpress

ProbingTheMultiphaseInterstellarMediumOfTheDwarf

StarburstGalaxyNGC625WithFUSESpectroscopy1

arXiv:astro-ph/0409318v1 14 Sep 2004JohnM.CannonMax-Planck-Institutf¨urAstronomie,K¨onigstuhl17,D-69117,Heidelberg,Germanycannon@mpia.deEvanD.SkillmanDepartmentofAstronomy,UniversityofMinnesota,116ChurchSt.S.E.,Minneapolis,MN55455skillman@astro.umn.eduKennethR.SembachSpaceTelescopeScienceInstitute,3700SanMartinDrive,Baltimore,MD21218sembach@stsci.eduDominikJ.BomansAstronomischesInstitut,Ruhr-Universit¨atBochum,Universit¨atsstr.150,44780,Bochum,Germanybomans@astro.ruhr-uni-bochum.de

ABSTRACT

WepresentnewFUSEspectroscopyofthedwarfstarburstgalaxyNGC625.

Theseobservationsprobemultiplephasesoftheinterstellarmedium,including

thecoronal,ionized,neutralandmoleculargas.Thisnearby(D=3.9±0.2Mpc)

systemshowsacleardetectionofout owingcoronalgasastracedbyOVIλ1032

Aabsorption.ThecentroidoftheOVIpro leisblueshiftedwithrespectto

thegalaxysystemicvelocityby~30kms 1,suggestingalow-velocityout ow.

TheimpliedOVIvelocityextentisfoundtobe100±20kms 1,whichis

fullyconsistentwiththedetectedHiout owvelocityfoundinradiosynthesis

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