NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-08-25 T07:25:32 PDT
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For refcode 2007A&A...474..461I:
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NED Abstract

Copyright by European Southern Observatory (ESO). Reproduced by permission
2007A&A...474..461I PAHs in the halo of NGC 5529 Irwin, J. A.; Kennedy, H.; Parkin, T.; Madden, S. Abstract. We present sensitive ISO {lambda} 6.7~ micron observations of the edge-on galaxy, NGC 5529, finding an extensive MIR halo around NGC 5529. The emission is dominated by PAHs in this band. The PAH halo has an exponential scale height of 3.7 kpc but can still be detected as far as ~10 kpc from the plane to the limits of the high dynamic range (1770/1) data. This is the most extensive PAH halo yet detected in a normal galaxy. This halo shows substructure and the PAHs likely originate from some type of disk outflow. PAHs are long-lived in a halo environment and therefore continuous replenishment from the disk is not required (unless halo PAHs are also being destroyed or removed), consistent with the current low SFR of the galaxy. The PAHs correlate spatially with halo H{alpha} emission, previously observed by Miller & Veilleux (2003, ApJS, 148, 383); both components are likely excited/ionized by in-disk photons that are leaking into the halo. The presence of halo gas may be related to the environment of NGC 5529 which contains at least 17 galaxies in a small group of which NGC 5529 is the dominant member. Of these, we have identified two new companions from the SDSS. Key words: galaxies: general, galaxies: individual: NGC 5529, galaxies: halos, galaxies: ISM
Retrieve 24 NED objects in this reference.
Please click here for ADS abstract

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