Expansion Velocities and Core Masses of Bright Planetary Nebulae in the Virgo Cluster

Bibcode
2008ApJ...674L..17A
DOI
10.1086/528846
Arnaboldi, Magda; Doherty, Michelle; Gerhard, Ortwin; Ciardullo, Robin; Aguerri, J. Alfonso L.; Feldmeier, John J.; Freeman, Kenneth C.; Jacoby, George H.
Bibliographical reference

The Astrophysical Journal, Volume 674, Issue 1, pp. L17-L20.

Advertised on:
2
2008
Journal
The Astrophysical Journal
Number of authors
8
IAC number of authors
1
Citations
18
Refereed citations
12
Description
The line-of-sight velocities and [O III] 5007 Å expansion velocities are measured for 11 planetary nebulae (PNs) in the Virgo Cluster core, at 15 Mpc distance, with the FLAMES spectrograph on the ESO VLT. These PNs are located about halfway between the two giant elliptical galaxies M87 and M86. From the [O III] 5007 Å line profile widths, the average half-width at half-maximum expansion velocity for this sample of 11 PNs is v¯HWHM=16.5 km s-1 (rms=2.6 km s-1). We use the PN subsample bound to M87 to remove the distance uncertainties and the resulting [O III] 5007 Å luminosities to derive the central star masses. We find these masses to be at least 0.6 Msolar and obtain PN observable lifetimes tPN<2000 yr, which imply that the bright PNs detected in the Virgo Cluster core are compact, high-density nebulae. We finally discuss several scenarios for explaining the high central star masses in these bright M87 halo PNs.
Related projects
Abell 370 is located approximately 4 billion light-years away in the constellation Cetus, the Sea Monster
Galaxy Evolution in Clusters of Galaxies

Galaxies in the universe can be located in different environments, some of them are isolated or in low density regions and they are usually called field galaxies. The others can be located in galaxy associations, going from loose groups to clusters or even superclusters of galaxies. One of the foremost challenges of the modern Astrophysics is to

Jairo
Méndez Abreu
In progress
Type
Refereed
Galaxies
Galaxies
Planetary nebulae
Formation & Evolution of Galaxies (FYEG)

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