http://apparentbrightness.net astronomy and stuff Mon, 03 Dec 2007 16:07:54 +0000 http://wordpress.org/?v=2.6 en http://apparentbrightness.net/2007/11/20/star-formation-in-the-hi-bridge-between-m81-and-m82/ http://apparentbrightness.net/2007/11/20/star-formation-in-the-hi-bridge-between-m81-and-m82/#comments Tue, 20 Nov 2007 14:13:50 +0000 Thomas Marquart http://apparentbrightness.net/2007/11/20/star-formation-in-the-hi-bridge-between-m81-and-m82/

de Mello et al.

http://arxiv.org/abs/0711.2685

They found both old and young stars in the region between the two galaxies and conclude that the former were flung out of either of the two while the latter have formed in the tidal tail.

Overall, there seems to be quite little going on there compared to other tidal tails (e.g. of mergers) where active star formation is often seen.

]]> http://apparentbrightness.net/2007/11/20/star-formation-in-the-hi-bridge-between-m81-and-m82/feed/ http://apparentbrightness.net/2007/11/20/the-mw-is-an-exceptionnally-quiet-galaxy-implications-for-spiral-formation/ http://apparentbrightness.net/2007/11/20/the-mw-is-an-exceptionnally-quiet-galaxy-implications-for-spiral-formation/#comments Tue, 20 Nov 2007 14:06:40 +0000 Thomas Marquart http://apparentbrightness.net/2007/11/20/the-mw-is-an-exceptionnally-quiet-galaxy-implications-for-spiral-formation/

Puech et al.

http://arxiv.org/abs/0711.2881

Conference proceeding on how the MW is special in the sense that it forms little stars and therefore cannot have undergone a merger for a long time.

]]> http://apparentbrightness.net/2007/11/20/the-mw-is-an-exceptionnally-quiet-galaxy-implications-for-spiral-formation/feed/ http://apparentbrightness.net/2007/11/12/the-role-of-minor-mergers-in-the-recent-star-formation-history-of-early-type-galaxies/ http://apparentbrightness.net/2007/11/12/the-role-of-minor-mergers-in-the-recent-star-formation-history-of-early-type-galaxies/#comments Mon, 12 Nov 2007 12:14:02 +0000 Thomas Marquart http://apparentbrightness.net/2007/11/12/the-role-of-minor-mergers-in-the-recent-star-formation-history-of-early-type-galaxies/

Kaviraj et al.

http://arxiv.org/abs/0711.1493

Simulations on how minor mergers can explain the variation in UV-fluxes of ellipticals.

They say they cannot “rule out” gas accretion, but I wonder where the dividing line goes between a gas-rich dwarf being eaten and infall of gas.

]]> http://apparentbrightness.net/2007/11/12/the-role-of-minor-mergers-in-the-recent-star-formation-history-of-early-type-galaxies/feed/ http://apparentbrightness.net/2007/10/31/2-dimensional-kinematics-of-simulated-disc-merger-remnants/ http://apparentbrightness.net/2007/10/31/2-dimensional-kinematics-of-simulated-disc-merger-remnants/#comments Wed, 31 Oct 2007 14:43:27 +0000 Thomas Marquart http://apparentbrightness.net/2007/10/31/2-dimensional-kinematics-of-simulated-disc-merger-remnants/

Jesseit et al.

http://arxiv.org/abs/astro-ph/0606144

“real” simulations are the way to go for understanding the complex velocity fields of our BCGs.

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