http://apparentbrightness.net astronomy and stuff Mon, 03 Dec 2007 16:07:54 +0000 en hourly 1 http://wordpress.org/?v=3.0.1 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 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/ 0 http://apparentbrightness.net/2007/11/20/images-i-strong-evolution-of-galaxy-kinematics-since-z1/ http://apparentbrightness.net/2007/11/20/images-i-strong-evolution-of-galaxy-kinematics-since-z1/#comments Tue, 20 Nov 2007 13:29:15 +0000 Thomas http://apparentbrightness.net/2007/11/20/images-i-strong-evolution-of-galaxy-kinematics-since-z1/

Yang et al.

http://arxiv.org/abs/0711.2305

large project with the IFU-mode of FLAMES at the VLT.

• z=1 galaxies show more frequently “strange” kinematics than locally.

]]> http://apparentbrightness.net/2007/11/20/images-i-strong-evolution-of-galaxy-kinematics-since-z1/feed/ 0 http://apparentbrightness.net/2007/11/13/wide-field-survey-of-globular-clusters-in-m31-ii-kinematics-of-the-globular-cluster-system/ http://apparentbrightness.net/2007/11/13/wide-field-survey-of-globular-clusters-in-m31-ii-kinematics-of-the-globular-cluster-system/#comments Tue, 13 Nov 2007 08:33:25 +0000 Thomas http://apparentbrightness.net/2007/11/13/wide-field-survey-of-globular-clusters-in-m31-ii-kinematics-of-the-globular-cluster-system/

Lee at al.

http://arxiv.org/abs/0711.1232

The GCs around Andromeda rotate.

• GCs can be “friendless”, meaning they have no neighbors with similar kinematics. In addition they look at various subsamples depending e.g. on metallicity and brightness.

]]> http://apparentbrightness.net/2007/11/13/wide-field-survey-of-globular-clusters-in-m31-ii-kinematics-of-the-globular-cluster-system/feed/ 0 http://apparentbrightness.net/2007/11/12/integral-field-spectroscopy-of-a-lyman-break-galaxy-at-z32-evidence-for-merging/ http://apparentbrightness.net/2007/11/12/integral-field-spectroscopy-of-a-lyman-break-galaxy-at-z32-evidence-for-merging/#comments Mon, 12 Nov 2007 19:40:43 +0000 Thomas http://apparentbrightness.net/2007/11/12/integral-field-spectroscopy-of-a-lyman-break-galaxy-at-z32-evidence-for-merging/

Nesvadba et al.

http://arxiv.org/abs/0711.1491

the title says it.

two blobs rotating around each other without velocity difference over each of them.

• similar to UM461? but bigger.

]]> http://apparentbrightness.net/2007/11/12/integral-field-spectroscopy-of-a-lyman-break-galaxy-at-z32-evidence-for-merging/feed/ 0 http://apparentbrightness.net/2007/11/07/cosmological-parameters-from-strong-gravitational-lensing-and-stellar-dynamics-in-elliptical-galaxies/ http://apparentbrightness.net/2007/11/07/cosmological-parameters-from-strong-gravitational-lensing-and-stellar-dynamics-in-elliptical-galaxies/#comments Wed, 07 Nov 2007 10:03:56 +0000 Thomas http://apparentbrightness.net/2007/11/07/cosmological-parameters-from-strong-gravitational-lensing-and-stellar-dynamics-in-elliptical-galaxies/

Grillo et al.

http://arxiv.org/abs/0711.0882

Combining gravitational lensing and galaxy dynamics (velocity dispersion as a funciton of radius in ellipticals) as a new and independant (!) method of measuring the geometry of the universe.

• Way cool, if it ever gets on par in accuracy with the other methods.

]]> http://apparentbrightness.net/2007/11/07/cosmological-parameters-from-strong-gravitational-lensing-and-stellar-dynamics-in-elliptical-galaxies/feed/ 0 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 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.

]]> http://apparentbrightness.net/2007/10/31/2-dimensional-kinematics-of-simulated-disc-merger-remnants/feed/ 0 http://apparentbrightness.net/2007/10/31/the-coupling-of-dynamics-and-molecular-chemistry-in-galaxies/ http://apparentbrightness.net/2007/10/31/the-coupling-of-dynamics-and-molecular-chemistry-in-galaxies/#comments Wed, 31 Oct 2007 14:12:34 +0000 Thomas http://apparentbrightness.net/2007/10/31/the-coupling-of-dynamics-and-molecular-chemistry-in-galaxies/

conference proceeding by F. Combes

http://arxiv.org/abs/0709.3694

nearby galaxies

• molecular chemistry coupled to dynamics via shocks, bars, galactic outflows.

]]> http://apparentbrightness.net/2007/10/31/the-coupling-of-dynamics-and-molecular-chemistry-in-galaxies/feed/ 0 http://apparentbrightness.net/2007/10/31/outflow-or-galactic-wind-the-fate-of-ionized-gas-in-the-halos-of-dwarf-galaxies/ http://apparentbrightness.net/2007/10/31/outflow-or-galactic-wind-the-fate-of-ionized-gas-in-the-halos-of-dwarf-galaxies/#comments Wed, 31 Oct 2007 13:31:15 +0000 Thomas http://apparentbrightness.net/2007/10/31/outflow-or-galactic-wind-the-fate-of-ionized-gas-in-the-halos-of-dwarf-galaxies/

Eymeren et al.

http://arxiv.org/abs/0709.2974

extended H-alpha emssion around starbursts

deep narrow-band images & slit spectra of NGC 2366 and NGC 4861

• outflows

]]> http://apparentbrightness.net/2007/10/31/outflow-or-galactic-wind-the-fate-of-ionized-gas-in-the-halos-of-dwarf-galaxies/feed/ 0 http://apparentbrightness.net/2007/10/31/scaling-relations-of-dwarf-galaxies-without-supernova-driven-winds/ http://apparentbrightness.net/2007/10/31/scaling-relations-of-dwarf-galaxies-without-supernova-driven-winds/#comments Wed, 31 Oct 2007 13:18:27 +0000 Thomas http://apparentbrightness.net/2007/10/31/scaling-relations-of-dwarf-galaxies-without-supernova-driven-winds/

Tassis et al.

http://arxiv.org/abs/astro-ph/0609763

Dwarf galaxies: correlations between their global stellar and dynamical properties, such as circular velocity, mass-to-light ratio, stellar mass, surface brightness, and metallicity.

low and high z

simulation work

SN winds vs. ineficient SF

• useful to compare to where our data fall on these correlations

]]> http://apparentbrightness.net/2007/10/31/scaling-relations-of-dwarf-galaxies-without-supernova-driven-winds/feed/ 0