» » Richard Pogge - Feb 10: Spiral Galaxies

Richard Pogge - Feb 10: Spiral Galaxies FLAC album


Performer: Richard Pogge
Genre: Audio recording
Title: Feb 10: Spiral Galaxies
Released: 2006
Style: Spoken Word, Education
FLAC version ZIP size: 1221 mb
MP3 version ZIP size: 1558 mb
WMA version ZIP size: 1460 mb
Rating: 4.5
Votes: 442
Other Formats: AIFF AAC MP4 APE MMF VOC MP3

A spiral galaxy maintains its spirals arms due to density wave theory. Below is a list of notable spiral galaxies with their own articles. The classification column refers to the galaxy morphological classification used by astronomers to describe galaxy structure. Lists of astronomical objects.

Abstract: We have determined the fraction of barred galaxies in the H-band for a statistically well-defined sample of 186 spirals drawn from the Ohio State University Bright Spiral Galaxy survey. We find 56% of our sample to be strongly barred at H, while another 16% is weakly barred. Only 27% of our sample is unbarred in the near-infrared. The RC3 and the Carnegie Atlas of Galaxies both classify only about 30% of our sample as strongly barred.

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Magellanic spirals go elsewhere, as do intra-Lacteal vistas. Far edge 4K nirklars 3 0. Advertisement. Join Now Advertise Here.

Most of the known spiral galaxies fall into this barred category – which are defined by the pronounced bar structure across their centres. The presence of this structure may be an indication of a galaxy’s age. Two-thirds of nearby, younger galaxies have the bar, while only a fifth of older, more distant spirals have it. An image of a "barred spiral" galaxy that could help us better understand our own Milky Way has been captured by Hubble space telescope.

Modelling the SEDs of spiral galaxies Astronomy in the Submillimeter and Far Infrared Domains with the Herschel Space Observatory L. Pagani and M. Gerin (eds) EAS Publications Series, 34 (2009) 247-256p. 247. Dust extinction and emission in a clumpy galactic disk - An application of the radiative transfer code TRADING A&A 490, 461-475 (2008).

Professor of Astronomy at The Ohio State University, Department of Astronomy. Born 02-Feb-1961 in Omaha, Nebraska, USA. Sites: astronomy.

Exponential scale length. h almost independent on the morphological type (. Using HI observations of spiral galaxies, in 1977 R. Brent Tully and J. Richard Fisher found that the maximum rotation velocity of spirals is closely related with their luminosity, following the relation. L ∝ Vmαax, where the slope of the TF relation is about α ≈ 3 − 4.

A strange new kind of galactic beast has been spotted in the cosmic wilderness.

Tracklist

1 Feb 10: Spiral Galaxies 41:38

Notes

These lecture podcasts are audio recordings of daily lectures from Prof. Richard Pogge's Winter Quarter 2006 section of Astronomy 162 at The Ohio State University. They were recorded live, unscripted and unedited.