* Astronomy

Members Login
Post Info TOPIC: NGC 3379


L

Posts: 128711
Date:
Messier 105
Permalink  
 


Cropped image of NGC 3384, NGC 3379 (M105) and NGC 3389 captured with a 100mm" f5 refractor and Canon EOS 350D.

Picture 827



__________________


L

Posts: 128711
Date:
RE: NGC 3379
Permalink  
 


NGC 3384, NGC 3379 (M105) and  NGC 3389 captured with a 8" f5 reflector and Canon EOS 350D. 

Picture 793 


__________________


L

Posts: 128711
Date:
Permalink  
 

Picture 056_7Picture 049
Date 26.02.15 


__________________


L

Posts: 128711
Date:
Permalink  
 

Messier 105 (also M105, NGC 3379, UGC 5902 and PGC 32256)is a magnitude +10.2 elliptical galaxy located 32.0 ±1.6 million light-years away in the constellation Leo. 

The galaxy was discovered by French astronomer Pierre Francois Andre Mechain on the 24th March 1781.

Right Ascension 10h 47m 50s, Declination +12° 34' 52"

This galaxy is one of several that were not originally included in the original Messier Catalogue compiled by Charles Messier. Messier 105 was included in the catalog only when Helen S. Hogg found a letter by Méchain describing Messier 105 and when the object described by Méchain was identified as a galaxy previously named NGC 3379.
Read more



__________________


L

Posts: 128711
Date:
Messier 105
Permalink  
 


M105 - Elliptical Galaxy - Deep Sky Videos



__________________


L

Posts: 128711
Date:
NGC 3379
Permalink  
 


Title: Deep Chandra Monitoring Observations of NGC 3379: Catalogue of Source Properties
Authors: N. J. Brassington, G. Fabbiano, D.-W. Kim, A. Zezas, S. Zepf, A. Kundu, L. Angelini, R. L. Davies, J. Gallagher, V. Kalogera, T. Fragos, A. R. King, S. Pellegrini, G. Trinchieri

We present the properties of the discrete X-ray sources detected in our monitoring program of the `typical' elliptical galaxy, NGC 3379, observed with Chandra ACIS-S in five separate pointings, resulting in a co-added exposure of 324-ks. From this deep observation, 132 sources have been detected within the region overlapped by all observations, 98 of which lie within the D25 ellipse of the galaxy. Of these 132 sources, ranging in Lx from 6E35 erg/s to ~2E39 erg/s, we find one source with Lx>1E39 erg/s, which has been classified as a ULX. From optical data, 10 X-ray sources have been determined to be coincident with a globular cluster, these sources tend to have high X-ray luminosity, with three of these sources exhibiting Lx> 1E38 erg/s. From X-ray source photometry, it has been determined that the majority of the 132 sources that have well constrained colours, have values that are consistent with typical LMXB spectra. Additionally to this, a sub-population of 10 sources has been found to exhibit very hard spectra and it is expected that most of these sources are absorbed background AGN. There are 86 sources in this population that exhibit long-term variability, indicating that they are accreting compact objects. 11 of these sources have been identified as transient candidates, with a further 7 possible transients. Spectral variations have also been identified in the majority of the source population, where a diverse range of variability has been identified, indicating that there are many different source classes located within this galaxy.

Read more (2203kb, PDF)

__________________
Page 1 of 1  sorted by
Quick Reply

Please log in to post quick replies.



Create your own FREE Forum
Report Abuse
Powered by ActiveBoard