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53 papers · 1 filter
Leo II Group: decoupled cores of NGC 3607 and NGC 3608
Victor L. Afanasiev, Olga K. Sil'chenko
The kinematics, structure, and stellar population properties in the centers of two brightest early-type galaxies of the Leo II group, NGC 3607 and NGC 3608, are studied by means of…
The ARAUCARIA Project: VLT-FORS spectroscopy of blue supergiants in NGC 3109 - Classifications, first abundances and kinematics
C. J. Evans, F. Bresolin, M. A. Urbaneja +3
We have obtained multi-object spectroscopy of luminous blue supergiants in NGC 3109, a galaxy at the periphery of the Local Group at ~1.3 Mpc. We present a detailed catalog includi…
New Debris Disks Around Nearby Main Sequence Stars: Impact on The Direct Detection of Planets
C. Beichman, G. Bryden, K. Stapelfeldt
Using the MIPS instrument on the Spitzer telescope, we have searched for infrared excesses around a sample of 82 stars, mostly F, G, and K main-sequence field stars, along with a s…
The Structure of Galaxies at Faint Light Levels: Probing Galaxy Assembly
Annette M. N. Ferguson
Many clues about the galaxy assembly process lurk in the faint outer regions of galaxies. Although quantitative study of these parts has been severely limited in the past, breakthr…
Spectropolarimetry of the 3.4 micron absorption feature in NGC 1068
R. E. Mason, G. S. Wright, A. Adamson +1
In order to test the silicate-core/organic-mantle model of galactic interstellar dust, we have performed spectropolarimetry of the 3.4 micron C-H bond stretch that is characteristi…
On the prevalence of radio-loud AGN in brightest cluster galaxies: implications for AGN heating of cooling flows
P. N. Best, A. von der Linden, G. Kauffmann +2
(Abridged) The prevalence of radio-loud AGN activity in present-day massive halos is determined using a sample of 625 nearby groups and clusters from the SDSS. Brightest group and…