428 research outputs found
Rotor balancing apparatus and system
Rotor balancing apparatus and a system comprising balance probes for measuring unbalance at the ends of a magnetically suspended rotor are disclosed. Each balance probe comprises a photocell which is located in relationship to the magnetically suspended rotor such that unbalance of the rotor changes the amount of light recorded by each photocell. The signal from each photocell is electrically amplified and displayed by a suitable device, such as an oscilloscope
Attitudes of pregnant women towards collection of biological specimens during pregnancy and at birth
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/90568/1/j.1365-3016.2012.01265.x.pd
Senior Recital: Joseph Poole, bass trombone
This recital is presented in partial fulfillment of requirements for the degree Bachelor of Music in Performance. Mr. Poole studies bass trombone with Brian Hecht.https://digitalcommons.kennesaw.edu/musicprograms/1245/thumbnail.jp
The delay time distribution of supernovae from integral-field spectroscopy of nearby galaxies
Constraining the delay-time distribution (DTD) of different supernova (SN)
types can shed light on the timescales of galaxy chemical enrichment and
feedback processes affecting galaxy dynamics, and SN progenitor properties.
Here, we present an approach to recover SN DTDs based on integral field
spectroscopy (IFS) of their host galaxies. Using a statistical analysis of a
sample of 116 supernovae in 102 galaxies, we evaluate different DTD models for
SN types Ia (73), II (28) and Ib/c (15). We find the best SN Ia DTD fit to be a
power law with an exponent (50\% confidence interval),
and a time delay (between star formation and the first SNe) (50\% C.I.). For core collapse (CC) SNe, both of the
Zapartas et al. (2017) DTD models for single and binary stellar evolution are
consistent with our results. For SNe II and Ib/c, we find a correlation with a
Gaussian DTD model with and (50\% C.I.) respectively. This analysis demonstrates that
integral field spectroscopy opens a new way of studying SN DTD models in the
local universe
Recovering lost light: discovery of supernova remnants with integral field spectroscopy
We present results from a systematic search for broad ( 400 \kms) \ha\
emission in Integral Field Spectroscopy data cubes of 1200 nearby
galaxies obtained with PMAS and MUSE. We found 19 unique regions that pass our
quality cuts, four of which match the locations of previously discovered SNe:
one Type IIP, and three Type IIn, including the well-known SN 2005ip. We
suggest that these objects are young Supernova Remnants, with bright and broad
\ha\ emission powered by the interaction between the SN ejecta and dense
circumstellar material. The stellar ages measured at the location of these SNR
candidates are systematically lower by about 0.5 dex than those measured at the
location of core collapse SNe, implying that their progenitors might be shorter
lived and therefore more massive than a typical CC SN progenitor. The methods
laid out in this work open a new window into the study of nearby SNe with
Integral Field Spectroscopy.Comment: 16 pages, 10 figures, submitted to AAS journal
Choral Ensembles Spring Concert
Kennesaw State University School of Music presents Choral Ensembles Spring Concert.https://digitalcommons.kennesaw.edu/musicprograms/1363/thumbnail.jp
- …