The Neutral Hydrogen Kinematics of the Dwarf Galaxy Merger NGC 3239

We present H I spectral line images of the nearby dwarf galaxy NGC 3239. The galaxy’s curious morphology suggests that it is a post-merger system. We propose that NGC 3239 is a merger because it has multiple tidal tails, an enhanced velocity dispersion throughout the disk, and widespread star formation. We have produced kinematic moment maps corresponding to the H I column density, radial velocity, and velocity dispersion. Further, position velocity (P-V) slices of the galaxy were taken and three-color images were made using the SDSS G, R, and I, filters for comparison with the moment maps. These slices illustrate the complex neutral gas dynamics in the galaxy and support the interaction hypothesi

MEASURING HISTORICAL RISK IN QUARTERLY MILK PRICES

Various methods have been used to estimate risk indices with historical data. An industry perception of increasing milk price risk over time provides a standard for evaluating several techniques used to measure historical risk. Risk measures from a regression model and an ARIMA model were consistent with the perception of increasing risk.Risk and Uncertainty,

The Ursinus Weekly, February 12, 1951

New high set by B-list group as 106 qualify • Y schedules chats, conducts retreat • Paynter-Keller production scores hit in Curtain Club group presentation • Play contest in progress; May Day heads named • Alumna to speak at girls\u27 Color Day program Thursday • Eight enter Ursinus for Spring term • Forum to feature Indian editor at next session • Speak Easy title of Ruby show • TV auditions slated • 3 graduate school test dates released • Ursinus to enter competition in intercollegiate bridge • Dr. Miller to give IRC summary of Department of State conferences attended in recent weeks • Washington trip planned by PAC • Meistersingers give concert • Editorial: Attend forums? • Senior class discusses Ruby and after-game record dance • Red Cross to organize • Juniors discuss bands • French Club to present dance Wednesday night in music studio • Thespians to discuss play • Dictionary of Folklore and Legend includes work of Dr. Phillips on Pennsylvania Dutch • Behind-scenes Dean handles transcripts, records dating from 1873, in routine work • Men reveal resignation toward draft situation • Alumnae back and Duryea\u27s got \u27em; Grads return in role of preceptresses • Coach Seeders drives Bruins toward coveted Middle Atlantic championship • Grizzlies win and lose in non-league contests • Bears edge Blue Hens for loop lead, 62-60 • Mermaids triumph over Drexel, 35-22 • Belles bag first over Bryn Mawr • Brodbeck I & II, Stine lead • Dr. Baker chooses poetry of A. E. Housman for readinghttps://digitalcommons.ursinus.edu/weekly/1558/thumbnail.jp

The Ursinus Weekly, February 12, 1951

New high set by B-list group as 106 qualify • Y schedules chats, conducts retreat • Paynter-Keller production scores hit in Curtain Club group presentation • Play contest in progress; May Day heads named • Alumna to speak at girls\u27 Color Day program Thursday • Eight enter Ursinus for Spring term • Forum to feature Indian editor at next session • Speak Easy title of Ruby show • TV auditions slated • 3 graduate school test dates released • Ursinus to enter competition in intercollegiate bridge • Dr. Miller to give IRC summary of Department of State conferences attended in recent weeks • Washington trip planned by PAC • Meistersingers give concert • Editorial: Attend forums? • Senior class discusses Ruby and after-game record dance • Red Cross to organize • Juniors discuss bands • French Club to present dance Wednesday night in music studio • Thespians to discuss play • Dictionary of Folklore and Legend includes work of Dr. Phillips on Pennsylvania Dutch • Behind-scenes Dean handles transcripts, records dating from 1873, in routine work • Men reveal resignation toward draft situation • Alumnae back and Duryea\u27s got \u27em; Grads return in role of preceptresses • Coach Seeders drives Bruins toward coveted Middle Atlantic championship • Grizzlies win and lose in non-league contests • Bears edge Blue Hens for loop lead, 62-60 • Mermaids triumph over Drexel, 35-22 • Belles bag first over Bryn Mawr • Brodbeck I & II, Stine lead • Dr. Baker chooses poetry of A. E. Housman for readinghttps://digitalcommons.ursinus.edu/weekly/1558/thumbnail.jp

The Ursinus Weekly, January 15, 1951

Dean\u27s Office announces list of February graduates • Rice tells group democracies must unite in federation • YM-YW cabinet plans February 10th retreat • Thespians to give one-act play as February 6 group production • Debaters meet LaSalle • Weekly staff reshuffled, enlarged by Board • MSGA hands down judicial decisions at special meeting • New concessions given Ruby, Norris Cleaners • Council to hold Lorelei; Negotiating Leigh\u27s return • Morrison reviews food situation with student councils • Ruby to assess groups • Dr. McClure attends educational meeting • Lantern announces deadline • Busy Jill-of-all-trades helps seven bosses • Course evaluation sheds illumination and shows discrimination • Late PMC splurge tops fired-up Grizzlies, 78-73 • Injury-riddled mat squad sustains pair of setbacks • Bruins nip Fords 62-61 with last minute rally • Girls\u27 basketball squad opens season against Bryn Mawr girls • Chess club winshttps://digitalcommons.ursinus.edu/weekly/1557/thumbnail.jp

Does backreaction enforce the averaged null energy condition in semiclassical gravity?

The expected stress-energy tensor of quantum fields generically violates the local positive energy conditions of general relativity. However, may satisfy some nonlocal conditions such as the averaged null energy condition (ANEC), which would rule out traversable wormholes. Although ANEC holds in Minkowski spacetime, it can be violated in curved spacetimes if one is allowed to choose the spacetime and quantum state arbitrarily, without imposition of the semiclassical Einstein equation G_{ab} = 8 \pi . In this paper we investigate whether ANEC holds for solutions to this equation, by studying a free, massless scalar field with arbitrary curvature coupling in perturbation theory to second order about the flat spacetime/vacuum solution. We "reduce the order" of the perturbation equations to eliminate spurious solutions, and consider the limit in which the lengthscales determined by the incoming state are much larger than the Planck length. We also need to assume that incoming classical gravitational radiation does not dominate the first order metric perturbation. We find that although the ANEC integral can be negative, if we average the ANEC integral transverse to the geodesic with a suitable Planck scale smearing function, then a strictly positive result is obtained in all cases except for the flat spacetime/vacuum solution. This result suggests --- in agreement with conclusions drawn by Ford and Roman from entirely independent arguments --- that if traversable wormholes do exist as solutions to the semiclassical equations, they cannot be macroscopic but must be ``Planck scale''. A large portion of our paper is devoted to the analysis of general issues concerning the nature of the semiclassical Einstein equation and of prescriptions for extracting physically relevant solutions.Comment: 54 pages, 3 figures, uses revtex macros and epsf.tex, to appear in Phys Rev D. A new appendix has been added showing consistency of our results with recent results of Visser [gr-qc/9604008]. Some corrections were made to Appendix A, and several other minor changes to the body of the paper also were mad

A Comprehensive Search for Low-Energy Lines in BATSE GRBs

A computer-based technique has been developed to search bright BATSE gamma-ray bursts for spectral lines in a comprehensive manner. The first results of the search are discussed and an example line candidate shown.Comment: 5 pages, LaTex using Revtex macro aipbook.sty and psfig. To appear in the Proceedings of the 3rd Huntsville Symposium on Gamma-Ray Bursts, AIP, eds. C. Kouveliotou, M. S. Briggs, G. J. Fishma

Architecture of Kepler's Multi-transiting Systems: II. New investigations with twice as many candidates

We report on the orbital architectures of Kepler systems having multiple planet candidates identified in the analysis of data from the first six quarters of Kepler data and reported by Batalha et al. (2013). These data show 899 transiting planet candidates in 365 multiple-planet systems and provide a powerful means to study the statistical properties of planetary systems. Using a generic mass-radius relationship, we find that only two pairs of planets in these candidate systems (out of 761 pairs total) appear to be on Hill-unstable orbits, indicating ~96% of the candidate planetary systems are correctly interpreted as true systems. We find that planet pairs show little statistical preference to be near mean-motion resonances. We identify an asymmetry in the distribution of period ratios near first-order resonances (e.g., 2:1, 3:2), with an excess of planet pairs lying wide of resonance and relatively few lying narrow of resonance. Finally, based upon the transit duration ratios of adjacent planets in each system, we find that the interior planet tends to have a smaller transit impact parameter than the exterior planet does. This finding suggests that the mode of the mutual inclinations of planetary orbital planes is in the range 1.0-2.2 degrees, for the packed systems of small planets probed by these observations.Comment: Accepted to Ap