The Ursinus Weekly, May 16, 1949

New chapel system for fall to include all upper-classmen • Pageant emphasizes unity as Floy Lewis rules day • Y backs admission of European frosh • Med. society elects D. Schultz president • Cancer drive fails to reach $500 goal • Men select MacQueen new MSGA president • Coed dorms elect next year\u27s heads • Derstine, Bare, Johnson get top \u27Weekly\u27 posts • Prize-winning \u2749 Ruby to arrive for distribution in dorms soon • Kauffman-Hart comedy scores success with Ursinus audiences • Garnet strength defeats bruin, Drexel tracksters • Genial coach heads grizzly cindermen • Belles\u27 Jayvee tennis team wins 4-1 decision over Temple squad • Bruins take Albright 3-2; submit 5-4 to Haverford • Softball team stops Temple lassies 9-4 to stay undefeated • Russ Binder retains title as MA sprint champion • Playoffs due soon in campus softball • Ursinus loses 9-0 on Albright courts • Belle\u27s court squad achieves initial win • Golfers triumph over Moravian; bow to Delaware\u27s Blue Hens • Chandler to meet Brazil\u27s Dutra • Chess Club elects Johnson prexy • Tau Sig elects future officers • Kaimer to be Kappa Delta headhttps://digitalcommons.ursinus.edu/weekly/1618/thumbnail.jp

The velocity dispersion and mass profile of the Milky Way

We re-analyse the velocity-dispersion profile sigma(r) at radii r>10 kpc in the Galactic stellar halo, recently derived by Battaglia et al. (2005), who concluded that, for constant velocity anisotropy of the tracers, these data rule out a flat circular-speed curve for the Milky Way. However, we demonstrate that if one makes the natural assumption that the tracer density is truncated at r_t >~ 160 kpc and falls off significantly more steeply than r^-3.5 at r >~ 80 kpc, then these data are consistent with a flat circular-speed curve and a constant velocity anisotropy comparable to that observed for halo stars in the Solar neighbourhood. We also consider a more detailed mass model with an exponential stellar disc and an extended non-isothermal dark-matter halo. In this two-component model, the Milky Way's virial radius and mass are r_vir = 200 kpc and M_vir = 1.5 x 10^12 M_sun. Still assuming the tracers' velocity anisotropy to be constant (at beta=0.5) we again find good agreement with the observed sigma(r), so long as the tracer density is truncated near the virial radius. These data by themselves do not allow to differentiate between different dark-halo or total-mass models for the Milky Way, nor between different velocity-anisotropy profiles for the tracers.Comment: 5 pages, 4 figures, accepted for publication in MNRA

The Ursinus Weekly, April 11, 1949

Censorship cancels April fool issue • Debaters finish second in Ben Franklin tourney • Terror and humor to occupy evening of thespian talent • Weekly editors cancel year\u27s plans following last minute faculty demand • Betty Rilling pens winning May script for Ursinus coeds • Imre Kovacs urges Christian standards in Tuesday address • Should faculty exert control on Weekly ? • R. Mack named Bus Ad prexy; Gradwohl, McMillan get offices • Magazine names Ursinus in list of representative good colleges • Athletic Association to present annual minstrel show April 19 • Drummer and Schultz selected as headwaiters for coming year • Weekly offers fin to author of letter • Gaff , poll voted most controversial • Curtis scores close win in gala intramural night • Dennis named head of 1950 golf team; six matches carded • Softball belles aim to maintain record as five vets return • Fifteen man squad lifts coach\u27s hopes for winning season • Cox bows in AAU quarter-finals; Fords trip bruin nine 2-0 • Track vets sparkle in practice session with West Chester • Haverford\u27s Heberton hurls two-hitter; error costly for pitcher Ron Landes • Two letter winners, hopeful rookies vie for coed net spots • Coeds end schedule with decisive wins in hoop, pool tilts • Tischler, Harris cop leads in spring play • New \u27Weekly\u27 heads to be introduced at annual banquethttps://digitalcommons.ursinus.edu/weekly/1613/thumbnail.jp

The Ursinus Weekly, April 18, 1949

Council adopts petitions for \u2749 coed elections • Junior men to elect annual prom queen • Black-faced belles plan initial debut for minstrel frolic • Organizations seek support of students in worthy projects • Y commission lists letters, trip, talk in year\u27s activities • Sororities plan party for frosh; Movie, social to highlight affair • FTA elects Heist to presidency for \u2749-\u2750 schedule of activities • What do you demand of your ideal man? • Bruins drop 4-3 decision in ten inning ball game • Five sports events fill week\u27s roster • Sixteen get awards for winter sports • Students find appeal in Curtain Club actshttps://digitalcommons.ursinus.edu/weekly/1614/thumbnail.jp

The Ursinus Weekly, May 9, 1949

Ursinus to acquire fad of lettuce box by Chatlos, Carson • Pageant, play to highlight annual May Day events • Weekly board selects Leeming as \u2749-\u2750 editor • News writer wins mention for essay in national contest • Parliament speaker ends forum season with British theme • WSGA sets banquet to install officers • Lincoln group plans Y vespers program • Hospitality crew set to serve visitors over gala week-end • Junior class to elect officers Wednesday for last college year • MSGA schedules elections for class representatives • Dressler to address pre-meds on tuberculosis at last meeting • Weekly takes peek at past and future of collegiate male • Ursinus claims Missouri pianist • Ursinus bows 80-46; Kennedy sets record • Bearettes win 15-2 in three hit game against Bryn Mawr • Bears trip F&M 7-3 as Stauffer hurls • Bruins drop close meet with Albright speedsters • Netmen fail to win in two more tries • Rain causes delay in campus softball; four games played • Ursinus selects Spangler to assist coaching staff • Links squad bows to Garnet, Albright • Bears elect to join grid hall of fame • Curtain rings down on last group play • Freshmen produce atmosphere with moonlight mood propshttps://digitalcommons.ursinus.edu/weekly/1617/thumbnail.jp

VLA-ANGST: A high-resolution HI Survey of Nearby Dwarf Galaxies

We present the "Very Large Array survey of Advanced Camera for Surveys Nearby Galaxy Survey Treasury galaxies (VLA-ANGST)." VLA-ANGST is a National Radio Astronomy Observatory Large Program consisting of high spectral (0.6-2.6 km/s) and spatial (~6") resolution observations of neutral, atomic hydrogen (HI) emission toward 35 nearby dwarf galaxies from the ANGST survey. ANGST is a systematic HST survey to establish a legacy of uniform multi-color photometry of resolved stars for a volume-limited sample of nearby galaxies (D\lesssim4 Mpc). VLA-ANGST provides VLA HI observations of the sub-sample of ANGST galaxies with recent star formation that are observable from the northern hemisphere and that were not observed in the "The HI Nearby Galaxy Survey" (THINGS). The overarching scientific goal of VLA-ANGST is to investigate fundamental characteristics of the neutral interstellar medium (ISM) of dwarf galaxies. Here we describe the VLA observations, the data reduction, and the final VLA-ANGST data products. We present an atlas of the integrated HI maps, the intensity-weighted velocity fields, the second moment maps as a measure for the velocity dispersion of the HI, individual channel maps, and integrated HI spectra for each VLA-ANGST galaxy. We closely follow the observational setup and data reduction of THINGS to achieve comparable sensitivity and angular resolution. A major difference, however, is the high velocity resolution of the VLA-ANGST observations (0.65 and 1.3km/s for the majority of the galaxies). The VLA-ANGST data products are made publicly available at: https://science.nrao.edu/science/surveys/vla-angst. With available star formation histories from resolved stellar populations and lower resolution ancillary observations from the FIR to the UV, VLA-ANGST will enable detailed studies of the relationship between the ISM and star formation in dwarf galaxies on a ~100 pc scale.Comment: 64 figures, grouped into 32. 115 pages, accepted for publication in the Astronomical Journa

The Ursinus Weekly, April 25, 1949

Cancer drive opens on Ursinus campus to fill urgent need • Cub and Key receives seven juniors • Club 49 announces re-opening April 29 with Louie manager • Annual tapping honors campus leaders at butterfly ball • British labor man to address forum on labor movement • Men\u27s government okays concessions in student business • Thespians to depict individualists\u27 life in May production • Steele to consider scripture reliability • Warren takes lead in May Day frolic • ICG delegates to visit capital, observe legislature in action • Relax, reflect in record room • What would you demand of your ideal woman? • Darkie ensemble whams fellow students in deluge of cracks and various routines • Adair blanks bruin nine; Explorers explode at bat • Spring inaugurates interdorm softball • Baseballers break losing jinx; Russ Binder sets new record • Quay pitches brilliantly in relief role; Leander leads batsmen with four hits • Sprint star runs \u27100\u27 in 9.8 seconds as bruins bow to Haverford 79-47 • Softballers win 11-0 in exhibition game with Garnet coeds • Coach Dennis hopes to rejuvenate golf for \u2749 campaign • Muddy courts delay opening of season with Elizabethtown • Belated tennis season begins; Meet Bryn Mawr on Wednesday • Juniors crown Neill queen of evening at \u2749 butterfly ballhttps://digitalcommons.ursinus.edu/weekly/1615/thumbnail.jp

A Multiwavelength View of a Mass Outflow from the Galactic Center

The Galactic center (GC) lobe is a degree-tall shell of gas that spans the central degree of our Galaxy. It has been cited as evidence for a mass outflow from our GC region, which has inspired diverse models for its origin. However, most work has focused on the morphology of the GC lobe, which has made it difficult to draw strong conclusions about its nature. Here, I present a coherent, multiwavelength analysis of new and archival observations of the GC lobe. Radio continuum emission shows that the GC lobe has a magnetized layer with a diameter of 110 pc and an equipartition field strength ranging from 40 to 100 $\mu$G. Recombination line emission traces an ionized shell nested within the radio continuum with diameter of 80 pc and height 165 pc. Mid-infrared maps at 8 and 15 $\mu$m show that the GC lobe has a third layer of warm dust and PAH-emission that surrounds the radio continuum shell with a diameter of 130 pc. Assuming adiabatic expansion of the gas in the GC lobe, its formation required an energy input of about $5\times10^{52}$ ergs. I compare the physical conditions of the GC lobe to several models and find best agreement with the canonical starburst outflow model. The formation of the GC lobe is consistent with the currently observed pressure and star formation rate in the central tens of parsecs of our Galaxy. Outflows of this scale are more typical of dwarf galaxies and would not be easily detected in nearby spiral galaxies. Thus, the existence of such an outflow in our own Galaxy may indicate that it is relatively common phenomenon in the nuclei of spiral galaxies. (Abridged)Comment: Accepted to ApJ. 15 pages, 8 (compressed) figure

Synthetic HI observations of a simulated spiral galaxy

Using the Torus radiative transfer code we produce synthetic observations of the 21 cm neutral hydrogen line from an SPH simulation of a spiral galaxy. The SPH representation of the galaxy is mapped onto an AMR grid, and a ray tracing method is used to calculate 21 cm line emission for lines of sight through the AMR grid in different velocity channels and spatial pixels. The result is a synthetic spectral cube which can be directly compared to real observations. We compare our synthetic spectral cubes to observations of M31 and M33 and find good agreement, whereby increasing velocity channels trace the main disc of the galaxy. The synthetic data also show kinks in the velocity across the spiral arms, evidence of non-circular velocities. These are still present even when we blur our data to a similar resolution as the observations, but largely absent in M31 and M33, indicating those galaxies do not contain significant spiral shocks. Thus the detailed velocity structure of our maps better represent previous observations of the grand design spiral M81.Comment: MNRAS accepted; 13 pages; 11 figures, 4 in colou

The Ursinus Weekly, February 14, 1949

Enrollment hits 1009 as 28 new students begin college life • Richardson Dilworth to speak tonight: former mayoralty nominee to expose corruption in Philadelphia government • Floy Lewis named queen • Frats begin rushing week • Lauterbach outlines proposed US policy in mid-week forum • Frosh girls slated to receive colors at annual program • Local NSA leaders choose Philadelphia for convention site • How could your college life be improved? • B-listers take lead by tripping imbeciles • Retreat held by Y; letters to Congress sent by commission • Student life of faculty members uncovered in old yearbooks • Popular couple wins laurels in print for countless services to student body • Ingber paces Cadets as bears yield 59-40 • Coeds score second win as Rosemont bows 34-23 • Beaver meet looms as local mermaids improve technique • Unbeaten record slashed as bruinettes lose 32-24 • Initial match fatal as Ford grapplers wallop bruins 23-11 • Bears drop fifth tilt as Drexel wins 75-61 • Jay Vees drop two; one point decides as PMC wins 45-44 • Pettit tops offense as junior varsity captures two wins • Three tilts listed for opening night of inter-dorm loophttps://digitalcommons.ursinus.edu/weekly/1607/thumbnail.jp