Reet Se ~~ wo PULS‘ AS: OBSERVATIONS OF SPECTRA, Qoldft ML ftatifernta inet, of Teck, Pasadena). Seclence, an robaty 7) 2e7 ay, eek et thee anamic erecticg:gine of two of the recently discovered pul‘ting T*4i@ eouroes were Obtalned. The date provide the instantanomia apactum and the Ume-frequemey history of the signals evee «a bandwidth of 3 Miia. (auth) Wa ee Dea Lae 8443 STELLAR ROTATION. Eppe. Harland W. (Unie. » Mat. Acad, Sci, U. 8, 66; ot Callformia, Lom Angeles}, hi-* May 1768). A perturbation techaique {a described for appronimating the Intarsal etrugture of rotationally distorted stare, {M.0. .7.) COSMOLOGICAL RED-GHIFT LAW FOR RADGO . Censir cofections are raised 60 bn the validity of the wrotyitems. rusunclogioal models om theoretical and ebeetvationsl Qtruods. The probabls preeesce of cbecurating taterpetacttc ee em. ete raafter potnted owt Ty Ewicky, sugmedts the wmulleation of radia magnitude s of optically ident ified radio fources to teat the red aht~-megattede rin ohebet lived gnedhrwridler observations] : wtatletion of red shih- oe peer eee ee onene Vol 22, Ma NUCLEAR SCIENCE ABSTRACTS Pha? “? 1 Kae etn tee Os - 14 D, (Wnty. of Manchester, Jodrell Bank, Fog.) Nature (Lond, 218: 1038-8 (June 16, 1968), Strdies at 11 cm were extended to the four kee pore leora Observations were made with the Mark 2 teicactpe at 2c Mur in May 1068, Puleee were clearly detected from OP O96 sad Ftd Their arrtval times agreed with those experted from companies with observations at 406 MHz using establiahed le cergieo ng ot For CP 0634 end 12928 only upper limits could te placer on 1 om erolasion. Dati sre given for peak flux density and mean patie energy, and romilis ere discussed. (1/15 3047 INTERSTELLAR MAGNETIC FIELD, Roger, 8. 5. Momiston Radio Gwuter, W, L, M, Obearvatory, Pentioter, Can}: Matere (London), 2181 10%6¢lune 15, 19°91. An upper limtt of <2 « 10-7 to the interateitar magnetic field in the Mreotion of the CP 0980, derived from Farndny rotation measurements, hag been reported (Smith, Natures 714 336 (1068})}, This value, for & component directed towarce the Earth, ia much lower then previows estimates. It fe ales noted that the eontributiog to the total retation from the Farth'y fone sphere implied by this Limit is toneiderably fower than would he exported for the lowal time of the observations. In the prerert communication it to guggected that the observations are compe! mie wits ap interstellar field component of about 100‘ gacse, dire: tec! towards the sverce and with a larger rotation contriburton from the tono-phere, bh seemae le to conclude that the trial rotation rf +4 rwttane observed by Bmith could be made up of +19 radians in the ioncephere and - 6 radians {0 interstellar epece. This tatacpretation ts consistent with the cbaer vation rach: sverces may be portage an indication that the red shifts cf thease objects are net eattrely of cosmological origin. tantly that the total radiation wae fn the same sense an the fone: cher! ~ covtribetiqn, and implies an interstellar magnetic fteld four times larger than Smith's upper limit, (UK) Mee PRASE ‘NTEGRALS IN PULSATION THEORY OF VAR'ARLE STARS, de Frettes Pacheco, J. A. Gmertiutp Tasenlogies de Aeronautics, Sao Joee doe Campos, Spainy. SOURCES, Greeff, Gy Rofft, G.: Vigottl, M. An. aed srasi], Clano,, 30: 413-iDec, $1, 1687). A cothod of calceius of the pulsation constant Q, itn the pulsation theory of variable etars, is discunsed through the oa)Ccules of the syetem phase tategrals. (amth) mt THR DOPPLER EFFECT AND ITS DISPLACEMENT Tow: | THE Pr iN RATIONAL MECHANICS: APPLICATIONS AD CK RIMtN TST VERIFICATIONS. Letsean, Jean. Appl Opt, P92- 14% Tely 1968), (In Freach, Sauer arte’ wward the red of the galaxy NGC 5668 for a » bean of 21 om, ¢ mexaured tn radicastronomy with a mear and x’ measured (a optics with « spectrograph, not being equal, tt follows that the speed of light from a galaxy te not eusal tthet of a galaxy ¢ which is measared on Earth from * vt-tunary soutce. The Doppler empérical formula cannot be et) piained in classical mechanig¢ma aince it ta in contradiction with ft. As for the theory of relativity & = ¢ from s postu’ uw ead = 2. Hone considers the Universe represented cu. ‘ree‘coempional space (H}, cnon-Euchidian, with Fuciidiag comercion »itged ina Alemannias four-dimension space (EF), a certain universal time. ike that of an astronmmer, can be defined and ite ccurae calculted is relation to this time. it will necessarily be confounded with the atomle clock time, but & = o and 2’ « £: the Doppler tormula la not accurate. However, © and ¢ as well ae and: are eo close tp all the experiments carried out on Earth, cen, when an artificial satelitte is used. that the errors mada a using the Doppler formula are clearly tnfsrior to experimental errore, (uth) aT PULSAR Io EFFECT, Dougiae- Hamilton, D, A. (Harvard Coll, Observatory, » Mass,), Nature (Loe Hoe). 218: 1035 June 16, 19681, * hag bean suggested that a small orbiting companion of a peutren star might trigger pulees of radio emisrion, in a way anylogsus to the Io effect in Jupiter. A satellite of mass m < 107g was prcpored, to avold difficulties with gravitational radiation, slong at Re 10 em to gives& period of the ordar observed in peisges, Thin singemtd ad, and it is luded that ar octhitic: mechaniar ‘oe polasre appeare to be exchkted, unless he etl « suggestion of ponrediatiog states In free-fall motion fe a sertad, EK Ff Ke MPs IN THE EARLY SOLAR SYSTEM, Reynolds, ! “. ff n'e.of California, Berkeley), Nature (London), 2151 Ea TT VARY, > ty teerp the pheten! m-244xehen and fodine -129/ . 1 ate spark nde’ tie metaohites could confirm rieetatecs to ot radloactivities were eynthePoets ge on Te ay theta meegaas fagthy GUN} ae TOR ATP ON Tr yg temps me war ES AL Sy pe teem RB Tem Sok bri Py Malek, 30671) PRELIMINARY RESULTS OF PULSATING RATH (inte. of Bolcgra), Mature (London), 718: 1036-7 Dune 15, 194%). A programme of obeervetions of pulears har been <'art.i at 405 MHz using the N-S arm of the Northern Cross et ‘telescope. The long transtt time (4 min) in the antenna fan bes allows observation of tundreds of pulgea at eas h irar baboon raalt!-beam arrangement enables rapid and presike decors. rast of declination. Sources CP 0956, 1138 and 1919 Fave geo fer beet observed, but pot CP 0834. Vatues of & are tabulated. A e‘ee: cant difference wan apparent between the bebis tor of CP ire and that of CP 2133 and 0950 with regard to the poiee heirt! in a train of pulaes. CP 1919 showed traina of puleer ali wees almost the same height, whereas the other two sources shee! a saccedsion of markedly different pulses. An atrempt wey mes to find some sort of correlation between the pesk values rf the aucogesive pulses of a given source. CP 1919 amt ¢ 159 gee ra indication of significant deviation from a aeque ws «f ranior values, but CP 1133 showed some sort of reguler pattern, «7 ~ sisting of a fluctuation of the average pulse height with a pe twice that of the pulse repetition. A prefiminary value aby we for the ratio between the averag: peak vaiuc of Soren pulacy and that of ‘‘odd'’ pulses waa 150 20.18. Ehis modulation weld support the concept of “‘something’’ osrillating beth tn the furdamental mode and in some higher order mode t'K) 38472 GRAVITATIONAL REDSHIFT AND QUASI-STFULAR OBJECTS. Hameon-Anttila, KA, (Unley. of Oulv, Finland), Nature (Loudon), 2181 1040-1 ume 15, 1968). The chief ertticiam of the gravitational interpretarion of the red ahift {n the spectra of quasara je concerned with three as- pecta — high electron denalty, differential gravitational rect abit, and the smal! thickseus of the fine-emitting layer. There are some phenomena suggeating that quasars are not at casmricgt: 3] distancea, and it in interesting to try to conatrect modeta in a) ten difficulties imposed by gravitational red ehift aca avoided The mode! atudied by Greenstein and Schmidt (Astrophys J. 146-1 419640 Ja modified hy assundyg that quasars are relatively cool hates having eruptive afmognieres, the erupulong rising ma dslly from the surface and then falling back. lf the surface temperature fag. Meleptt, low the entire chaerved spectrum originates fin the emit. T2cer is which rapid nonthermal particles and gae trasaen Penetrating each ober give an finpresaion of high elec - tran temperature. The thickness of the emitting layar AR fs then determined ant by ionization and excitation tmin by the average helghi te which the eruptions are slle to cise. Lo La argamed thit gvas ttation ¢a the main factor determining thia Relpe. Ap ender - of-magnitude entimate for AR ie obtatuad trom the ene ratccis fi-isne equations of geodesics in Schwarceh d= ¢eter spony aps” The aravicational tine broadening fa integers nt. f ret abife gt Proportional to the aquare of the Dryi der cr trp Fo ow pabbotes deve te obeervent Dometic taite i wi Bole deg r Cope eg Re oe steed tr ge gta hy ' . hoes yout. wat SoneST SG pene A wba ne was