470 research outputs found
The M31 pixel lensing plan campaign : macho lensing and self-lensing signals
No full textA.G. was supported by NSF grant AST-1103471. M.D. is thankful to Qatar National Research Fund (QNRF), member of Qatar Foundation, for support by grant NPRP 09-476-1-078. P.J. acknowledges support by the Swiss National Science Foundation.We present the final analysis of the observational campaign carried out by the PLAN (Pixel Lensing Andromeda) collaboration to detect a dark matter signal in form of MACHOs through the microlensing effect. The campaign consists of about 1 month/year observations carried out over 4 years (2007-2010) at the 1.5 m Cassini telescope in Loiano (Astronomical Observatory of BOLOGNA, OAB) plus 10 days of data taken in 2010 at the 2 m Himalayan Chandra Telescope monitoring the central part of M31 (two fields of about 13′ × 12.′6). We establish a fully automated pipeline for the search and the characterization of microlensing flux variations. As a result, we detect three microlensing candidates. We evaluate the expected signal through a full Monte Carlo simulation of the experiment completed by an analysis of the detection efficiency of our pipeline. We consider both "self lensing" and "MACHO lensing" lens populations, given by M31 stars and dark matter halo MACHOs, in M31 and the Milky Way, respectively. The total number of events is consistent with the expected self-lensing rate. Specifically, we evaluate an expected signal of about two self-lensing events. As for MACHO lensing, for full 0.5(10-2) M☉ MACHO halos, our prediction is for about four (seven) events. The comparatively small number of expected MACHO versus self-lensing events, together with the small number statistics at our disposal, do not enable us to put strong constraints on that population. Rather, the hypothesis, suggested by a previous analysis, on the MACHO nature of OAB-07-N2, one of the microlensing candidates, translates into a sizeable lower limit for the halo mass fraction in form of the would-be MACHO population, f, of about 15% for 0.5 M☉ MACHOs.Peer reviewe
Le Manuscrit de Lyon n° C
No full textNovati Fr., Lafaye Georges. Le Manuscrit de Lyon n° C . In: Mélanges d'archéologie et d'histoire, tome 11, 1891. pp. 353-416
Le opere minori di Dante e i grandi maestri (Sabbadini e Novati)
No full textL'articolo analizza il contributo di Remigio Sabbadini e di Francesco Novati sul testo delle così dette opere minori di Dante (Egloghe ed Epistole). In una serie di lavori (e, per quanto riguarda Novati, di appunti inediti) Sabbadini e Novati hanno lasciato preziose considerazioni su queste opere di Dante, con una serie di proposte testuali ed esegetiche che ancora oggi hanno la loro validità. In particolare le carte inedite di Novati, che era stato incaricato di curare un'edizione critica delle lettere dell'Alighieri, offrono preziose indicazioni sulle possibili fonti adoperate da Dante
Ital. jana, janara
No full textNovati F. Ital. jana, janara. In: Romania, tome 35 n°137, 1906. p. 112
I codici francesi de' Gonzaga. Secondo nuovi documenti
No full textNovati F. I codici francesi de' Gonzaga. Secondo nuovi documenti. In: Romania, tome 19 n°74, 1890. pp. 161-200
II. L'ultima poesia di Gualterio di Châatillon
No full textNovati F. II. L'ultima poesia di Gualterio di Châatillon. In: Romania, tome 18 n°70, 1889. pp. 283-288
L'archimimus di Seneca ed il tombeor Nostre Dame
No full textNovati F. L'archimimus di Seneca ed il tombeor Nostre Dame. In: Romania, tome 25 n°100, 1896. p. 591
Un' avventura di Peire Vidal
No full textNovati F. Un' avventura di Peire Vidal. In: Romania, tome 21 n°81, 1892. pp. 78-81
Poesie musicali francesi de' sec. XIV e XV, tratte da mss. italiani
No full textNovati F. Poesie musicali francesi de' sec. XIV e XV, tratte da mss. italiani. In: Romania, tome 27 n°105, 1898. pp. 138-144
Rapports littéraires de l'Italie et de la France au XIe siècle
No full textNovati Francesco. Rapports littéraires de l'Italie et de la France au XIe siècle. In: Comptes rendus des séances de l'Académie des Inscriptions et Belles-Lettres, 54ᵉ année, N. 3, 1910. pp. 169-184
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