Search results for "STELLA"

Teatro critico universal, ó Discursos varios en todo género de materias, para desengaño de errores comunes

Sig. a-c8, d4, A-Aa8, Bb6. - Inclou: La Verdad vindicada contra la medicina vindicada : Respuesta apologética, traducida del Latin en Castellano, y añadida por el Autor. - P. 347-380 Tomo tercero. - LVI, 395 p., [1] f. de làm El f. de làm. son figures geomètriques. - Alguna capital grav. als Preliminars. - Filets i altres ornaments tip Text amb algunes postil·les marginals. - Notes a peu de pag. - Reclams

Cartas eruditas, y curiosas : en que, por la mayor parte, se continua el designio del Theatro critico universal, impugnando, ó reduciendo á dudosas, …

Sig. a-c8, d4, A-Bb8, Cc4 Tomo tercero. - LVI, 208 [i.e.408] p Alguna capital grav. als Preliminars. - Filets Reclams. - Notes a peu de pag. als Preliminars. - Errates de pag.: 208 per 408

Cartas eruditas, y curiosas : en que, por la mayor parte, se continua el designio del Theatro critico universal, impugnando, ó reduciendo á dudosas, …

Sig. a-b8, c4, A-Aa8, Bb6. - Inclou amb port. pròpia: Conversion de un pecador / por Don Geronymo Montenegro, su verdadero autor; Y no el que algunos años há se figuró en la Gazeta de Zaragoza ; Añadidas unas Decimas espirituales por el mismo Autor. - P. 327-340 Tomo quarto. - XL, 394 p., [1] f. en bl Alguna capital grav. als Preliminars. - Filets Reclams. - Notes a peu de pag

Teatro critico universal, ó Discursos varios en todo género de materias, para desengaño de errores comunes

Sig. a-e8, f2, A-Cc8 Tomo primero. - [2], LXXXII, 414 p., [1] f. en bl Retrat de l'autor "Joachin Ballester la gravó. año 1765". - Alguna capital grav. als Preliminars. - Filets Notes a peu de pag. - Reclams. - Errates de pag

H-2, H-3(+) and the age of molecular clouds and prestellar cores

2012

Measuring the age of molecular clouds and prestellar cores is a difficult task that has not yet been successfully accomplished although the information is of paramount importance to help in understanding and discriminating between different formation scenarios. Most chemical clocks suffer from unknown initial conditions and are therefore difficult to use. We propose a new approach based on a subset of deuterium chemistry that takes place in the gas phase and for which initial conditions are relatively well known. It relies primarily on the conversion of H 3 + into H 2D + to initiate deuterium enrichment of the molecular gas. This conversion is controlled by the ortho/para ratio of H2 that i…

Oxygen depletion in dense molecular clouds: a clue to a low O2 abundance?

2011

Context: Dark cloud chemical models usually predict large amounts of O2, often above observational limits. Aims: We investigate the reason for this discrepancy from a theoretical point of view, inspired by the studies of Jenkins and Whittet on oxygen depletion. Methods: We use the gas-grain code Nautilus with an up-to-date gas-phase network to study the sensitivity of the molecular oxygen abundance to the oxygen elemental abundance. We use the rate coefficient for the reaction O + OH at 10 K recommended by the KIDA (KInetic Database for Astrochemistry) experts. Results: The updates of rate coefficients and branching ratios of the reactions of our gas-phase chemical network, especially N + C…

A KInetic Database for Astrochemistry (KIDA)

2012

We present a novel chemical database for gas-phase astrochemistry. Named the KInetic Database for Astrochemistry (KIDA), this database consists of gas-phase reactions with rate coefficients and uncertainties that will be vetted to the greatest extent possible. Submissions of measured and calculated rate coefficients are welcome, and will be studied by experts before inclusion into the database. Besides providing kinetic information for the interstellar medium, KIDA is planned to contain such data for planetary atmospheres and for circumstellar envelopes. Each year, a subset of the reactions in the database (kida.uva) will be provided as a network for the simulation of the chemistry of dense…

Astrophysics with the Laser Interferometer Space Antenna

2023

Full list of authors: Amaro-Seoane, Pau; Andrews, Jeff; Sedda, Manuel Arca; Askar, Abbas.; Baghi, Quentin; Balasov, Razvan; Bartos, Imre; Bavera, Simone S.; Bellovary, Jillian; Berry, Christopher P. L.; Berti, Emanuele; Bianchi, Stefano; Blecha, Laura; Blondin, Stephane; Bogdanovic, Tamara; Boissier, Samuel; Bonetti, Matteo; Bonoli, Silvia; Bortolas, Elisa; Breivik, Katelyn; Capelo, Pedro R.; Caramete, Laurentiu; Cattorini, Federico; Charisi, Maria; Chaty, Sylvain; Chen, Xian; Chruslinska, Martyna; Chua, Alvin J. K.; Church, Ross; Colpi, Monica; D'Orazio, Daniel; Danielski, Camilla; Davies, Melvyn B.; Dayal, Pratika; De Rosa, Alessandra; Derdzinski, Andrea; Destounis, Kyriakos; Dotti, Massi…

LeMMINGs III. The e-MERLIN legacy survey of the Palomar sample: exploring the origin of nuclear radio emission in active and inactive galaxies throug…

2021

Full list of authors: Baldi, R. D.; Williams, D. R. A.; Beswick, R. J.; McHardy, I.; Dullo, B. T.; Knapen, J. H.; Zanisi, L.; Argo, M. K.; Aalto, S.; Alberdi, A.; Baan, W. A.; Bendo, G. J.; Fenech, D. M.; Green, D. A.; Klöckner, H. -R.; Körding, E.; Maccarone, T. J.; Marcaide, J. M.; Mutie, I.; Panessa, F.; Pérez-Torres, M. A.; Romero-Cañizales, C.; Saikia, D. J.; Saikia, P.; Shankar, F.; Spencer, R. E.; Stevens, I. R.; Uttley, P.; Brinks, E.; Corbel, S.; Martí-Vidal, I.; Mundell, C. G.; Pahari, M.; Ward, M. J.

Relativistic simulations of black hole-neutron star coalescence: the jet emerges

2014

We perform magnetohydrodynamic simulations in full general relativity (GRMHD) of a binary black hole-neutron star on a quasicircular orbit that undergoes merger. The binary mass ratio is 3:1, the black hole initial spin parameter $a/m=0.75$ ($m$ is the black hole Christodoulou mass) aligned with the orbital angular momentum, and the neutron star is an irrotational $\Gamma=2$ polytrope. About two orbits prior to merger (at time $t=t_B$), we seed the neutron star with a dynamically weak interior dipole magnetic field that extends into the stellar exterior. At $t=t_B$ the exterior has a low-density atmosphere with constant plasma parameter $\beta\equiv P_{\rm gas}/P_{\rm mag}$. Varying $\beta$…