Reactive Desorption of CO Hydrogenation Products under Cold Pre-stellar Core Conditions

Autor: Chuang, K-J, Fedoseev, G, Qasim, D, Ioppolo, S, van Dishoeck, EF, Linnartz, H

The astronomical gas-phase detection of simple species and small organic molecules in cold pre-stellar cores, with abundances as high as $\sim$$10^{-8}-10^{-9}$ n$_\text{H}$, contradicts the generally accepted idea that at $10$ K, such species should

Externí odkaz: http://arxiv.org/abs/1806.06215

Constraining the nature of the PDS 70 protoplanets with VLTI/GRAVITY

Autor: Wang, JJ, Vigan, A, Lacour, S, Nowak, M, Stolker, T, De Rosa, RJ, Ginzburg, S, Gao, P, Abuter, R, Amorim, A, Asensio-Torres, R, Bauböck, M, Benisty, M, Berger, JP, Beust, H, Beuzit, JL, Blunt, S, Boccaletti, A, Bohn, A, Bonnefoy, M, Bonnet, H, Brandner, W, Cantalloube, F, Caselli, P, Charnay, B, Chauvin, G, Choquet, E, Christiaens, V, Clénet, Y, Coudé Du Foresto, V, Cridland, A, De Zeeuw, PT, Dembet, R, Dexter, J, Drescher, A, Duvert, G, Eckart, A, Eisenhauer, F, Facchini, S, Gao, F, Garcia, P, Garcia Lopez, R, Gardner, T, Gendron, E, Genzel, R, Gillessen, S, Girard, J, Haubois, X, Heißel, G, Henning, T, Hinkley, S, Hippler, S, Horrobin, M, Houllé, M, Hubert, Z, Jiménez-Rosales, A, Jocou, L, Kammerer, J, Keppler, M, Kervella, P, Meyer, M, Kreidberg, L, Lagrange, AM, Lapeyrère, V, Le Bouquin, JB, Léna, P, Lutz, D, Maire, AL, Ménard, F, Mérand, A, Mollière, P, Monnier, JD, Mouillet, D, Müller, A, Nasedkin, E, Ott, T, Otten, GPPL, Paladini, C, Paumard, T, Perraut, K, Perrin, G, Pfuhl, O, Pueyo, L, Rameau, J, Rodet, L, Rodríguez-Coira, G, Rousset, G, Scheithauer, S, Shangguan, J, Shimizu, T, Stadler, J, Straub, O, Straubmeier, C, Sturm, E, Tacconi, LJ, Van Dishoeck, EF, Vincent, F, Von Fellenberg, SD, Ward-Duong, K, Widmann, F

We present K-band interferometric observations of the PDS 70 protoplanets along with their host star using VLTI/GRAVITY. We obtained K-band spectra and 100 $\mu$as precision astrometry of both PDS 70 b and c in two epochs, as well as spatially resolv

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::722de217f50d95e9ebb6aa8a5206c764

Robustness of N₂H⁺ as tracer of the CO snowline

Autor: van 't Hoff, MLR, Walsh, C, Kama, M, Facchini, S, van Dishoeck, EF

Context. Snowlines in protoplanetary disks play an important role in planet formation and composition. Since the CO snowline is difficult to observe directly with CO emission, its location has been inferred in several disks from spatially resolved AL

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=core_ac_uk__::09f86bfe2566b90104851406bdf4e486
https://eprints.whiterose.ac.uk/113521/1/aa29452-16.pdf

A primordial origin for molecular oxygen in comets: a chemical kinetics study of the formation and survival of O₂ ice from clouds to discs

Autor: Taquet, V, Furuya, K, Walsh, C, Van Dishoeck, EF

Molecular oxygen has been confirmed as the fourth most abundant molecule in cometary material (O2/H2O ∼ 4 per cent) and is thought to have a primordial nature, i.e. coming from the interstellar cloud from which our Solar system was formed. However,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=core_ac_uk__::d06be94e6ed2e9129cebc22360959845
https://eprints.whiterose.ac.uk/107101/7/MNRAS-2016-Taquet-S99-S115.pdf

Water in low-mass star-forming regions with Herschel

Autor: Schmalzl, M, Visser, R, Walsh, C, Albertsson, T, Van Dishoeck, EF, Kristensen, LE, Mottram, JC

Aims. Our aim is to determine the critical parameters in water chemistry and the contribution of water to the oxygen budget by observing and modelling water gas and ice for a sample of eleven low-mass protostars, for which both forms of water have be

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=core_ac_uk__::cd5fd84f23a82d7c6b4ce559577ff848
https://eprints.whiterose.ac.uk/107132/1/aa24236-14.pdf