Zobrazeno 1 - 10
of 68
pro vyhledávání: '"Antonella Natta"'
Autor:
Aleks Scholz, Koraljka Muzic, Victor Almendros-Abad, Antonella Natta, Dary Ruiz-Rodriguez, Lucas Cieza, Cristina Rodriguez-Lopez
Publikováno v:
The Open Journal of Astrophysics, Vol 7 (2024)
We report on a search for variability in the young brown dwarf SST1624 ($\sim$M7 spectral type, $M\sim 0.05\,M_{\odot}$), previously found to feature an expanding gaseous shell and to undergo quasi-spherical mass loss. We find no variability on times
Externí odkaz:
https://doaj.org/article/c70ac9afcd314f67963f303d2bbfb963
Autor:
Justyn Campbell-White, Carlo F. Manara, Myriam Benisty, Antonella Natta, Rik A. B. Claes, Antonio Frasca, Jaehan Bae, Stefano Facchini, Andrea Isella, Laura Pérez, Paola Pinilla, Aurora Sicilia-Aguilar, Richard Teague
Publikováno v:
The Astrophysical Journal, Vol 956, Iss 1, p 25 (2023)
PDS 70 is so far the only young disk where multiple planets have been detected by direct imaging. The disk has a large cavity when seen at submillimeter and near-infrared wavelengths, which hosts two massive planets. This makes PDS 70 the ideal targe
Externí odkaz:
https://doaj.org/article/58dafa2549024cab87a6b9d074e87621
Autor:
Robin T. Mentel, Rebeca Garcia Lopez, Pauline McGinnis, Antonella Natta, Fabrizio Massi, Alessio Caratti o Garatti
In this poster I present the first high-spectral resolution (R=115,000 for the optical, and R=50,000 for the NIR) unbiased survey of 25 Herbig Ae/Be stars performed with the instruments HARPS and GIANO at TNG. This is the first survey observing simul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a9d5fc8ebe46e0e70cea5ad9af139fa2
Autor:
Ilaria Pascucci, Antonella Natta, Carlo F. Manara, Nicolás T. Kurtovic, Luca Ricci, Paola Pinilla, Leonardo Testi, Feng Long, Myriam Benisty, Aleks Scholz
Context. The discovery of giant planets orbiting very low mass stars (VLMS) and the recent observed substructures in disks around VLMS is challenging planet formation models. Specifically, radial drift of dust particles is a catastrophic barrier in t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::26c3fc001d40c0d981dc21bdb3dc9199
http://arxiv.org/abs/2012.02225
http://arxiv.org/abs/2012.02225
Autor:
Thomas Henning, Sebastian Wolf, Yao Liu, Katharine G. Johnston, Johan Olofsson, Antonella Natta, Jan Philipp Ruge, Viki Joergens, Gael Chauvin, Mickael Bonnefoy, Robert Brauer, Henrik Beuther, Amelia Bayo, Javier Arancibia, Paola Pinilla
Publikováno v:
Proceedings of Frontier Research in Astrophysics – III — PoS(FRAPWS2018).
Even though the first observational evidence of the existence of isolated substellar objects dates from 1995, the heated debates surrounding these objects have not ceased. With masses below $\sim$0.072M$_{\odot}$ (and hence unable to sustain stable H
Autor:
Paola Pinilla, Katharine G. Johnston, Gael Chauvin, Yao Liu, Javier Arancibia, Thomas Henning, Johan Olofsson, Henrik Beuther, Mickael Bonnefoy, Robert Brauer, Amelia Bayo, Sebastian Wolf, Viki Joergens, Jan Philipp Ruge, Antonella Natta
Publikováno v:
The Astrophysical Journal
OTS44 is one of only four free-floating planets known to have a disk. We have previously shown that it is the coolest and least massive known free-floating planet ($\sim$12 M$_{\rm Jup}$) with a substantial disk that is actively accreting. We have ob
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2599b9e9f7f7a1a14dc3d99c3b4857bf
http://arxiv.org/abs/1705.06378
http://arxiv.org/abs/1705.06378
Autor:
Alexander Scholz, Antonella Natta, Ray Jayawardhana, Sebastian Daemgen, Daniel S Eastwood, Jane Greaves, Leonardo Testi
Brown dwarf disks are excellent laboratories to test our understanding of disk physics in an extreme parameter regime. In this paper we investigate a sample of 29 well-characterized brown dwarfs and very low mass stars, for which Herschel far-infrare
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3c72b949684c4724cb2636b32e713357
http://arxiv.org/abs/1607.07458
http://arxiv.org/abs/1607.07458
Publikováno v:
Astronomy & Astrophysics
Context. Transition disks (TDs) are circumstellar disks with inner regions highly depleted in dust. TDs are observed in a small fraction of disk-bearing objects at ages of 1-10 Myr. They are important laboratories to study evolutionary effects in dis
Autor:
Leonardo Testi, Antonella Natta
Publikováno v:
Astrophysics and Space Science. 313:113-117
We discuss the potential of ALMA for studying the formation of substellar objects. We first review briefly the various formation mechanisms proposed so far and stress the unique capability of ALMA to detect and study pre-brown dwarf cores and to conf
Autor:
Francesca Bacciotti, Leonardo Testi, Emma Whelan, Subu Mohanty, Thomas P. Ray, Antonella Natta, Sofia Randich, Ray Jayawardhana
Publikováno v:
Proceedings of the International Astronomical Union. 3:357-364
While numerous studies have been aimed at understanding the properties of young brown dwarfs relatively little exploration of their potential as drivers of outflows has occurred. Forbidden emission lines are important probes of outflows from young st