Zobrazeno 1 - 10
of 404
pro vyhledávání: '"Parker, Quentin"'
Context. We have developed deep learning (DL) and AI-based tools to search extant narrow-band wide-field H$\alpha$ surveys of the Galactic Plane for elusive planetary nebulae (PNe) which are hidden in dense star fields towards the Galactic center. Th
Externí odkaz:
http://arxiv.org/abs/2408.09482
We have undertaken a deep investigation of a well defined sample of 136 PNe located in a 10x10 degree central region of the Galactic Bulge observed with the ESO VLT and supplemented by archival HST imagery. These studies have provided precise morphol
Externí odkaz:
http://arxiv.org/abs/2401.13257
Autor:
de Kuijper, Kees, Diwan, Rishank, Pal, Partha Sarathi, Ritter, Andreas, Parkinson, Pablo M. Saz, Kong, Andy C. T., Parker, Quentin A.
Publikováno v:
Exp Astron 57, 16 (2024)
The low-energy $\gamma$-ray (0.1-30 MeV) sky has been relatively unexplored since the decommissioning of the COMPTEL instrument on the Compton Gamma-Ray Observatory (CGRO) satellite in 2000. However, the study of this part of the energy spectrum (the
Externí odkaz:
http://arxiv.org/abs/2401.09735
Autor:
Ritter, Andreas, Parker, Quentin A., Lykou, Foteini, Zijlstra, Albert A., Guerrero, Martin A., Du, Pascal Le
On August 25th 2013 Dana Patchick from the "Deep Sky Hunters" (DSH) amateur astronomer group discovered a diffuse nebulosity in the Wide-field Infrared Survey Explorer (WISE) mid-IR image archive that had no optical counterpart but appeared similar t
Externí odkaz:
http://arxiv.org/abs/2311.03700
AI Techniques for Uncovering Resolved Planetary Nebula Candidates from Wide-field VPHAS+ Survey Data
AI and deep learning techniques are beginning to play an increasing role in astronomy as a necessary tool to deal with the data avalanche. Here we describe an application for finding resolved Planetary Nebulae (PNe) in crowded, wide-field, narrow-ban
Externí odkaz:
http://arxiv.org/abs/2311.02607
In this, the third of a series of papers, we present well determined chemical abundances for 124 Planetary nebulae (PNe) in the Galactic bulge from deep, long-slit FORS2 spectra from the 8.2 m ESO Very Large telescope (VLT). Prior to this work there
Externí odkaz:
http://arxiv.org/abs/2311.01836
Autor:
Diwan, Rishank, de Kuijper, Kees, Pal, Partha Sarathi, Ritter, Andreas, Parkinson, Pablo Saz, Kong, Andy C. T., Parker, Quentin
The observation of the low-energy $\gamma$-ray (0.1-30 MeV) sky has been significantly limited since the COMPTEL instrument was decommissioned aboard the Compton Gamma-ray Observer (CGRO) satellite in 2000. The exploration of $\gamma$-ray photons wit
Externí odkaz:
http://arxiv.org/abs/2308.09266
Publikováno v:
ApJL, 951, 2, L44 (2023)
We report observations of a remarkable major axes alignment nearly parallel to the Galactic plane of 5{\sigma} significance for a subset of bulge "planetary nebulae" (PNe) that host, or are inferred to host, short period binaries. Nearly all are bipo
Externí odkaz:
http://arxiv.org/abs/2307.07140
Autor:
Ouyang, Xu-Jia, Zhang, Yong, Zijlstra, Albert, Zhang, Chuan-Peng, Nakashima, Jun-ichi, Parker, Quentin A
The young, compact, very high surface brightness but low excitation planetary nebula (PN) BD+303639 is one of the very few PNe that have been reported to exhibit the 21cm HI emission line. As part of a long-term programme to search for circumstellar
Externí odkaz:
http://arxiv.org/abs/2305.13598
Autor:
De Marco, Orsola, Akashi, Muhammad, Akras, Stavros, Alcolea, Javier, Aleman, Isabel, Amram, Philippe, Balick, Bruce, De Beck, Elvire, Blackman, Eric G., Boffin, Henri M. J., Boumis, Panos, Bublitz, Jesse, Bucciarelli, Beatrice, Bujarrabal, Valentin, Cami, Jan, Chornay, Nicholas, Chu, You-Hua, Corradi, Romano L. M., Frank, Adam, Garcia-Segura, Guillermo, Garcia-Hernandez, D. A., Garcia-Rojas, Jorge, Gomez-Llanos, Veronica, Goncalves, Denise R., Guerrero, Martin A., Jones, David, Karakas, Amanda I., Kastner, Joel H., Kwok, Sun, Lykou, Foteini, Manchado, Arturo, Matsuura, Mikako, McDonald, Iain, Monreal-Ibero, Ana, Monteiro, Hektor, Baez, Paula Moraga, Morisset, Christophe, Miszalski, Brent, Mohamed, Shazrene S., Montez Jr., Rodolfo, Nordhaus, Jason, de Oliveira, Claudia Mendes, Osborn, Zara, Otsuka, Masaaki, Parker, Quentin A., Peeters, Els, Quint, Bruno C., Quintana-Lacaci, Guillermo, Redman, Matt, Ruiter, Ashley J., Sabin, Laurence, Contreras, Carmen Sanchez, Santander-Garcia, Miguel, Seitenzahl, Ivo, Sahai, Raghvendra, Soker, Noam, Speck, Angela K., Stanghellini, Letizia, Steffen, Wolfgang, Toala, Jesus A., Ueta, Toshiya, Van de Steene, Griet, Villaver, Eva, Ventura, Paolo, Vlemmings, Wouter, Walsh, Jeremy R., Wesson, Roger, van Winckel, Hans, Zijlstra, Albert A.
Publikováno v:
Nature Astronomy, 2022, Vol. 6, p. 1421
Planetary nebulae (PNe), the ejected envelopes of red giant stars, provide us with a history of the last, mass-losing phases of 90 percent of stars initially more massive than the Sun. Here, we analyse James Webb Space Telescope (JWST) Early Release
Externí odkaz:
http://arxiv.org/abs/2301.02775