Results 131 to 140 of about 386,435 (271)

Circumstellar dust shells of hot post-AGB stars

, 2004
Using a radiative transfer code (DUSTY) parameters of the circumstellar dust shells of 15 hot post-AGB stars have been derived. Combining the optical, near and far-infrared (ISO, IRAS) data of the stars, we have reconstructed their spectral energy ...
Gauba, G. Sarkar Nee, Parthasarathy, M.
core   +1 more source

Very Late-time JWST and Keck Spectra of the Oxygen-rich Supernova 1995N

The Astrophysical Journal
We present new JWST/MIRI Medium Resolution Spectroscopy and Keck spectra of SN 1995N obtained in 2022–2023, more than 10,000 days after the supernova (SN) explosion. These spectra are among the latest direct detections of a core-collapse SN, both through
Geoffrey C. Clayton, R. Wesson, Ori D. Fox, Melissa Shahbandeh, Alexei V. Filippenko, Bryony Nickson, Michael Engesser, Schuyler D. Van Dyk, WeiKang Zheng, Thomas G. Brink, Yi Yang, Tea Temim, Nathan Smith, Jennifer Andrews, Chris Ashall, Ilse De Looze, James M. Derkacy, Luc Dessart, Michael Dulude, Eli Dwek, Ryan J. Foley, Suvi Gezari, Sebastian Gomez, Shireen Gonzaga, Siva Indukuri, Jacob Jencson, Joel Johansson, Mansi Kasliwal, Zachary G. Lane, Ryan Lau, David Law, Anthony Marston, Dan Milisavljevic, Richard O’Steen, Justin Pierel, Armin Rest, Arkaprabha Sarangi, Matthew Siebert, Michael Skrutskie, Lou Strolger, Tamás Szalai, Samaporn Tinyanont, Qinan Wang, Brian Williams, Lin Xiao, Szanna Zsíros   +45 more
doaj   +1 more source

A Possible Indication of Metallic Iron in White Dwarf Dusty Disks from Their “Dirtiness”

The Astrophysical Journal
Polluted white dwarfs provide unique constraints on the elemental compositions of planetary bodies. The tidal disruption of accreting bodies is thought to form circumstellar dusty disks, whose emission spectra could offer additional insights into the ...
Ayaka Okuya, Satoshi Okuzumi, Aki Takigawa, Hanako Enomoto   +3 more
doaj   +1 more source

A GLIMPSE into the Nature of Galactic Mid-IR Excesses

, 2008
We investigate the nature of the mid-IR excess for 31 intermediate-mass stars that exhibit an 8 micron excess in either the Galactic Legacy Infrared Mid-Plane Survey Extraordinaire or the Mid-Course Space Experiment using high resolution optical spectra ...
Andrillat A., Ashok N. M., B. Uzpen, Boehm T., Brocklehurst M., Brosche P., C. Thom, Carroll J. A., Catala C., Catala C., D. R. Semler, Dachs J., Finkenzeller U., Finkenzeller U., H. A. Kobulnicky, Israel F. P., Jaschek C., Jaschek C., Jaschek M., Jaschek M., Jenniskens P., Kozok J. R., Monet D. G., Pogodin M. A., Royer F., Seidensticker K. J., Siess L., T. Bensby, The P. S., Viallefond F., Viallefond F., Viallefond F., Westin T. N. G., Wright A. E.   +33 more
core   +1 more source

Unveiling the progenitor of SN 2023ixf: Circumstellar dust and its implications for the red supergiant problem

Astronomy & Astrophysics
The nearby Type II supernova SN 2023ixf offers a critical test of the long-standing ‘red supergiant problem’ – the apparent absence of high-mass red-supergiant progenitors in pre-explosion imaging.
Ragosta Fabio, Simongini Andrea, Ambrosino Filippo, Imbrogno Matteo, Illiano Giulia, Piranomonte Silvia, Melandri Andrea, Di Palma Irene, Papitto Alessandro, Ghedina Adriano, Cecconi Massimo, Leone Francesco, González Manuel, Pérez Ventura Héctor, Hernandez Diaz Marcos, San Juan José   +15 more
doaj   +1 more source

Large dust particles in disks around T Tauri stars

, 2005
We present 7-mm continuum observations of 14 low-mass pre-main-sequence stars in the Taurus-Auriga star-forming region obtained with the Very Large Array with ~1.5" resolution and ~0.3 mJy rms sensitivity.
Adams, Adams, Altenhoff, Beckwith, Beckwith, Beckwith, C. J. Chandler, Calvet, Carpenter, Cernicharo, Cohen, Cohen, Cohen, D. J. Wilner, Draine, Dutrey, Dutrey, Duvert, Elias, Ghez, Guilloteau, Güdel, Haisch, Handa, Hartmann, Henning, Henning, Hildebrand, J. Rodmann, Jensen, Kenyon, Kenyon, Kitamura, Koerner, Koerner, Koerner, L. G. Mundy, Laor, Leinert, Loinard, Looney, Mannings, Mathieu, Mathieu, Mezger, Mitchell, Mundt, Mutschke, Najita, Natta, Ohashi, Olnon, Ossenkopf, Panagia, Prato, Rodriguez, Simon, Strom, Testi, Testi, Th. Henning, Weaver, Wilner, Wilner, Wilner, Wilner, Wright   +66 more
core   +1 more source

Observing dust settling and coagulation in circumstellar discs: Selected constraints from high resolution imaging

, 2010
Circumstellar discs are expected to be the nursery of planets. Grain growth within such discs is the first step in the planet formation process in the core-accretion gas-capture scenario.
Beckwith, Bjorkman, Blum, Boss, Brauer, Brown, Cuzzi, Draine, Draine, Duchêne, Dullemond, Dullemond, D’Alessio, Garaud, Guilloteau, Gullbring, Güttler, J. Sauter, Kamp, Kemper, Kessler-Silacci, Kim, Lada, Langkowski, Lucy, Mathis, McCabe, Meeus, Mie, Neuhäuser, Ormel, Ossenkopf, Pinte, Przygodda, Robitaille, S. Wolf, Sauter, Schegerer, Schegerer, Shakura, Sicilia-Aguilar, Sicilia-Aguilar, Simon, Stapelfeldt, Stapelfeldt, Thamm, Weidenschilling, Weidling, Weingartner, Wilking, Witt, Wolf, Wolf, Wolf, Wood   +54 more
core   +1 more source

Early Planet Formation in Embedded Disks (eDisk). XVII. A Compact but Structured Keplerian Disk and Large-scale Streamers Revealed in the Class I Protostellar System IRAS 04169+2702

The Astrophysical Journal
We present high-resolution (∼0 $\mathop{.}\limits^{^{\prime\prime} }$ 05; 8 au) dust continuum and molecular line observations toward the Class I protostellar system IRAS 04169+2702 in the Taurus B213 region, as part of the Atacama Large Millimeter ...
Ilseung Han, Woojin Kwon, Yusuke Aso, Nagayoshi Ohashi, John J. Tobin, Jes K. Jørgensen, Shigehisa Takakuwa, Leslie W. Looney, Yuri Aikawa, Christian Flores, Itziar de Gregorio-Monsalvo, Patrick M. Koch, Chang Won Lee, Jeong-Eun Lee, Zhi-Yun Li, Zhe-Yu Daniel Lin, Jinshi Sai, Travis J. Thieme, Jonathan P. Williams, Sacha Gavino, Miyu Kido, Shih-Ping Lai, Nguyen Thi Phuong, Alejandro Santamaría-Miranda, Hsi-Wei Yen   +24 more
doaj   +1 more source

Tracing large-scale structures in circumstellar disks with ALMA

, 2012
Planets are supposed to form in circumstellar disks. The gravitational potential of a planet perturbs the disk and leads to characteristic structures, i.e. spiral waves and gaps, in the disk's density profile.
Klahr, Hubert H., Ruge, Jan Philipp, Uribe, Ana L., Wolf, Sebastian   +3 more
core   +1 more source

87th Annual Meeting of the Meteoritical Society 2025: Abstracts

Meteoritics &Planetary Science, Volume 60, Issue S1, Page 30-350, August 2025.
wiley   +1 more source