Zobrazeno 1 - 10
of 232
pro vyhledávání: '"Stellar accretion"'
Publikováno v:
The Astrophysical Journal Letters, Vol 973, Iss 2, p L40 (2024)
FU Ori objects are the most extreme eruptive young stars known. Their 4–5 mag photometric outbursts last for decades and are attributed to a factor of up to 10,000 increase in the stellar accretion rate. The nature of the accretion disk-to-star int
Externí odkaz:
https://doaj.org/article/1ccc446bc1934ace9de6feb8caa1ccdd
Autor:
Yi-Heng Chi, Jiahui Huang, Ping Zhou, Hua Feng, Xiang-Dong Li, Sera B. Markoff, Samar Safi-Harb, Laura Olivera-Nieto
Publikováno v:
The Astrophysical Journal Letters, Vol 975, Iss 2, p L28 (2024)
How black holes are formed remains an open and fundamental question in astrophysics. Despite theoretical predictions, it lacks observations to understand whether the black hole formation experiences a supernova explosion. Here we report the discovery
Externí odkaz:
https://doaj.org/article/6449c07f526648a4b92a3b46c4cfcbc1
Publikováno v:
The Astrophysical Journal Letters, Vol 972, Iss 1, p L4 (2024)
We present the first numerical study of gravitational waves (GWs) from collapsar disks, using state-of-the-art 3D general relativistic magnetohydrodynamic simulations of collapsing stars. These simulations incorporate a fixed Kerr metric for the cent
Externí odkaz:
https://doaj.org/article/2d37a7ef95394f999aedbe7807a805b1
Autor:
Chin-Fei Lee, Zhi-Yun Li, Tao-Chung Ching, Haifeng Yang, Shih-Ping Lai, Zhe-Yu Daniel Lin, Ying-Chi Hu
Publikováno v:
The Astrophysical Journal Letters, Vol 971, Iss 1, p L23 (2024)
The HH 111 protostellar disk has recently been found to host a pair of spiral arms. Here we report the dust polarization results in the disk as well as the inner envelope around it, obtained with the Atacama Large Millimeter/submillimeter Array in co
Externí odkaz:
https://doaj.org/article/9009eaa5c3f242e2b4ecf9923e848ff0
Autor:
Antonio Martínez-Henares, Qizhou Zhang, Izaskun Jiménez-Serra, Jesús Martín-Pintado, Nuria Huélamo, Sirina Prasad, James Moran, Alejandro Báez-Rubio
Publikováno v:
The Astrophysical Journal Letters, Vol 971, Iss 1, p L7 (2024)
Jets and disk winds arise from materials with excess angular momentum ejected from the accretion disks in forming stars. How these structures are launched and how they impact the gas within the innermost regions of these objects remains poorly unders
Externí odkaz:
https://doaj.org/article/f9ccef8099b74e7e82d11689d054ab72
Publikováno v:
The Astrophysical Journal Letters, Vol 969, Iss 1, p L6 (2024)
We analyzed the Atacama Large Millimeter/submillimeter Array (ALMA) band 6 data for the outbursting massive protostar M17 MIR. The ALMA CO J = 2–1 data reveal a collimated and bipolar north–south outflow from M17 MIR. The blueshifted outflow exhi
Externí odkaz:
https://doaj.org/article/2f4c24c67e2c4b91be5eaa1f9aa55785
Highly Significant Detection of X-Ray Polarization from the Brightest Accreting Neutron Star Sco X-1
Autor:
Fabio La Monaca, Alessandro Di Marco, Juri Poutanen, Matteo Bachetti, Sara Elisa Motta, Alessandro Papitto, Maura Pilia, Fei Xie, Stefano Bianchi, Anna Bobrikova, Enrico Costa, Wei Deng, Ming-Yu Ge, Giulia Illiano, Shu-Mei Jia, Henric Krawczynski, Eleonora Veronica Lai, Kuan Liu, Guglielmo Mastroserio, Fabio Muleri, John Rankin, Paolo Soffitta, Alexandra Veledina, Filippo Ambrosino, Melania Del Santo, Wei Chen, Javier A. Garcia, Philip Kaaret, Thomas D. Russell, Wen-Hao Wei, Shuang-Nan Zhang, Chao Zuo, Zaven Arzoumanian, Massimo Cocchi, Andrea Gnarini, Ruben Farinelli, Keith Gendreau, Francesco Ursini, Martin C. Weisskopf, Silvia Zane, Iván Agudo, Lucio A. Antonelli, Luca Baldini, Wayne H. Baumgartner, Ronaldo Bellazzini, Stephen D. Bongiorno, Raffaella Bonino, Alessandro Brez, Niccolò Bucciantini, Fiamma Capitanio, Simone Castellano, Elisabetta Cavazzuti, Chien-Ting Chen, Stefano Ciprini, Alessandra De Rosa, Ettore Del Monte, Laura Di Gesu, Niccolò Di Lalla, Immacolata Donnarumma, Victor Doroshenko, Michal Dovčiak, Steven R. Ehlert, Teruaki Enoto, Yuri Evangelista, Sergio Fabiani, Riccardo Ferrazzoli, Shuichi Gunji, Kiyoshi Hayashida, Jeremy Heyl, Wataru Iwakiri, Svetlana G. Jorstad, Vladimir Karas, Fabian Kislat, Takao Kitaguchi, Jeffery J. Kolodziejczak, Luca Latronico, Ioannis Liodakis, Simone Maldera, Alberto Manfreda, Frédéric Marin, Andrea Marinucci, Alan P. Marscher, Herman L. Marshall, Francesco Massaro, Giorgio Matt, Ikuyuki Mitsuishi, Tsunefumi Mizuno, Michela Negro, Chi-Yung Ng, Stephen L. O’Dell, Nicola Omodei, Chiara Oppedisano, George G. Pavlov, Abel L. Peirson, Matteo Perri, Melissa Pesce-Rollins, Pierre-Olivier Petrucci, Andrea Possenti, Simonetta Puccetti, Brian D. Ramsey, Ajay Ratheesh, Oliver J. Roberts, Roger W. Romani, Carmelo Sgrò, Patrick Slane, Gloria Spandre, Douglas A. Swartz, Toru Tamagawa, Fabrizio Tavecchio, Roberto Taverna, Yuzuru Tawara, Allyn F. Tennant, Nicholas E. Thomas, Francesco Tombesi, Alessio Trois, Sergey S. Tsygankov, Roberto Turolla, Jacco Vink, Kinwah Wu, IXPE Collaboration
Publikováno v:
The Astrophysical Journal Letters, Vol 960, Iss 2, p L11 (2024)
The Imaging X-ray Polarimetry Explorer measured with high significance the X-ray polarization of the brightest Z-source, Sco X-1, resulting in the nominal 2–8 keV energy band in a polarization degree of 1.0% ± 0.2% and a polarization angle of 8°
Externí odkaz:
https://doaj.org/article/582cb4d76fe245d79edc39483626104c
Autor:
Ciprian T. Berghea, Ammar Bayyari, Michael L. Sitko, Jeremy J. Drake, Ana Mosquera, Cecilia Garraffo, Thomas Petit, Ray W. Russell, Korash D. Assani
Publikováno v:
The Astrophysical Journal Letters, Vol 967, Iss 1, p L3 (2024)
We report the serendipitous discovery of a large edge-on protoplanetary disk in Pan-STARRS (PS1) images. PS1 has five broadband filters designated as g _P1 , r _P1 , i _P1 , z _P1 , and y _P1 with mean wavelengths 4866, 6215, 7545, 8679, and 9633 Å,
Externí odkaz:
https://doaj.org/article/e126cf9fb65e40b2aa9e68dd4d95a837
Publikováno v:
The Astrophysical Journal Letters, Vol 966, Iss 1, p L7 (2024)
Accreting main-sequence stars expand significantly when the mass accretion timescale is much shorter than their thermal timescales. This occurs during mass transfer from an evolved giant star onto a main-sequence companion in a binary system and is a
Externí odkaz:
https://doaj.org/article/d57ad713863b4b6aa23a89518c0204df
Autor:
Giulia Migliori, R. Margutti, B. D. Metzger, R. Chornock, C. Vignali, D. Brethauer, D. L. Coppejans, T. Maccarone, L. Rivera Sandoval, J. S. Bright, T. Laskar, D. Milisavljevic, E. Berger, A. J. Nayana
Publikováno v:
The Astrophysical Journal Letters, Vol 963, Iss 1, p L24 (2024)
We present the first deep X-ray observations of luminous fast blue optical transient (LFBOT) AT 2018cow at ∼3.7 yr since discovery, together with the reanalysis of the observation at δ t ∼ 220 days. X-ray emission is significantly detected at a
Externí odkaz:
https://doaj.org/article/00f566ea293e46778ab2f4f352b06703