Zobrazeno 1 - 10
of 62
pro vyhledávání: '"FU Orionis stars"'
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
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 1, p 44 (2024)
We present a comprehensive analysis of the post-outburst evolution of the FU Ori object HBC 722 in optical/near-infrared (NIR) photometry and spectroscopy. Using a modified viscous accretion disk model, we fit the outburst epoch spectral energy distr
Externí odkaz:
https://doaj.org/article/699e2c9c8b0347efa8591c0b68630610
Autor:
Koshvendra Singh, Joe P. Ninan, Marina M. Romanova, David A. H. Buckley, Devendra K. Ojha, Arpan Ghosh, Andrew Monson, Malte Schramm, Saurabh Sharma, Daniel E. Reichart, Joanna Mikolajewska, Juan Carlos Beamin, Jura Borissova, Valentin D. Ivanov, Vladimir V. Kouprianov, Franz-Josef Hambsch, Andrew Pearce
Publikováno v:
The Astrophysical Journal, Vol 968, Iss 2, p 88 (2024)
EX Lupi, a low-mass young stellar object, went into an accretion-driven outburst in 2022 March. The outburst caused a sudden phase change of ∼112° ± 5° in periodically oscillating multiband lightcurves. Our high-resolution spectra obtained with
Externí odkaz:
https://doaj.org/article/2306adfb663847a2939b5386a67c20c2
Publikováno v:
The Astrophysical Journal, Vol 967, Iss 2, p 158 (2024)
Young stellar objects are thought to commonly undergo sudden accretion events that result in a rise in bolometric luminosity. These outbursts likely coincide with the onset of planet formation and could impact the formation of planets. The reason beh
Externí odkaz:
https://doaj.org/article/04a5be7c57cd4233990c0c2c4199d848
Autor:
A. S. Hales, A. Gupta, D. Ruíz-Rodríguez, J. P. Williams, S. Pérez, L. Cieza, C. González-Ruilova, J. E. Pineda, A. Santamaría-Miranda, J. Tobin, P. Weber, Z. Zhu, A. Zurlo
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 1, p 96 (2024)
We present Atacama Large Millimeter/submillimeter Array 12-m, 7-m, and Total Power Array observations of the FU Orionis outbursting system, covering spatial scales ranging from 160 to 25,000 au. The high-resolution interferometric data reveal an elon
Externí odkaz:
https://doaj.org/article/55f4b495543d4beaa57485ac93db679c
Publikováno v:
The Astrophysical Journal Letters, Vol 958, Iss 2, p L27 (2023)
We present evidence in support of the hypothesis that the young stellar object RNO 54 is a mature-stage FU Ori type source. The star was first cataloged as a “red nebulous object” in the 1980s but appears to have undergone its outburst prior to t
Externí odkaz:
https://doaj.org/article/f7eefbf1bb884af1ab7ee088a70dd7c8
Autor:
Philipp Weber, Sebastián Pérez, Alice Zurlo, James Miley, Antonio Hales, Lucas Cieza, David Principe, Miguel Cárcamo, Antonio Garufi, Ágnes Kóspál, Michihiro Takami, Joel Kastner, Zhaohuan Zhu, Jonathan Williams
Publikováno v:
The Astrophysical Journal Letters, Vol 952, Iss 1, p L17 (2023)
The formation of giant planets has traditionally been divided into two pathways: core accretion and gravitational instability. However, in recent years, gravitational instability has become less favored, primarily due to the scarcity of observations
Externí odkaz:
https://doaj.org/article/f2c6a812164043cb9d47237d16aeabf7
Publikováno v:
The Astrophysical Journal, Vol 958, Iss 2, p 140 (2023)
We follow up our photometric study of the postoutburst evolution of the FU Ori object V960 Mon with a complementary spectroscopic study at high dispersion that uses time series spectra from the Keck/HIgh Resolution Echelle Spectrograph. Consistent wi
Externí odkaz:
https://doaj.org/article/43d0a5c1a9a546989eaef348cadaf0a6
Publikováno v:
The Astrophysical Journal, Vol 957, Iss 1, p 8 (2023)
We report the serendipitous discovery of a giant mid-infrared outburst from a previously unknown source near a star-forming region in the constellation Monoceros. The source gradually brightened by a factor of 5 from 2014–2016 before an abrupt rise
Externí odkaz:
https://doaj.org/article/80c8ca34ecf748299c57df8d7644ab31
Autor:
Adolfo S. Carvalho, Lynne A. Hillenbrand, Franz-Josef Hambsch, Shawn Dvorak, Michael Sitko, Ray W. Russell, Victoria Hammond, Michael Connelley, Michael C. B. Ashley, Matthew J. Hankins
Publikováno v:
The Astrophysical Journal, Vol 953, Iss 1, p 86 (2023)
We study the evolution of the FU Ori object V960 Mon since its outburst, using available multiwavelength photometric time series over 8 yr, complemented by several epochs of moderate-dispersion spectrophotometry. We find that the source fading can be
Externí odkaz:
https://doaj.org/article/93c6084e0efe40be953739332250884f