Zobrazeno 1 - 10
of 3 900
pro vyhledávání: '"Young stellar objects"'
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:
Madyson G. Barber, Pa Chia Thao, Andrew W. Mann, Andrew Vanderburg, Mayuko Mori, John H. Livingston, Akihiko Fukui, Norio Narita, Adam L. Kraus, Benjamin M. Tofflemire, Elisabeth R. Newton, Joshua N. Winn, Jon M. Jenkins, Sara Seager, Karen A. Collins, Joseph D. Twicken
Publikováno v:
The Astrophysical Journal Letters, Vol 973, Iss 1, p L30 (2024)
The youngest (
Externí odkaz:
https://doaj.org/article/ee28b51a340b48469f3c8696b2efd05e
Autor:
Kristina Monsch, Joshua Bennett Lovell, Ciprian T. Berghea, Gordian Edenhofer, Garrett K. Keating, Sean M. Andrews, Ammar Bayyari, Jeremy J. Drake, David J. Wilner
Publikováno v:
The Astrophysical Journal Letters, Vol 967, Iss 1, p L2 (2024)
We present resolved images of IRAS 23077+6707 (“Dracula’s Chivito”) in 1.3 mm/225 GHz thermal dust and CO gas emission with the Submillimeter Array (SMA) and optical (0.5–0.8 μ m) scattered light with the Panoramic Survey Telescope and Rapid
Externí odkaz:
https://doaj.org/article/e0db5de669374ec19daba69974aee62f
Autor:
Joshua Bennett Lovell, Garrett K. Keating, David J. Wilner, Sean M. Andrews, Meredith MacGregor, Ramisa Akther Rahman, Ramprasad Rao, Jonathan P. Williams
Publikováno v:
The Astrophysical Journal Letters, Vol 962, Iss 1, p L12 (2024)
We present evidence of variable 1.3 mm emission from the 1 to 3 Myr, spectral-type G2–G5 class III young stellar object (YSO), HD 283572. HD 283572 was observed on eight dates with the Submillimeter Array between 2021 December and 2023 May, with a
Externí odkaz:
https://doaj.org/article/6ee75a981d9f4f048f50e2768229df96
Autor:
Cheng-Han Hsieh, Héctor G. Arce, María José Maureira, Jaime E. Pineda, Dominique Segura-Cox, Diego Mardones, Michael M. Dunham, Aiswarya Arun
Publikováno v:
The Astrophysical Journal, Vol 973, Iss 2, p 138 (2024)
We surveyed nearly all the embedded protostars in seven nearby clouds (Corona Australis, Aquila, Chamaeleon I and II, Ophiuchus North, Ophiuchus, Serpens) with the Atacama Large Millimeter/submillimeter Array at 1.3 mm observations with a resolution
Externí odkaz:
https://doaj.org/article/4d9c251c93cc439dbc7ba142ca5e84f6
Autor:
Mary Barsony, Michael E. Ressler, Valentin J. M. Le Gouellec, Łukasz Tychoniec, Martijn L. van Gelder
Publikováno v:
The Astrophysical Journal, Vol 973, Iss 1, p 42 (2024)
We report the discovery of jets emanating from pre-main-sequence objects exclusively at mid-infrared wavelengths, enabled by the superb sensitivity of JWST’s Mid-Infrared Instrument Medium-Resolution Spectrometer. These jets are observed only in li
Externí odkaz:
https://doaj.org/article/8e12b601de454190ada44e0cce1aca2f
Autor:
Bo Reipurth, C. Briceño, T. R. Geballe, C. Baranec, S. Mikkola, A. M. Cody, M. S. Connelley, C. Flores, B. A. Skiff, J. D. Armstrong, N. M. Law, R. Riddle
Publikováno v:
The Astronomical Journal, Vol 168, Iss 4, p 143 (2024)
We have discovered that the H α emission-line star Haro 5-2, located in the 3–6 Myr old Ori OB1b association, is a young quadruple system. The system has a 2+2 configuration, with an outer separation of 2.″6 and with resolved subarcsecond inner
Externí odkaz:
https://doaj.org/article/06956be2c4284231b6662664f60cc52e
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 1, p 30 (2024)
We report the first arcsecond-resolution observations of the magnetic field in the ministarburst complex Sgr B2. SMA polarization observations revealed magnetic field morphology in three dense cores of Sgr B2 N(orth), M(ain), and S(outh). The total p
Externí odkaz:
https://doaj.org/article/c4d6b817cab447e1bbe5bd3f64ce2be7
Autor:
Venu M. Kalari, Ricardo Salinas, Hans Zinnecker, Monica Rubio, Gregory Herczeg, Morten Andersen
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 1, p 3 (2024)
Constraints on the binary fraction of massive young stellar objects (mYSOs) are important for binary and massive star formation theory. Here, we present speckle imaging of 34 mYSOs located in the Large Magellanic Cloud (1/2 Z _⊙ ) and Small Magella
Externí odkaz:
https://doaj.org/article/b502a2983e5149c9a6a21de2a49f27e5
Autor:
Geumsook Park, Doug Johnstone, Carlos Contreras Peña, Jeong-Eun Lee, Sheng-Yuan Liu, Gregory Herczeg, Steve Mairs, Zhiwei Chen, Jennifer Hatchell, Kee-Tae Kim, Mi-Ryang Kim, Keping Qiu, Yao-Te Wang, Xu Zhang, The JCMT Transient Team
Publikováno v:
The Astronomical Journal, Vol 168, Iss 3, p 122 (2024)
We present a comprehensive analysis of young stellar object (YSO) variability within the M17 Southwest Extension (M17 SWex), using 3.5 yr of monitoring data from the James Clerk Maxwell Telescope (JCMT) Transient Survey at submillimeter and 9 yr from
Externí odkaz:
https://doaj.org/article/ed04094cc26b432bb716c9e16b0f4ecc