Zobrazeno 1 - 10
of 768
pro vyhledávání: '"pre-main sequence [stars]"'
Publikováno v:
The Astrophysical Journal Letters, Vol 977, Iss 1, p L28 (2024)
We present spectroscopic and photometric observations of Bernhard-2, which was previously identified as a candidate system that hosts a misaligned circumbinary disk. Our spectroscopic measurements confirm that Bernhard-2 indeed contains an eccentric
Externí odkaz:
https://doaj.org/article/a0b4af5934284fb5a74d415187e303ef
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:
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
Autor:
Alekseev, I.1 ilya-alekseev@mail.ru
Publikováno v:
Astrophysics. Jun2014, Vol. 57 Issue 2, p254-271. 18p.
Autor:
Konstantin V. Getman, Eric D. Feigelson, Abygail R. Waggoner, L. Ilsedore Cleeves, Jan Forbrich, Joe P. Ninan, Oleg Kochukhov, Vladimir S. Airapetian, Sergio A. Dzib, Charles J. Law, Christian Rab
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 2, p 195 (2024)
The most powerful stellar flares driven by magnetic energy occur during the early pre-main-sequence (PMS) phase. The Orion Nebula represents the nearest region populated by young stars, showing the greatest number of flares accessible to a single poi
Externí odkaz:
https://doaj.org/article/5751438bfc2d4937b712d24f83ae90fa
Publikováno v:
The Astronomical Journal, Vol 168, Iss 6, p 251 (2024)
Gaia Data Release 3 (DR3) has provided the largest and most astrometrically precise catalog of nearby stars to date, allowing for a more complete membership census of nearby, young stellar moving groups. These loose associations of young (age
Externí odkaz:
https://doaj.org/article/7ffd860ffc4241c7bce3cbf83b1afdae
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 1, p 25 (2024)
X-rays have significant impacts on cold, weakly ionized protoplanetary disks by increasing the ionization rate and driving chemical reactions. Stellar flares are explosions that emit intense X-rays and are the unique source of hard X-rays with an ene
Externí odkaz:
https://doaj.org/article/5b9c72b054ae45e3b885d146c98c3386
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 1, p 99 (2024)
Young associations record complete histories of star-forming events through their demographics and dynamics, and Gaia has greatly expanded our knowledge of these associations. We present the first structural and dynamical overview study of the Cep-He
Externí odkaz:
https://doaj.org/article/5db31550fedc4b48a56779ad7dae9ea3
Measuring the Spot Variability of T Tauri Stars Using Near-infrared Atomic Fe and Molecular OH Lines
Publikováno v:
The Astrophysical Journal, Vol 973, Iss 2, p 124 (2024)
As part of the Young Exoplanets Spectroscopic Survey, this study explores the spot variability of 13 T Tauri Stars (TTSs) in the near-infrared H band, using spectra from the Immersion GRating INfrared Spectrometer. By analyzing effective temperature
Externí odkaz:
https://doaj.org/article/e79010b885af4bb1a99080b5e4ea2f2c
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