Zobrazeno 1 - 10
of 2 617
pro vyhledávání: '"CIRCUMSTELLAR DUST"'
Autor:
Ilse De Looze, Dan Milisavljevic, Tea Temim, Danielle Dickinson, Robert Fesen, Richard G. Arendt, Jeremy Chastenet, Salvatore Orlando, Jacco Vink, Michael J. Barlow, Florian Kirchschlager, Felix D. Priestley, John C. Raymond, Jeonghee Rho, Nina S. Sartorio, Tassilo Scheffler, Franziska Schmidt, William P. Blair, Ori Fox, Christopher Fryer, Hans-Thomas Janka, Bon-Chul Koo, J. Martin Laming, Mikako Matsuura, Dan Patnaude, Mónica Relaño, Armin Rest, Judy Schmidt, Nathan Smith, Niharika Sravan
Publikováno v:
The Astrophysical Journal Letters, Vol 976, Iss 1, p L4 (2024)
JWST observations of the young Galactic supernova remnant Cassiopeia A revealed an unexpected structure seen as a green emission feature in colored composite MIRI F1130W and F1280W images—hence dubbed the Green Monster—that stretches across the c
Externí odkaz:
https://doaj.org/article/eac4434a428747d5ad92346097288e89
Autor:
Eve J. Lee
Publikováno v:
The Astrophysical Journal Letters, Vol 970, Iss 1, p L15 (2024)
How rapidly a planet grows in mass and how far it may park from the host star depend sensitively on two nondimensional parameters: Stokes number St and turbulent α . Yet these parameters remain highly uncertain, being difficult or impossible to meas
Externí odkaz:
https://doaj.org/article/1c778f74ae0a4c4784800e684866de36
Publikováno v:
The Astrophysical Journal Letters, Vol 970, Iss 1, p L9 (2024)
Type IIb supernovae are an important subclass of stripped-envelope supernovae (SNe), which show H lines only at early times. Their progenitors are believed to contain a low-mass H envelope before explosion. This work reports the discovery of a progen
Externí odkaz:
https://doaj.org/article/cabfcfb969b24c39ba806aca71576b56
Autor:
Laura Flagg, Alycia J. Weinberger, Taylor J. Bell, Luis Welbanks, Giuseppe Morello, Diana Powell, Jacob L. Bean, Jasmina Blecic, Nicolas Crouzet, Peter Gao, Julie Inglis, James Kirk, Mercedes López-Morales, Karan Molaverdikhani, Nikolay Nikolov, Apurva V. Oza, Benjamin V. Rackham, Seth Redfield, Shang-Min Tsai, Ray Jayawardhana, Laura Kreidberg, Matthew C. Nixon, Kevin B. Stevenson, Jake D. Turner
Publikováno v:
The Astrophysical Journal Letters, Vol 969, Iss 1, p L19 (2024)
The signal from a transiting planet can be diluted by astrophysical contamination. In the case of circumstellar debris disks, this contamination could start in the mid-infrared and vary as a function of wavelength, which would then change the observe
Externí odkaz:
https://doaj.org/article/750b90c82c7c4225aafe880362fc36d2
Autor:
Nan Liu, Conel M. O’D. Alexander, Bradley S. Meyer, Larry R. Nittler, Jianhua Wang, Rhonda M. Stroud
Publikováno v:
The Astrophysical Journal Letters, Vol 961, Iss 1, p L22 (2024)
We report C, N, Si, and Al–Mg isotope data for 39 presolar X silicon carbide (SiC) and four silicon nitride grains—a group of presolar grains that condensed in the remnants of core-collapse Type II supernovae (CCSNe)—isolated from the Murchison
Externí odkaz:
https://doaj.org/article/20eb8184d01041f6befc1c4ac96986f1
Autor:
Schuyler D. Van Dyk, Tamás Szalai, Roc M. Cutri, J. Davy Kirkpatrick, Carl J. Grillmair, Sergio B. Fajardo-Acosta, Joseph R. Masiero, Amy K. Mainzer, Christopher R. Gelino, József Vinkó, András Péter Joó, András Pál, Réka Könyves-Tóth, Levente Kriskovics, Róbert Szakáts, Krisztián Vida, WeiKang Zheng, Thomas G. Brink, Alexei V. Filippenko
Publikováno v:
The Astrophysical Journal, Vol 977, Iss 1, p 98 (2024)
During routine survey imaging, the reactivated Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE-R) serendipitously caught the Type II supernova SN 2023ixf in Messier 101 on the rise, starting day 3.6 through day 10.9, and again on the d
Externí odkaz:
https://doaj.org/article/c32af24298e245e9a7148a4afc7d443a
Publikováno v:
The Astrophysical Journal, Vol 977, Iss 1, p 35 (2024)
We predict the existence of α Ori B, a low-mass companion orbiting Betelgeuse. This is motivated by the presence of a 2170 day long secondary period (LSP) in Betelgeuse’s lightcurve, a periodicity that is ≈5 times longer than the star’s 416 da
Externí odkaz:
https://doaj.org/article/e4b4a2ea8b074be99e5b004008503755
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 275, Iss 2, p 33 (2024)
Asymptotic giant branch stars (AGBs) and red supergiant stars (RSGs) exhibit significant mass-loss phenomena and are considered important sources of interstellar dust. In this work, we employed a uniform method of spectral energy distribution fitting
Externí odkaz:
https://doaj.org/article/7aa17a8be1424d78ad0a4efe504c256e
Autor:
Schuyler G. Wolff, András Gáspár, George H. Rieke, Jarron M. Leisenring, Kate Su, David J. Wilner, Luca Matrà, Marie Ygouf, Nicholas P. Ballering
Publikováno v:
The Astronomical Journal, Vol 168, Iss 6, p 236 (2024)
We present a provisory scattered-light detection of the Vega debris disk using deep Hubble Space Telescope (HST) coronagraphy (PID 16666). At only 7.7 pc, Vega is immensely important in debris disk studies both for its prominence and also because it
Externí odkaz:
https://doaj.org/article/3fd7292b942d490196dfeab89f9ee6fd
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 2, p 211 (2024)
There is still considerable debate on the exact composition of grains formed in the outflows of O-rich, asymptotic giant branch stars. Estimates of the expected condensation distances based on radiative transfer calculations show that iron-free silic
Externí odkaz:
https://doaj.org/article/4fea54d23b9f424d8dab12bce6908135