Výsledky vyhledávání - "Allen W. Shafter"

Akademický článek

Exploring the Maximum Magnitude versus Rate of Decline Relation for Novae in M31

Autor: J. Grace Clark, Kamil Hornoch, Allen W. Shafter, Hana Kučáková, Jan Vraštil, Peter Kušnirák, Marek Wolf

Publikováno v: The Astrophysical Journal Supplement Series, Vol 272, Iss 2, p 28 (2024)

The results of a two-decade-long R -band photometric survey of novae in M31 are presented. From these data, R -band light curves have been determined for 180 novae with data sufficient for estimating the peak brightness and subsequent rate of decline

Externí odkaz: https://doaj.org/article/9ce8469affd84436b180f66132af15b7

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Akademický článek

IRAS 00450+7401 and the Mid-infrared Fade/Burst Cycle of R Coronae Borealis-type Stars

Autor: William A. Burris, Carl Melis, Allen W. Shafter, Georgia V. Panopoulou, E. L. Wright, John Della Costa

Publikováno v: The Astronomical Journal, Vol 166, Iss 2, p 40 (2023)

We present optical and infrared imaging and spectroscopy of the R Coronae Borealis-type (R Cor Bor) star IRAS 00450+7401. Optical spectra further confirm its classification as a cool R Cor Bor system, having a hydrogen-deficient carbon star spectral

Externí odkaz: https://doaj.org/article/f86c9e3551bd4728b6c408564ccb9d22

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Recent Extragalactic Nova Rate Determinations and their Implications

Autor: Massimo Della Valle, Allen W. Shafter, Sumner Starrfield

Publikováno v: Research Notes of the AAS. 7:62

Comparing the rates of novae in galaxies of differing Hubble types reveals the sensitivity of nova eruptions to the properties (age, star formation history, metallicity) of the underlying stellar population. Recent studies using the Hubble Space Tele

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e4f2b04e2199573f109a2b953849fb26
https://doi.org/10.3847/2515-5172/acc937

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M31N 1926-07c: A Recurrent Nova in M31 with a 2.8 Year Recurrence Time

Autor: Allen W. Shafter, Kamil Hornoch, Hana Kučáková, Jingyuan Zhao, Mi Zhang, Xing Gao, John Della Costa, William A. Burris, J. Grace Clark, Marek Wolf, Petr Zasche

The M31 recurrent nova M31N 1926-07c has had five recorded eruptions. Well-sampled light curves of the two most recent outbursts, in January of 2020 (M31N 2020-01b) and September 2022 (M31N 2022-09a), are presented showing that the photometric evolut

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aa5c7a78963648bebb0bbf25c05d4350

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The Rate and Spatial Distribution of Novae in M31 as Determined by a 20 Year Survey

Autor: Travis A. Rector, Allen W. Shafter, William A. Burris, Matthew J. Walentosky, Kendall D. Viafore, Allison L. Strom, Richard J. Cool, Nicole A. Sola, Hannah Crayton, Catherine A. Pilachowski, George H. Jacoby, Danielle L. Corbett, Michelle Rene, Denise Hernandez

Publikováno v: The Astrophysical Journal. 936:117

A long-term (1995–2016) survey for novae in the nearby Andromeda galaxy (M31) was conducted as part of the Research-Based Science Education initiative. During the course of the survey 180 nights of observation were completed at Kitt Peak, Arizona.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0c4ed3b1cc059bae6388413686b2a1cf
https://doi.org/10.3847/1538-4357/ac87ad

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