Zobrazeno 1 - 10
of 151
pro vyhledávání: '"ZEIMANN, GREGORY R."'
Autor:
Shafter, Allen W., Zhao, Jingyuan, Hornoch, Kamil, Kučáková, Hana, Taguchi, Kenta, Zhang, Jiashuo, You, Jia, Wang, Binyu, Xu, Runwei, Wang, Weiye, Ren, Yuqing, Ding, Lanhe, Yan, Xiaochang, Zhang, Mi, Wang, Wei-Hao, Bond, Howard E., Williams, Robert, Zeimann, Gregory R.
We report the recent discovery of two new eruptions of the recurrent nova M31N 2017-01e in the Andromeda galaxy. The latest eruption, M31N 2024-08c, reached $R=17.8$ on 2024 August 06.85 UT, $\sim2$ months earlier than predicted. In addition to this
Externí odkaz:
http://arxiv.org/abs/2410.07105
Autor:
Bhattacharjee, Soumyadeep, Kulkarni, S. R., Kong, Albert K. H., Tam, M. S., Bond, Howard E., El-Badry, Kareem, Caiazzo, Ilaria, Graham, Matthew J., Rodriguez, Antonio C., Zeimann, Gregory R., Fremling, Christoffer, Drake, Andrew J., Werner, Klaus, Rodriguez, Hector, Prince, Thomas A., Laher, Russ R., Chen, Tracy X., Riddle, Reed
Over the past several decades, time-series photometry of CSPNe has yielded significant results including, but not limited to, discoveries of nearly 100 binary systems, insights into pulsations and winds in young white dwarfs, and studies of stars und
Externí odkaz:
http://arxiv.org/abs/2410.03589
We present an analysis of 17 H-rich central stars of planetary nebulae (PNe) observed in our spectroscopic survey of nuclei of faint Galactic PNe carried out at the 10-m Hobby-Eberly Telescope. Our sample includes ten O(H) stars, four DAO white dwarf
Externí odkaz:
http://arxiv.org/abs/2408.01411
Autor:
Bond, Howard E., Chaturvedi, Akshat S., Ciardullo, Robin, Werner, Klaus, Zeimann, Gregory R., Siegel, Michael H.
During our spectroscopic survey of central stars of faint planetary nebulae (PNe), we found that the nucleus of Abell 57 exhibits strong nebular emission lines. Using synthetic narrow-band images, we show that the emission arises from an unresolved c
Externí odkaz:
http://arxiv.org/abs/2405.11087
Autor:
Zeimann, Gregory R., Debski, Maya H., Schneider, Donald P., Bowman, William P., Drory, Niv, Hill, Gary J., Lee, Hanshin, MacQueen, Phillip, Shetrone, Matthew
Publikováno v:
2024ApJ...966...14Z
The Hobby-Eberly Telescope (HET) VIRUS Parallel Survey (HETVIPS) is a blind spectroscopic program that sparsely covers approximately two-thirds of the celestial sphere and consists of roughly 252 million fiber spectra. The spectra were taken in paral
Externí odkaz:
http://arxiv.org/abs/2405.00585
Autor:
Bond, Howard E., Zeimann, Gregory R.
We present optical spectroscopy of the 12th-mag central star of the planetary nebula (PN) Patchick 27 (Pa 27), obtained during a survey of faint PN nuclei (PNNi) with the Low-Resolution Spectrograph (LRS2) of the Hobby-Eberly Telescope. The optical s
Externí odkaz:
http://arxiv.org/abs/2404.07152
Publikováno v:
A&A 686, A29 (2024)
We present spectroscopy of three hydrogen-deficient central stars of faint planetary nebulae, with effective temperatures ($T_\mathrm{eff}$) in excess of 100,000 K. The nucleus of RaMul 2 is a Population II Wolf-Rayet star of spectral type [WC], and
Externí odkaz:
http://arxiv.org/abs/2402.18976
Autor:
Weiss, Laurel H., Davis, Dustin, Gebhardt, Karl, Gazagnes, Simon, Khanlari, Mahan Mirza, Cooper, Erin Mentuch, Chisholm, John, Berg, Danielle, Bowman, William P., Byrohl, Chris, Ciardullo, Robin, Fabricius, Maximilian, Farrow, Daniel, Gronwall, Caryl, Hill, Gary J., House, Lindsay R., Jeong, Donghui, Khoraminezhad, Hasti, Kollatschny, Wolfram, Komatsu, Eiichiro, Niemeyer, Maja Lujan, Saito, Shun, Schneider, Donald P., Zeimann, Gregory R.
The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) is designed to detect and measure the redshifts of more than one million Ly$\alpha$ emitting galaxies (LAEs) between $1.88 < z < 3.52$. In addition to its cosmological measurements, these dat
Externí odkaz:
http://arxiv.org/abs/2401.02490
Indirect diagnostics of Lyman continuum (LyC) escape are needed to constrain which sources reionized the universe. We used Mg II to predict the LyC escape fraction (fesc(LyC)) in 14 galaxies selected from the Hobby-Eberly Telescope Dark Energy Experi
Externí odkaz:
http://arxiv.org/abs/2311.18008
Autor:
Liu, Chenxu, Chen, Xinlei, Er, Xinzhong, Zeimann, Gregory R., Vinko, Jozsef, Wheeler, J. Craig, Cooper, Erin Mentuch, Davis, Dustin, Farrow, Daniel J., Gebhardt, Karl, Guo, Helong, Hill, Gary J., House, Lindsay, Kollatschny, Wolfram, Kong, Fanchuan, Kumar, Brajesh, Liu, Xiangkun, Tuttle, Sarah, Endl, Michael, Duke, Parker, Cochran, William D., Zhang, Jinghua, Liu, Xiaowei
Supernova (SN) 2023ixf was discovered on May 19th, 2023. The host galaxy, M101, was observed by the Hobby Eberly Telescope Dark Energy Experiment (HETDEX) collaboration over the period April 30, 2020 -- July 10, 2020, using the Visible Integral-field
Externí odkaz:
http://arxiv.org/abs/2311.10400