Zobrazeno 1 - 10
of 567
pro vyhledávání: '"Bond, Howard"'
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
Autor:
Bond, Howard E., Carter, Calvin, Elmore, David F., Goodhew, Peter, Patchick, Dana, Talbot, Jonathan
We report the serendipitous discovery of a bow-shock nebula around the cataclysmic variable (CV) SY Cancri. In addition, SY Cnc lies near the edge of a faint Halpha-emitting nebula with a diameter of about 15'. The orientation of the bow shock is con
Externí odkaz:
http://arxiv.org/abs/2409.06835
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
If a planetary nebula (PN) is shown to be a member of a star cluster, we obtain important new constraints on the mass and chemical composition of the PN's progenitor star, which cannot be determined for PNe in the field. Cluster membership can be tes
Externí odkaz:
http://arxiv.org/abs/2407.18135
Autor:
Evans, Nancy Remage, Schaefer, Gail, Gallenne, Alexandre, Torres, Guillermo, Horch, Elliot P., Anderson, Richard I, Monnier, John, Roettenbacher, Rachael M., Baron, Fabien, Anugu, Narsireddy, Davidson, Jr., James W., Kervella, Pierre, Bras, Garance, Proffitt, Charles, Mérand, Antoine, Karovska, Margarita, Jones, Jeremy, Lanthermann, Cyprien, Kraus, Stefan, Codron, Isabelle, Bond, Howard E., Viviani, Giordano
The 30 year orbit of the Cepheid Polaris has been followed with observations by the CHARA Array (Center for High Angular Resolution Astronomy) from 2016 through 2021. An additional measurement has been made with speckle interferometry at the Apache P
Externí odkaz:
http://arxiv.org/abs/2407.09641
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:
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:
Bond, Howard E., Schaefer, Gail H., Gilliland, Ronald L., Holberg, Jay B., Mason, Brian D., Lindenblad, Irving W., Seitz-McLeese, Miranda, Arnett, W. David, Demarque, Pierre, Spada, Federico, Young, Patrick A., Barstow, Martin A., Burleigh, Matthew R., Gudehus, Donald
Sirius, the seventh-nearest stellar system, is a visual binary containing the metallic-line A1. V star Sirius. A, the brightest star in the sky, orbited in a 50.13. year period by Sirius B, the brightest and nearest white dwarf (WD). Using images obt
Externí odkaz:
http://hdl.handle.net/10150/624059
http://arizona.openrepository.com/arizona/handle/10150/624059
http://arizona.openrepository.com/arizona/handle/10150/624059