Zobrazeno 1 - 10
of 154
pro vyhledávání: '"Evans, Nancy Remage"'
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:
Evans, Nancy Remage, Gallenne, Alexandre, Kervella, Pierre, Mérand, Antoine, Monnier, John, Anderson, Richard I, Günther, H. Moritz, Proffitt, Charles, Winston, Elaine M., Pietrzynski, Grzegorz, Gieren, Wolfgang, Kuraszkiewicz, Joanna, Anugu, Narsireddy, Roettenbacher, Rachael M., Lanthermann, Cyprien, Gutierrez, Mayra, Schaefer, Gail, Setterholm, Benjamin R., Ibrahim, Noura, Kraus, Stefan
The Cepheid AW Per is a component in a multiple system with a long period orbit. The radial velocities of Griffin (2016) cover the 38 year orbit well. An extensive program of interferometry with the CHARA array is reported here, from which the long p
Externí odkaz:
http://arxiv.org/abs/2406.17881
Autor:
Evans, Nancy Remage, Ferrari, Mckenzie G., Kuraszkiewicz, Joanna, Silverberg, Steven, Nichols, Joy, Torres, Guillermo, Fischbach, Makenzi
Ultraviolet spectra were taken of 25 Detached Eclipsing Binaries (DEBs) with spectral types O, B, and early A with the International Ultraviolet Explorer (IUE) satellite in the 1150 to 1900 ${\AA}$ region. The spectra were compared with BOSZ model at
Externí odkaz:
http://arxiv.org/abs/2308.01374
Autor:
Evans, Nancy Remage, Engle, Scott, Pillitteri, Ignazio, Guinan, Edward, Günther, H. Moritz, Wolk, Scott, Neilson, Hilding, Marengo, Massimo, Matthews, Lynn D., Moschou, Sofia, Drake, Jeremy J., Winston, Elaine M., Moe, Maxwell, Kervella, Pierre, Breuval, Louise
X-ray observations have been made of a sample of 20 classical Cepheids, including two new observations (Polaris and {\it l} Car) reported here. The occurrence of X-ray flux around the pulsation cycle is discussed. Three Cepheids are detected ($\delta
Externí odkaz:
http://arxiv.org/abs/2205.07967
Autor:
Evans, Nancy Remage, Pillitteri, Ignazio, Kervella, Pierre, Engle, Scott, Guinan, Edward, Günther, H. Moritz, Wolk, Scott, Neilson, Hilding, Marengo, Massimo, Matthews, Lynn D., Moschou, Sofia, Drake, Jeremy J., Guzik, Joyce A., Gallenne, Alexandre, Mérand, Antoine, Hocdé, Vincent
X-ray bursts have recently been discovered in the Cepheids $\delta$ Cep and $\beta$ Dor modulated by the pulsation cycle. We have obtained an observation of the Cepheid $\eta$ Aql with the XMM-Newton satellite at the phase of maximum radius, the phas
Externí odkaz:
http://arxiv.org/abs/2105.13382
Autor:
Evans, Nancy Remage, Guenther, H. Moritz, Bond, Howard E., Schaefer, Gail H., Mason, Brian D., Karovska, Margarita, Tingle, Evan, Wolk, Scott, Engle, Scott, Guinan, Edward, Pillitteri, Ignazio, Proffitt, Charles, Kervella, Pierre, Gallenne, Alexandre, Anderson, Richard I., Moe, Maxwell
Cepheids in multiple systems provide information on the outcome of the formation of massive stars. They can also lead to exotic end-stage objects. This study concludes our survey of 70 galactic Cepheids using the {\it Hubble Space Telescope\} (\HST)
Externí odkaz:
http://arxiv.org/abs/2010.07996
Autor:
Moschou, Sofia-Paraskevi, Vlahakis, Nektarios, Drake, Jeremy J., Evans, Nancy Remage, Neilson, Hilding R., Guzik, Joyce Ann, ZuHone, John
Cepheids are pulsating variable stars with a periodic chromospheric response at UV wavelengths close to their minimum radius phase. Recently, an X-ray variable signature was captured in observations during the \emph{maximum} radius phase. This X-ray
Externí odkaz:
http://arxiv.org/abs/2007.11545
Autor:
Evans, Nancy Remage, Pillitteri, Ignazio, Molnar, Laszlo, Szabados, Laszlo, Plachy, Emese, Szabo, Robert, Engle, Scott, Guinan, Ed, Wolk, Scott, Guenther, H. Moritz, Neilson, Hilding, Marengo, Massimo, Matthews, Lynn D., Moschou, Sofia, Drake, Jeremy J., Kashyap, Vinay, Kervella, Pierre, Tordai, Tamas, Somogyi, Peter, Burki, Gilbert
V473 Lyr is a classical Cepheid which is unique in having substantial amplitude variations with a period of approximately 3.3 years, thought to be similar to the Blazhko variations in RR Lyrae stars. We obtained an {\it XMM-Newton} observation of thi
Externí odkaz:
http://arxiv.org/abs/2001.02253
Autor:
Evans, Nancy Remage, Proffitt, Charles, Carpenter, Kenneth G., Winston, Elaine M., Kober, Gladys V., Günther, H. Moritz, Gorynya, Natalia, Rastorguev, Alexey, Inno, L.
V350 Sgr is a classical Cepheid suitable for mass determination. It has a hot companion which is prominent in the ultraviolet and which is not itself a binary. We have obtained two high resolution echelle spectra of the companion at orbital velocity
Externí odkaz:
http://arxiv.org/abs/1808.10472
Autor:
Evans, Nancy Remage, Karovska, Margarita, Bond, Howard E., Schaefer, Gail H., Sahu, Kailash C., Mack, Jennifer, Nelan, Edmund P., Gallenne, Alexandre, Tingle, Evan D.
As part of a program to determine dynamical masses of Cepheids, we have imaged the nearest and brightest Cepheid, Polaris, with the Hubble Space Telescope Wide Field Planetary Camera 2 and Wide Field Camera 3. Observations were obtained at three epoc
Externí odkaz:
http://arxiv.org/abs/1807.06115