Zobrazeno 1 - 10
of 490
pro vyhledávání: '"Bershady , Matthew"'
Light scrambling and focal ratio degradation of thin multimode fibers with different core geometries
Autor:
Lee, Man-Yin Leo, Lin, Zhiheng, Hui, Chit-Ho, Yan, Renbin, Cheung, YiuHung, Hung, Horace Tsz-Hong, Bershady, Matthew A., Chattopadhyay, Sabysachi, Smith, Michael P.
The performance of fiber-fed astronomical spectrographs is highly influenced by the properties of fibers. The near-field and far-field scrambling characteristics have a profound impact on the line spread function (LSF) of the spectra. Focal ratio deg
Externí odkaz:
http://arxiv.org/abs/2408.07961
Autor:
Zanger, Brian DiGiorgio, Westfall, Kyle B., Bundy, Kevin, Drory, Niv, Bershady, Matthew A., Campbell, Stephanie, Weijmans, Anne-Marie, Masters, Karen L., Stark, David, Law, David
The SDSS-IV/MaNGA Survey data provide an unprecedented opportunity to study the internal motions of galaxies and, in particular, represent the largest sample of barred galaxy kinematic maps obtained to date. We present results from Nirvana, our non-a
Externí odkaz:
http://arxiv.org/abs/2407.11908
Three fibre feed integral field units (IFUs), called Slit Mask IFUs (SMI), are being developed in the SAAO fibre-lab for the Robert Stobie Spectrograph (RSS). The smaller, 200 micron fibre IFU (SMI-200) has 309 x 0.9 arcsec diameter spatial elements
Externí odkaz:
http://arxiv.org/abs/2407.01346
Publikováno v:
Proceedings Volume 13096, Ground-based and Airborne Instrumentation for Astronomy X; 130969U (2024)
Most optical spectropolarimeters built to date operate as long-slit or point-source instruments; they are inefficient for observations of extended objects such as galaxies and nebulae. 2D spectropolarimetry technique development is a major challenge
Externí odkaz:
http://arxiv.org/abs/2406.19124
Autor:
Bershady, Matthew A., Westfall, Kyle B., Shetty, Shravan, Law, David R., Cappellari, Michele, Drory, Niv, Bundy, Kevin, Yan, Renbin
We measure the age-velocity relationship from the lag between ionized gas and stellar tangential speeds in ~500 nearby disk galaxies from MaNGA in SDSS-IV. Selected galaxies are kinematically axisymmetric. Velocity lags are asymmetric drift, seen in
Externí odkaz:
http://arxiv.org/abs/2405.02460
Autor:
Chattopadhyay, Sabyasachi, Bershady, Matthew A., Law, David R., Westfall, Kyle, Shetty, Shravan, Machuca, Camilo, Cappellari, Michele, Rubin, Kate H. R., Bundy, Kevin, Penny, Samantha
We have re-observed $\rm\sim$40 low-inclination, star-forming galaxies from the MaNGA survey ($\upsigma\sim65$~\kms) at $\sim$6.5 times higher spectral resolution ($\upsigma\sim10$~\kms) using the HexPak integral field unit on the WIYN 3.5m telescope
Externí odkaz:
http://arxiv.org/abs/2402.01284
Autor:
Klimenko, Viacheslav V., Kulkarni, Varsha, Wake, David A., Poudel, Suraj, Bershady, Matthew A., Peroux, Celine, Lundgren, Britt
We analyze the cool gas in and around 14 nearby galaxies (at $z$$<$0.1) mapped with the SDSS-IV MaNGA survey by measuring absorption lines produced by gas in spectra of background quasars/AGN at impact parameters of 0-25 effective radii from the gala
Externí odkaz:
http://arxiv.org/abs/2308.10992
Autor:
Shen, Yue, Grier, Catherine J., Horne, Keith, Stone, Zachary, Li, Jennifer I., Yang, Qian, Homayouni, Yasaman, Trump, Jonathan R., Anderson, Scott F., Brandt, W. N., Hall, Patrick B., Ho, Luis C., Jiang, Linhua, Petitjean, Patrick, Schneider, Donald P., Tao, Charling, Donnan, Fergus. R., AlSayyad, Yusra, Bershady, Matthew A., Blanton, Michael R., Bizyaev, Dmitry, Bundy, Kevin, Chen, Yuguang, Davis, Megan C., Dawson, Kyle, Fan, Xiaohui, Greene, Jenny E., Groller, Hannes, Guo, Yucheng, Ibarra-Medel, Hector, Jiang, Yuanzhe, Keenan, Ryan P., Kollmeier, Juna A., Lejoly, Cassandra, Li, Zefeng, de la Macorra, Axel, Moe, Maxwell, Nie, Jundan, Rossi, Graziano, Smith, Paul S., Tee, Wei Leong, Weijmans, Anne-Marie, Xu, Jiachuan, Yue, Minghao, Zhou, Xu, Zhou, Zhimin, Zou, Hu
We present the final data from the Sloan Digital Sky Survey Reverberation Mapping (SDSS-RM) project, a precursor to the SDSS-V Black Hole Mapper Reverberation Mapping program. This data set includes 11-year photometric and 7-year spectroscopic light
Externí odkaz:
http://arxiv.org/abs/2305.01014
Autor:
Ji, Xihan, Yan, Renbin, Bundy, Kevin, Boquien, Médéric, Schaefer, Adam, Belfiore, Francesco, Bershady, Matthew A., Drory, Niv, Li, Cheng, Westfall, Kyle B., Lin, Zesen, Bizyaev, Dmitry, Law, David R., Riffel, Rogério, Riffel, Rogemar A.
Publikováno v:
A&A 670, A125 (2023)
A fundamental assumption adopted in nearly every extragalactic emission-line study is that the attenuation of different emission lines can be described by a single attenuation curve. Here we show this assumption fails in many cases with important imp
Externí odkaz:
http://arxiv.org/abs/2209.13618
Publikováno v:
2022
Two fibre integral field units (IFU) are being built in the SAAO fibre-lab for the Robert Stobie Spectrograph's visible arm and the future red arm. Each IFU sits in its own slit-mask cassette and is referred to as a slit-mask IFU (SMI). They will be
Externí odkaz:
http://arxiv.org/abs/2208.00866