Innovations and advances in instrumentation at the W. M. Keck Observatory, vol. II

Autor: Marc . Kassis, Steve Allen, Carlos Alvarez, Ravinder Banyal, Robert Bertz, Charles Beichman, Aaron Brown, Matthew Brown, Gerald Cabak, Kevin Bundy, Sylvain Cetre, Jason Chin, Mark Chun, Will Deich, Richard Dekany, Jacques-Robert Delorme, Mark Devenot, Greg Doppmann, Michael P. Fitzgerald, Jason R. Fucik, Grant Hill, Philip . Hinz, Bradford P. Holden, Andrew W. Howard, Maodong Gao, Steve Gibson, Percy Gomez, Colby Gottschalk, Peter R. Gillingham, Tucker Jones, Nemanja Jovanovic, Evan Kirby, Quinn Konopacky, Shanti Krishnan, Renate Kupke, James E. Larkin, Stephanie D. Leifer, Hilton A. Lewis, Scott Lilley, Jessica Lu, James E. Lyke, Nicholas MacDonald, Eduardo Marin, Matt Matuszewski, Dimitri Mawet, Rosalie McGurk, Maxwell A. Millar-Blanchaer, Reston . Nash, Craig Nance, James D. Neill, John M. O'Meara, Eliad Peretz, Claire . Poppett, John C. Mather, Matthew V. Radovan, Mitsuko K. Roberts, Sam Ragland, Kodi Rider, Constance . Rockosi, Dale Sandfor, Boqiang Shen, Charles C. Steidel, Sunil Simha, Andy Skemer, Richard Stelter, Avinash Surendran, James Thorne, Ben McCarney, Kyle Lanclos, Ashley Baker, Ryan Rubenzahl, Arpita Roy, Sam Halverson, Jerry Edelstein, Christopher Martin, Maureen Savage, Dale Sandford, Stephanie Sallum, Josh Walawender, Peter Wizinowich, Kyle B. Westfall, Kerry J. Vahala, Shelley A. Wright, Truman Wold, Sherry Yeh

Publikováno v: Ground-based and Airborne Instrumentation for Astronomy IX.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::65328af3f1273f3342b2c41178afe082
https://doi.org/10.1117/12.2628630

Spatially Resolved Stellar Spectroscopy of the Ultra-diffuse Galaxy Dragonfly 44. III. Evidence for an Unexpected Star Formation History under Conventional Galaxy Evolution Processes

Autor: Alexa Villaume, Aaron J. Romanowsky, Jean Brodie, Pieter van Dokkum, Charlie Conroy, Duncan A. Forbes, Shany Danieli, Christopher Martin, Matt Matuszewski

We use the Keck Cosmic Web Imager integral field unit spectrograph to (1) measure the global stellar population parameters for the ultra-diffuse galaxy (UDG) Dragonfly 44 (DF44) to much higher precision than previously possible for any UDG and (2) fo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c439dc9dfdaa902377a34735917ccf5f
https://resolver.caltech.edu/CaltechAUTHORS:20220114-265463000

Spatially Resolved Stellar Kinematics of the Ultra-diffuse Galaxy Dragonfly 44. II. Constraints on Fuzzy Dark Matter

Autor: Alexa Villaume, John Tamanas, Pieter van Dokkum, Shany Danieli, Jean P. Brodie, Asher Wasserman, Aaron J. Romanowsky, Roberto Abraham, Christopher Martin, Stefano Profumo, Duncan A. Forbes, Matt Matuszewski

Publikováno v: Astrophysical Journal, vol 885, iss 2
Wasserman, Asher; Dokkum, Pieter van; Romanowsky, Aaron J; Brodie, Jean; Danieli, Shany; Forbes, Duncan A; et al.(2019). Spatially Resolved Stellar Kinematics of the Ultra-Diffuse Galaxy Dragonfly 44: II. Constraints on Fuzzy Dark Matter. UC Santa Cruz: Retrieved from: http://www.escholarship.org/uc/item/5982p41g
The Astrophysical Journal, vol 885, iss 2

Given the absence of directly detected dark matter (DM) as weakly interacting massive particles, there is strong interest in the possibility that DM is an ultra-light scalar field, here denoted as fuzzy DM. Ultra-diffuse galaxies, with the sizes of g

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1560badabd15b2ba5aefc1e431526c14
https://escholarship.org/uc/item/5982p41g

iPTF 16hgs: A Double-peaked Ca-rich Gap Transient in a Metal-poor, Star-forming Dwarf Galaxy

Autor: Ofer Yaron, S. Bradley Cenko, Ragnhild Lunnan, D. Sullivan, Mansi M. Kasliwal, Yi Cao, Kaushik De, Eran O. Ofek, Yvette C. Perrott, Joel Johansson, Matt Matuszewski, Albert K. H. Kong, Umaa Rebbapragada, Shrinivas R. Kulkarni, Adam Rubin, T. M. Cantwell, Kunal Mooley, Peter Nugent, Avishay Gal-Yam, Frank J. Masci, James D. Neill

Publikováno v: De, K; Kasliwal, MM; Cantwell, T; Cao, Y; Cenko, SB; Gal-Yam, A; et al.(2018). IPTF 16hgs: A Double-peaked Ca-rich Gap Transient in a Metal-poor, Star-forming Dwarf Galaxy. Astrophysical Journal, 866(1). doi: 10.3847/1538-4357/aadf8e. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/7402j53d
De, K, Kasliwal, M M, Cantwell, T, Cao, Y, Cenko, S B, Gal-yam, A, Johansson, J, Kong, A, Kulkarni, S R, Lunnan, R, Masci, F, Matuszewski, M, Mooley, K P, Neill, J D, Nugent, P E, Ofek, E O, Perrott, Y, Rebbapragada, U D, Rubin, A, Sullivan, D O & Yaron, O 2018, ' iPTF 16hgs: A Double-peaked Ca-rich Gap Transient in a Metal-poor, Star-forming Dwarf Galaxy ', The Astrophysical Journal, vol. 866, no. 1, pp. 72 . https://doi.org/10.3847/1538-4357/aadf8e
Astrophysical Journal, vol 866, iss 1
The Astrophysical Journal, vol 866, iss 1

Calcium rich gap transients represent an intriguing new class of faint and fast evolving supernovae that exhibit strong [Ca II] emission in their nebular phase spectra. In this paper, we present the discovery and follow-up observations of iPTF 16hgs

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4bbf9b887f5bdd80afa1b1d871fdec31
https://doi.org/10.3847/1538-4357/aadf8e

Intergalactic Medium Emission Observations with the Cosmic Web Imager. I. The Circum-QSO Medium of QSO 1549+19, and Evidence for a Filamentary Gas Inflow

Autor: S. Rahman, Daphne Chang, Charles C. Steidel, Matt Matuszewski, D. Christopher Martin, Anna M. Moore, Patrick Morrissey

The Palomar Cosmic Web Imager (PCWI), an integral field spectrograph designed to detect and map low surface brightness emission, has obtained imaging spectroscopic maps of Ly-alpha from the circum-QSO medium (CQM) of QSO HS1549+19 at redshift of 2.84

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6a15e1294d96538710a1950ffe5ecb11
https://resolver.caltech.edu/CaltechAUTHORS:20140303-152428640