TY - JOUR
T1 - A Two-dimensional Spectroscopic Study of Emission-line Galaxies in the Faint Infrared Grism Survey (FIGS). I. Detection Method and Catalog
AU - Pirzkal, Norbert
AU - Rothberg, Barry
AU - Ryan, Russell E.
AU - Malhotra, Sangeeta
AU - Rhoads, James
AU - Grogin, Norman
AU - Curtis-Lake, Emma
AU - Chevallard, Jacopo
AU - Charlot, Stephane
AU - Finkelstein, Steven L.
AU - Koekemoer, Anton M.
AU - Ghavamian, Parviz
AU - Rodrigues, Myriam
AU - Hammer, Francois
AU - Puech, Mathieu
AU - Larson, Rebecca L.
AU - Christensen, Lise
AU - Cimatti, Andrea
AU - Ferreras, Ignacio
AU - Gardner, Jonathan P.
AU - Gronwall, Caryl
AU - Hathi, Nimish P.
AU - Joshi, Bhavin
AU - Kuntschner, Harald
AU - Meurer, Gerhardt R.
AU - O'Connell, Robert W.
AU - Oestlin, Goeran
AU - Pasquali, Anna
AU - Pharo, John
AU - Straughn, Amber N.
AU - Walsh, Jeremy R.
AU - Watson, Darach
AU - Windhorst, Rogier A.
AU - Zakamska, Nadia L.
N1 - Funding Information:
E.C.L., J.C., and S.C. acknowledge support from the European Research Council (ERC) via an Advanced Grant under grant agreement no. 321323-NEOGAL. The authors would like to thank R.T. Gatto for discussions that provided invaluable assistance in developing the themes presented in this manuscript. A.C. acknowledges the grants ASI n.I/023/12/0 “Attivit relative alla fase B2/C per la missione Euclid” and PRIN MIUR 2015 “Cosmology and Fundamental Physics: illuminating the Dark Universe with Euclid.”
Funding Information:
Support for program #13779 was provided by NASA through a grant from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555.
Publisher Copyright:
© 2018. The American Astronomical Society. All rights reserved..
PY - 2018/11/20
Y1 - 2018/11/20
N2 - We present the results from the application of a two-dimensional emission line detection method, EMission-line two-Dimensional (EM2D), to the near-infrared G102 grism observations obtained with the Wide-Field Camera 3 (WFC3) as part of the Cycle 22 Hubble Space Telescope Treasury Program: the Faint Infrared Grism Survey (FIGS). Using the EM2D method, we have assembled a catalog of emission line galaxies (ELGs) with resolved star formation from each of the four FIGS fields. Not only can one better assess the global properties of ELGs, but the EM2D method allows for the analysis and improved study of the individual emission-line region within each galaxy. This paper includes a description of the methodology, advantages, and the first results of the EM2D method applied to ELGs in FIGS. The advantage of 2D emission line measurements includes significant improvement of galaxy redshift measurements, approaching the level of accuracy seen in high-spectral-resolution data, but with greater efficiency; and the ability to identify and measure the properties of multiple sites of star formation and over scales of ∼1 kpc within individual galaxies out to z ∼ 4. The EM2D method also significantly improves the reliability of high-redshift (z ∼ 7) Lyα detections. Coupled with the wide field of view and high efficiency of space-based grism observations, EM2D provides a noteworthy improvement on the physical parameters that can be extracted from grism observations.
AB - We present the results from the application of a two-dimensional emission line detection method, EMission-line two-Dimensional (EM2D), to the near-infrared G102 grism observations obtained with the Wide-Field Camera 3 (WFC3) as part of the Cycle 22 Hubble Space Telescope Treasury Program: the Faint Infrared Grism Survey (FIGS). Using the EM2D method, we have assembled a catalog of emission line galaxies (ELGs) with resolved star formation from each of the four FIGS fields. Not only can one better assess the global properties of ELGs, but the EM2D method allows for the analysis and improved study of the individual emission-line region within each galaxy. This paper includes a description of the methodology, advantages, and the first results of the EM2D method applied to ELGs in FIGS. The advantage of 2D emission line measurements includes significant improvement of galaxy redshift measurements, approaching the level of accuracy seen in high-spectral-resolution data, but with greater efficiency; and the ability to identify and measure the properties of multiple sites of star formation and over scales of ∼1 kpc within individual galaxies out to z ∼ 4. The EM2D method also significantly improves the reliability of high-redshift (z ∼ 7) Lyα detections. Coupled with the wide field of view and high efficiency of space-based grism observations, EM2D provides a noteworthy improvement on the physical parameters that can be extracted from grism observations.
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U2 - 10.3847/1538-4357/aae585
DO - 10.3847/1538-4357/aae585
M3 - Article
AN - SCOPUS:85057285806
SN - 0004-637X
VL - 868
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 1
M1 - 61
ER -