Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/32147
Title: | Spectroscopically Identified Emission Line Galaxy Pairs in the WISP Survey | Authors: | Dai, Y. Sophia Malkan, Matthew M. Teplitz, Harry I. Scarlata, Claudia Alavi, Anahita Atek, Hakim Bagley, Micaela BARONCHELLI, Ivano Battisti, Andrew Bunker, Andrew J. Hathi, Nimish P. Henry, Alaina Huang, Jiasheng Jin, Gaoxiang Li, Zijian Martin, Crystal Mehta, Vihang Phillips, John Rafelski, Marc Rutkowski, Michael Xu, Hai Xu, Cong K. ZANELLA, ANITA |
Issue Date: | 2021 | Journal: | THE ASTROPHYSICAL JOURNAL | Number: | 923 | Issue: | 2 | First Page: | 156 | Abstract: | We identify a sample of spectroscopically measured emission line galaxy (ELG) Pairs up to z = 1.6 from the Wide Field Camera 3 (WFC3) Infrared Spectroscopic Parallels (WISP) survey. WISP obtained slitless, near-infrared grism spectroscopy along with direct imaging in the J and H bands by observing in the pure-parallel mode with the WFC3 on board the Hubble Space Telescope. From our search of 419 WISP fields covering an area of ∼0.5 deg2, we find 413 ELG pair systems, mostly H α emitters. We then derive reliable star formation rates (SFRs) based on the attenuation-corrected H α fluxes. Compared to isolated galaxies, we find an average SFR enhancement of 40%–65%, which is stronger for major Pairs and Pairs with smaller velocity separations (Δ v < 300 km s−1). Based on the stacked spectra from various subsamples, we study the trends of emission line ratios in pairs, and find a general consistency with enhanced lower ionization lines. We study the pair fraction among ELGs, and find a marginally significant increase with redshift f ∝ (1 + z) α , where the power-law index α = 0.58 ± 0.17 from z ∼ 0.2 to ∼1.6. The fraction of active galactic nuclei is found to be the same in the ELG Pairs as compared to the isolated ELGs. | URI: | http://hdl.handle.net/20.500.12386/32147 | URL: | https://api.elsevier.com/content/abstract/scopus_id/85122859188 https://iopscience.iop.org/article/10.3847/1538-4357/ac2f96 |
ISSN: | 0004-637X | DOI: | 10.3847/1538-4357/ac2f96 | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
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Dai_2021_ApJ_923_156.pdf | PDF editoriale | 1.22 MB | Adobe PDF | View/Open |
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