Emission Line Galaxy Pairs from the WISP survey

DOI

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 ~0.5deg^2^, we find 413 ELG pair systems, mostly H{alpha} emitters. We then derive reliable star formation rates (SFRs) based on the attenuation-corrected H{alpha} 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 ({Delta}v<300km/s). 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{propto}(1+z)^{alpha}^, where the power-law index {alpha}=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.

Cone search capability for table J/ApJ/923/156/elgp (Emission line galaxy pair (Table 1) and galaxy properties (Table 2))

Identifier
DOI http://doi.org/10.26093/cds/vizier.19230156
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/ApJ/923/156
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/923/156
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/923/156
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/ApJ/923/156
Provenance
Creator Dai Y.S.; Malkan M.M.; Teplitz H.I.; Scarlata C.; Alavi A.; Atek H.,Bagley M.; Baronchelli I.; Battisti A.; Bunker A.J.; Hathi N.P.; Henry A.,Huang J.; Jin G.; Li Z.; Martin C.; Mehta V.; Phillips J.; Rafelski M.,Rutkowski M.; Xu H.; Xu C.K.; Zanella A.
Publisher CDS
Publication Year 2023
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Cosmology; Galactic and extragalactic Astronomy; Interdisciplinary Astronomy; Natural Sciences; Observational Astronomy; Physics