Spectroscopically Identified Emission Line Galaxy Pairs in the WISP survey
We identify a sample of spectroscopically measured emission line galaxy (ELG) pairs up to z=1.6 from the 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...
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| creator | Dai, Y Sophia Malkan, Matthew M Teplitz, Harry I Scarlata, Claudia Alavi, Anahita Hakim Atek 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 |
| description | We identify a sample of spectroscopically measured emission line galaxy (ELG) pairs up to z=1.6 from the 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 Wide Field Camera Three (WFC3) on the Hubble Space Telescope (HST). From our search of 419 WISP fields covering an area of ~0.5 deg\(^{2}\), we find 413 ELG pair systems, mostly Halpha emitters. We then derive reliable star formation rates (SFRs) based on the attenuation-corrected Halpha 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 < 300 km/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\(\pm\)0.17 from \(z\sim\)0.2 to \(z\sim\)1.6. The fraction of Active galactic Nuclei (AGNs), is found to be the same in the ELG pairs as compared to isolated ELGs. |
| doi_str_mv | 10.48550/arxiv.2110.07316 |
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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 Wide Field Camera Three (WFC3) on the Hubble Space Telescope (HST). From our search of 419 WISP fields covering an area of ~0.5 deg\(^{2}\), we find 413 ELG pair systems, mostly Halpha emitters. We then derive reliable star formation rates (SFRs) based on the attenuation-corrected Halpha 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 < 300 km/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\(\pm\)0.17 from \(z\sim\)0.2 to \(z\sim\)1.6. The fraction of Active galactic Nuclei (AGNs), is found to be the same in the ELG pairs as compared to isolated ELGs.</description><identifier>EISSN: 2331-8422</identifier><identifier>DOI: 10.48550/arxiv.2110.07316</identifier><language>eng</language><publisher>Ithaca: Cornell University Library, arXiv.org</publisher><subject>Active galactic nuclei ; Attenuation ; Emission analysis ; Emission spectroscopy ; Emitters ; Field cameras ; Galaxies ; Hubble Space Telescope ; Infrared spectroscopy ; Near infrared radiation ; Physics - Astrophysics of Galaxies ; Physics - Cosmology and Nongalactic Astrophysics ; Red shift ; Space telescopes ; Spectrum analysis ; Star & galaxy formation ; Star formation</subject><ispartof>arXiv.org, 2021-10</ispartof><rights>2021. This work is published under http://creativecommons.org/licenses/by-nc-nd/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><rights>http://creativecommons.org/licenses/by-nc-nd/4.0</rights><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>228,230,777,781,882,27906</link.rule.ids><backlink>$$Uhttps://doi.org/10.48550/arXiv.2110.07316$$DView paper in arXiv$$Hfree_for_read</backlink><backlink>$$Uhttps://doi.org/10.3847/1538-4357/ac2f96$$DView published paper (Access to full text may be restricted)$$Hfree_for_read</backlink></links><search><creatorcontrib>Dai, Y Sophia</creatorcontrib><creatorcontrib>Malkan, Matthew M</creatorcontrib><creatorcontrib>Teplitz, Harry I</creatorcontrib><creatorcontrib>Scarlata, Claudia</creatorcontrib><creatorcontrib>Alavi, Anahita</creatorcontrib><creatorcontrib>Hakim Atek</creatorcontrib><creatorcontrib>Bagley, Micaela</creatorcontrib><creatorcontrib>Baronchelli, Ivano</creatorcontrib><creatorcontrib>Battisti, Andrew</creatorcontrib><creatorcontrib>Bunker, Andrew J</creatorcontrib><creatorcontrib>Hathi, Nimish P</creatorcontrib><creatorcontrib>Henry, Alaina</creatorcontrib><creatorcontrib>Huang, Jiasheng</creatorcontrib><creatorcontrib>Jin, Gaoxiang</creatorcontrib><creatorcontrib>Li, Zijian</creatorcontrib><creatorcontrib>Martin, Crystal</creatorcontrib><creatorcontrib>Mehta, Vihang</creatorcontrib><creatorcontrib>Phillips, John</creatorcontrib><creatorcontrib>Rafelski, Marc</creatorcontrib><creatorcontrib>Rutkowski, Michael</creatorcontrib><creatorcontrib>Xu, Hai</creatorcontrib><creatorcontrib>Xu, Cong K</creatorcontrib><creatorcontrib>Zanella, Anita</creatorcontrib><title>Spectroscopically Identified Emission Line Galaxy Pairs in the WISP survey</title><title>arXiv.org</title><description>We identify a sample of spectroscopically measured emission line galaxy (ELG) pairs up to z=1.6 from the WFC3 Infrared Spectroscopic Parallels (WISP) survey. 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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\(\pm\)0.17 from \(z\sim\)0.2 to \(z\sim\)1.6. The fraction of Active galactic Nuclei (AGNs), is found to be the same in the ELG pairs as compared to isolated ELGs.</description><subject>Active galactic nuclei</subject><subject>Attenuation</subject><subject>Emission analysis</subject><subject>Emission spectroscopy</subject><subject>Emitters</subject><subject>Field cameras</subject><subject>Galaxies</subject><subject>Hubble Space Telescope</subject><subject>Infrared spectroscopy</subject><subject>Near infrared radiation</subject><subject>Physics - Astrophysics of Galaxies</subject><subject>Physics - Cosmology and Nongalactic Astrophysics</subject><subject>Red shift</subject><subject>Space telescopes</subject><subject>Spectrum analysis</subject><subject>Star & galaxy formation</subject><subject>Star formation</subject><issn>2331-8422</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GOX</sourceid><recordid>eNotj11LwzAUhoMgOOZ-gFcGvO5MTj6aXsqYs1JwsIGXJW1SzOjamrRj_fd2mzfv4T08HM6D0BMlS66EIK_an91pCXRakJhReYdmwBiNFAd4QIsQDoQQkDEIwWboc9fZsvdtKNvOlbquR5wa2_Suctbg9dGF4NoGZ66xeKNrfR7xVjsfsGtw_2Pxd7rb4jD4kx0f0X2l62AX_3OO9u_r_eojyr426eoti7QAiKROSGGKKSiXQkuRlAk1LCElNzKpQNOS65hV3BgQXJkkZlMrOLGCEMoMm6Pn29mraN55d9R-zC_C-VV4Il5uROfb38GGPj-0g2-mn3IQCkBRJYH9AZyKV5w</recordid><startdate>20211014</startdate><enddate>20211014</enddate><creator>Dai, Y Sophia</creator><creator>Malkan, Matthew M</creator><creator>Teplitz, Harry I</creator><creator>Scarlata, Claudia</creator><creator>Alavi, Anahita</creator><creator>Hakim Atek</creator><creator>Bagley, Micaela</creator><creator>Baronchelli, Ivano</creator><creator>Battisti, Andrew</creator><creator>Bunker, Andrew J</creator><creator>Hathi, Nimish P</creator><creator>Henry, Alaina</creator><creator>Huang, Jiasheng</creator><creator>Jin, Gaoxiang</creator><creator>Li, Zijian</creator><creator>Martin, Crystal</creator><creator>Mehta, Vihang</creator><creator>Phillips, John</creator><creator>Rafelski, Marc</creator><creator>Rutkowski, Michael</creator><creator>Xu, Hai</creator><creator>Xu, Cong K</creator><creator>Zanella, Anita</creator><general>Cornell University Library, arXiv.org</general><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>L6V</scope><scope>M7S</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>GOX</scope></search><sort><creationdate>20211014</creationdate><title>Spectroscopically Identified Emission Line Galaxy Pairs in the WISP survey</title><author>Dai, Y Sophia ; 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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 Wide Field Camera Three (WFC3) on the Hubble Space Telescope (HST). From our search of 419 WISP fields covering an area of ~0.5 deg\(^{2}\), we find 413 ELG pair systems, mostly Halpha emitters. We then derive reliable star formation rates (SFRs) based on the attenuation-corrected Halpha 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 < 300 km/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\(\pm\)0.17 from \(z\sim\)0.2 to \(z\sim\)1.6. The fraction of Active galactic Nuclei (AGNs), is found to be the same in the ELG pairs as compared to isolated ELGs.</abstract><cop>Ithaca</cop><pub>Cornell University Library, arXiv.org</pub><doi>10.48550/arxiv.2110.07316</doi><oa>free_for_read</oa></addata></record> |
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| subjects | Active galactic nuclei Attenuation Emission analysis Emission spectroscopy Emitters Field cameras Galaxies Hubble Space Telescope Infrared spectroscopy Near infrared radiation Physics - Astrophysics of Galaxies Physics - Cosmology and Nongalactic Astrophysics Red shift Space telescopes Spectrum analysis Star & galaxy formation Star formation |
| title | Spectroscopically Identified Emission Line Galaxy Pairs in the WISP survey |
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