%AMarques-Chaves, R. [Centro de Astrobiología (CSIC-INTA), Carretera de Ajalvir, E-28850 Torrejón de Ardoz, Madrid, Spain, Instituto de Astrofísica de Canarias, C/Vía Láctea, s/n, E-38205 San Cristóbal de La Laguna, Tenerife, Spain, Dpto. Astrofísica, Universidad de La Laguna, E-38206 San Cristóbal de La Laguna, Tenerife, Spain]%AMarques-Chaves, R. [Centro de Astrobiología (CSIC-INTA), Carretera de Ajalvir, E-28850 Torrejón de Ardoz, Madrid, Spain, Instituto de Astrofísica de Canarias, C/Vía Láctea, s/n, E-38205 San Cristóbal de La Laguna, Tenerife, Spain, Dpto. Astrofísica, Universidad de La Laguna, E-38206 San Cristóbal de La Laguna, Tenerife, Spain]%APérez-Fournon, I. [Instituto de Astrofísica de Canarias, C/Vía Láctea, s/n, E-38205 San Cristóbal de La Laguna, Tenerife, Spain, Dpto. Astrofísica, Universidad de La Laguna, E-38206 San Cristóbal de La Laguna, Tenerife, Spain]%APérez-Fournon, I. [Instituto de Astrofísica de Canarias, C/Vía Láctea, s/n, E-38205 San Cristóbal de La Laguna, Tenerife, Spain, Dpto. Astrofísica, Universidad de La Laguna, E-38206 San Cristóbal de La Laguna, Tenerife, Spain]%AShu, Y. [Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK]%AShu, Y. [Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK]%AColina, L. [Centro de Astrobiología (CSIC-INTA), Carretera de Ajalvir, E-28850 Torrejón de Ardoz, Madrid, Spain, Cosmic Dawn Center (DAWN)]%AColina, L. [Centro de Astrobiología (CSIC-INTA), Carretera de Ajalvir, E-28850 Torrejón de Ardoz, Madrid, Spain, Cosmic Dawn Center (DAWN)]%ABolton, A. [NSF’s National Optical-Infrared Astronomy Research Laboratory, 950 North Cherry Ave, Tucson, AZ 85719, USA]%ABolton, A. [NSF’s National Optical-Infrared Astronomy Research Laboratory, 950 North Cherry Ave, Tucson, AZ 85719, USA]%AÁlvarez-Márquez, J. [Centro de Astrobiología (CSIC-INTA), Carretera de Ajalvir, E-28850 Torrejón de Ardoz, Madrid, Spain]%AÁlvarez-Márquez, J. [Centro de Astrobiología (CSIC-INTA), Carretera de Ajalvir, E-28850 Torrejón de Ardoz, Madrid, Spain]%ABrownstein, J. [Department of Physics and Astronomy, University of Utah, 115 S. 1400 E., Salt Lake City, UT 84112, USA]%ABrownstein, J. [Department of Physics and Astronomy, University of Utah, 115 S. 1400 E., Salt Lake City, UT 84112, USA]%ACornachione, M. [Department of Physics, United States Naval Academy, 572C Holloway Road, Annapolis, MD 21402, USA]%ACornachione, M. [Department of Physics, United States Naval Academy, 572C Holloway Road, Annapolis, MD 21402, USA]%AGeier, S. [Instituto de Astrofísica de Canarias, C/Vía Láctea, s/n, E-38205 San Cristóbal de La Laguna, Tenerife, Spain, GRANTECAN, Cuesta de San José s/n, E-38712 Breña Baja, La Palma, Spain]%AGeier, S. [Instituto de Astrofísica de Canarias, C/Vía Láctea, s/n, E-38205 San Cristóbal de La Laguna, Tenerife, Spain, GRANTECAN, Cuesta de San José s/n, E-38712 Breña Baja, La Palma, Spain]%AJiménez-Ángel, C. [Instituto de Astrofísica de Canarias, C/Vía Láctea, s/n, E-38205 San Cristóbal de La Laguna, Tenerife, Spain, Dpto. Astrofísica, Universidad de La Laguna, E-38206 San Cristóbal de La Laguna, Tenerife, Spain]%AJiménez-Ángel, C. [Instituto de Astrofísica de Canarias, C/Vía Láctea, s/n, E-38205 San Cristóbal de La Laguna, Tenerife, Spain, Dpto. Astrofísica, Universidad de La Laguna, E-38206 San Cristóbal de La Laguna, Tenerife, Spain]%AKojima, T. [Institute for Cosmic Ray Research, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8582, Japan, Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan]%AKojima, T. [Institute for Cosmic Ray Research, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8582, Japan, Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan]%AMao, S. [Physics Department and Tsinghua Center for Astrophysics, Tsinghua University, Beijing 100084, China, National Astronomical Observatories, Chinese Academy of Sciences, 20 Datun Road, Beijing 100101, China]%AMao, S. [Physics Department and Tsinghua Center for Astrophysics, Tsinghua University, Beijing 100084, China, National Astronomical Observatories, Chinese Academy of Sciences, 20 Datun Road, Beijing 100101, China]%AMontero-Dorta, A. [Departamento de Física Matemática, Instituto de Física, Universidade de São Paulo, Rua do Matão 1371, CEP 05508-090 São Paulo, Brazil]%AMontero-Dorta, A. [Departamento de Física Matemática, Instituto de Física, Universidade de São Paulo, Rua do Matão 1371, CEP 05508-090 São Paulo, Brazil]%AOguri, M. [Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, Kavli Institute for the Physics and Mathematics of the Universe, University of Tokyo, Kashiwa, Chiba 277-8583, Japan]%AOguri, M. [Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, Kavli Institute for the Physics and Mathematics of the Universe, University of Tokyo, Kashiwa, Chiba 277-8583, Japan]%AOuchi, M. [Institute for Cosmic Ray Research, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8582, Japan, Kavli Institute for the Physics and Mathematics of the Universe, University of Tokyo, Kashiwa, Chiba 277-8583, Japan]%AOuchi, M. [Institute for Cosmic Ray Research, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8582, Japan, Kavli Institute for the Physics and Mathematics of the Universe, University of Tokyo, Kashiwa, Chiba 277-8583, Japan]%APoidevin, F. [Instituto de Astrofísica de Canarias, C/Vía Láctea, s/n, E-38205 San Cristóbal de La Laguna, Tenerife, Spain, Dpto. Astrofísica, Universidad de La Laguna, E-38206 San Cristóbal de La Laguna, Tenerife, Spain]%APoidevin, F. [Instituto de Astrofísica de Canarias, C/Vía Láctea, s/n, E-38205 San Cristóbal de La Laguna, Tenerife, Spain, Dpto. Astrofísica, Universidad de La Laguna, E-38206 San Cristóbal de La Laguna, Tenerife, Spain]%AShirley, R. [Instituto de Astrofísica de Canarias, C/Vía Láctea, s/n, E-38205 San Cristóbal de La Laguna, Tenerife, Spain, Dpto. Astrofísica, Universidad de La Laguna, E-38206 San Cristóbal de La Laguna, Tenerife, Spain]%AShirley, R. [Instituto de Astrofísica de Canarias, C/Vía Láctea, s/n, E-38205 San Cristóbal de La Laguna, Tenerife, Spain, Dpto. Astrofísica, Universidad de La Laguna, E-38206 San Cristóbal de La Laguna, Tenerife, Spain]%AZheng, Z. [Department of Physics and Astronomy, University of Utah, 115 S. 1400 E., Salt Lake City, UT 84112, USA]%AZheng, Z. [Department of Physics and Astronomy, University of Utah, 115 S. 1400 E., Salt Lake City, UT 84112, USA]%BJournal Name: Monthly Notices of the Royal Astronomical Society; Journal Volume: 492; Journal Issue: 1; Related Information: CHORUS Timestamp: 2020-12-15 12:42:21 %D2019%IOxford University Press %JJournal Name: Monthly Notices of the Royal Astronomical Society; Journal Volume: 492; Journal Issue: 1; Related Information: CHORUS Timestamp: 2020-12-15 12:42:21 %K %MOSTI ID: 10130373 %PMedium: X %TRest-frame UV properties of luminous strong gravitationally lensed Lyα emitters from the BELLS GALLERY Survey %XABSTRACT

We present deep rest-frame UV spectroscopic observations using the Gran Telescopio Canarias of six gravitationally lensed Lyα emitters (LAEs) at 2.36 < z < 2.82 selected from the BELLS GALLERY survey. By taking the magnifications into account, we show that LAEs can be as luminous as LLyα ≃ 30 × 1042 erg s−1 and MUV ≃ −23 (AB) without invoking an AGN component, in contrast with previous findings. We measure Lyα rest-frame equivalent widths, $EW_{0}\,\rm (Ly\alpha)$, ranging from 16 to 50 Å and Lyα escape fractions, $f_{\rm esc}\, \rm (Ly\alpha)$, from 10 per cent to 40 per cent. Large $EW_{0}\, \rm (Ly\alpha)$ and $f_{\rm esc}\, \rm (Ly\alpha)$ are found predominantly in LAEs showing weak low-ionization ISM absorption (EW0 ≲ 1 Å) and narrow Lyα profiles (≲300 km s−1 FWHM) with their peak close (≲80 km s−1) to their systemic redshifts, suggestive of less scatter from low H i column densities that favours the escape of Lyα photons. We infer stellar metallicities of Z/Z⊙ ≃ 0.2 in almost all LAEs by comparing the P-Cygni profiles of the wind lines N v1240 Å and C iv1549 Å with those from stellar synthesis models. We also find a trend between MUV and the velocity offset of ISM absorption lines, such as the most luminous LAEs experience stronger outflows. The most luminous LAEs show star formation rates up to ≃180 M⊙ yr−1, yet they appear relatively blue (βUV ≃ −1.8 to −2.0) showing evidence of little dust attenuation [E(B − V) = 0.10–0.14]. These luminous LAEs may be particular cases of young starburst galaxies that have had no time to form large amounts of dust. If so, they are ideal laboratories to study the early phase of massive star formation, stellar and dust mass growth, and chemical enrichment histories of starburst galaxies at high-z.

%0Journal Article