Browsing University of Hertfordshire by Author "Saxena, Aayush"

Now showing items 1-14 of 14

    • Carbonaceous dust grains seen in the first billion years of cosmic time 

      Witstok, Joris; Shivaei, Irene; Smit, Renske; Maiolino, Roberto; Carniani, Stefano; Curtis-Lake, Emma; Ferruit, Pierre; Arribas, Santiago; Bunker, Andrew J.; Cameron, Alex J.; Charlot, Stephane; Chevallard, Jacopo; Curti, Mirko; Graaff, Anna de; D'Eugenio, Francesco; Giardino, Giovanna; Looser, Tobias J.; Rawle, Tim; Pino, Bruno Rodríguez del; Willott, Chris; Alberts, Stacey; Baker, William M.; Boyett, Kristan; Egami, Eiichi; Eisenstein, Daniel J.; Endsley, Ryan; Hainline, Kevin N.; Ji, Zhiyuan; Johnson, Benjamin D.; Kumari, Nimisha; Lyu, Jianwei; Nelson, Erica; Perna, Michele; Rieke, Marcia; Robertson, Brant E.; Sandles, Lester; Saxena, Aayush; Scholtz, Jan; Sun, Fengwu; Tacchella, Sandro; Willmer, Christopher N. A. (2023-07-19)
      Large dust reservoirs (up to approximately 10 8 M ⊙) have been detected 1–3 in galaxies out to redshift z ≃ 8, when the age of the Universe was only about 600 Myr. Generating substantial amounts of dust within such a short ...

    • The Cosmos in its Infancy: JADES Galaxy Candidates at z > 8 in GOODS-S and GOODS-N 

      Hainline, Kevin N.; Johnson, Benjamin D.; Robertson, Brant; Tacchella, Sandro; Helton, Jakob M.; Sun, Fengwu; Eisenstein, Daniel J.; Simmonds, Charlotte; Topping, Michael W.; Whitler, Lily; Willmer, Christopher N. A.; Rieke, Marcia; Suess, Katherine A.; Hviding, Raphael E.; Cameron, Alex J.; Alberts, Stacey; Baker, William M.; Bhatawdekar, Rachana; Boyett, Kristan; Bunker, Andrew J.; Carniani, Stefano; Charlot, Stephane; Chen, Zuyi; Curti, Mirko; Curtis-Lake, Emma; D'Eugenio, Francesco; Egami, Eiichi; Endsley, Ryan; Hausen, Ryan; Ji, Zhiyuan; Looser, Tobias J.; Lyu, Jianwei; Maiolino, Roberto; Nelson, Erica; Puskas, David; Rawle, Tim; Sandles, Lester; Saxena, Aayush; Smit, Renske; Stark, Daniel P.; Williams, Christina C.; Willott, Chris; Witstok, Joris (2024-03-18)
      We present a catalog of 717 candidate galaxies at z > 8 selected from 125 square arcmin of NIRCam imaging as part of the JWST Advanced Deep Extragalactic Survey (JADES). We combine the full JADES imaging data set with data ...

    • First insights into the ISM at z > 8 with JWST: possible physical implications of a high [O III] λ4363/[O III] λ5007 

      Katz, Harley; Saxena, Aayush; Cameron, Alex J.; Carniani, Stefano; Bunker, Andrew J.; Arribas, Santiago; Bhatawdekar, Rachana; Bowler, Rebecca A. A.; Boyett, Kristan N. K.; Cresci, Giovanni; Curtis-Lake, Emma; D'Eugenio, Francesco; Kumari, Nimisha; Looser, Tobias J.; Maiolino, Roberto; Ubler, Hannah; Willott, Chris; Witstok, Joris (2022-09-20)
      We present a detailed analysis of the rest-frame optical emission line ratios for three spectroscopically confirmed galaxies at z > 7.5. The galaxies were identified in the James Webb Space Telescope (JWST) Early Release ...

    • Inside the bubble: exploring the environments of reionisation-era Lyman-α emitting galaxies with JADES and FRESCO⋆ 

      Witstok, Joris; Smit, Renske; Saxena, Aayush; Jones, Gareth C.; Helton, Jakob M.; Sun, Fengwu; Maiolino, Roberto; Kumari, Nimisha; Stark, Daniel P.; Bunker, Andrew J.; Arribas, Santiago; Baker, William M.; Bhatawdekar, Rachana; Boyett, Kristan; Cameron, Alex J.; Carniani, Stefano; Charlot, Stephane; Chevallard, Jacopo; Curti, Mirko; Curtis-Lake, Emma; Eisenstein, Daniel J.; Endsley, Ryan; Hainline, Kevin; Ji, Zhiyuan; Johnson, Benjamin D.; Looser, Tobias J.; Nelson, Erica; Perna, Michele; Rix, Hans-Walter; Robertson, Brant E.; Sandles, Lester; Scholtz, Jan; Simmonds, Charlotte; Tacchella, Sandro; Übler, Hannah; Williams, Christina C.; Willmer, Christopher N. A.; Willott, Chris (2024-02-01)
      We present a study of the environments of 17 Lyman-α emitting galaxies (LAEs) in the reionisation-era (5.8 < z < 8) identified by JWST/NIRSpec as part of the JWST Advanced Deep Extragalactic Survey (JADES). Unless situated ...

    • Investigating the Unification of LOFAR-detected powerful AGN in the Boötes Field 

      Morabito, Leah K.; Williams, W. L.; Duncan, Kenneth J.; Röttgering, H.~J.~A.; Miley, George; Saxena, Aayush; Barthel, Peter; Best, Philip N.; Bruggen, M.; Brunetti, G.; Chyży, K. T.; Engels, D.; Hardcastle, M. J.; Harwood, J. J.; Jarvis, Matt J.; Mahony, E. K.; Prandoni, I.; Shimwell, Timothy W.; Shulevski, Alexander; Tasse, C. (2017-08-01)
      Low radio frequency surveys are important for testing unified models of radio-loud quasars and radio galaxies. Intrinsically similar sources that are randomly oriented on the sky will have different projected linear sizes. ...

    • The ionising photon production efficiency at z~6 for Lyman-alpha emitters using JEMS and MUSE 

      Simmonds, Charlotte; Tacchella, Sandro; Maseda, Michael V.; Baker, William M.; Witten, Callum; Johnson, Benjamin D.; Robertson, Brant; Saxena, Aayush; Sun, Fengwu; Witstok, Joris; Bhatawdekar, Rachana; Boyett, Kristan; Bunker, Andrew J.; Charlot, Stephane; Curtis-Lake, Emma; Egami, Eiichi; Eisenstein, Daniel J.; Ji, Zhiyuan; Maiolino, Roberto; Sandles, Lester; Smit, Renske; Übler, Hannah; Willott, Chris (2023-06-15)
      We study the ionising photon production efficiency at the end of the Epoch of Reionisation ($z \sim 5.4 - 6.6$) for a sample of 30 Lyman-$\alpha$ emitters. This is a crucial quantity to infer the ionising photon budget of ...

    • JADES Imaging of GN-z11: Revealing the Morphology and Environment of a Luminous Galaxy 430 Myr after the Big Bang 

      Tacchella, Sandro; Eisenstein, Daniel J.; Hainline, Kevin; Johnson, Benjamin D.; Baker, William M.; Helton, Jakob M.; Robertson, Brant; Suess, Katherine A.; Chen, Zuyi; Nelson, Erica; Puskás, Dávid; Sun, Fengwu; Alberts, Stacey; Egami, Eiichi; Hausen, Ryan; Rieke, George; Rieke, Marcia; Shivaei, Irene; Willmer, Christopher N. A.; Bunker, Andrew; Cameron, Alex J.; Carniani, Stefano; Charlot, Stephane; Curti, Mirko; Curtis-Lake, Emma; Looser, Tobias J.; Maiolino, Roberto; Maseda, Michael V.; Rawle, Tim; Rix, Hans-Walter; Smit, Renske; Übler, Hannah; Willott, Chris; Witstok, Joris; Baum, Stefi; Bhatawdekar, Rachana; Boyett, Kristan; Danhaive, A. Lola; Graaff, Anna de; Endsley, Ryan; Ji, Zhiyuan; Lyu, Jianwei; Sandles, Lester; Saxena, Aayush; Scholtz, Jan; Topping, Michael W.; Whitler, Lily (2023-07-20)
      We present JWST NIRCam nine-band near-infrared imaging of the luminous z = 10.6 galaxy GN-z11 from the JWST Advanced Deep Extragalactic Survey of the GOODS-N field. We find a spectral energy distribution (SED) entirely ...

    • JADES Initial Data Release for the Hubble Ultra Deep Field: Revealing the Faint Infrared Sky with Deep JWST NIRCam Imaging 

      Rieke, Marcia J.; Robertson, Brant; Tacchella, Sandro; Hainline, Kevin; Johnson, Benjamin D.; Hausen, Ryan; Ji, Zhiyuan; Willmer, Christopher N. A.; Eisenstein, Daniel J.; Puskás, Dávid; Alberts, Stacey; Arribas, Santiago; Baker, William M.; Baum, Stefi; Bhatawdekar, Rachana; Bonaventura, Nina; Boyett, Kristan; Bunker, Andrew J.; Cameron, Alex J.; Carniani, Stefano; Charlot, Stephane; Chevallard, Jacopo; Chen, Zuyi; Curti, Mirko; Curtis-Lake, Emma; Danhaive, A. Lola; DeCoursey, Christa; Dressler, Alan; Egami, Eiichi; Endsley, Ryan; Helton, Jakob M.; Hviding, Raphael E.; Kumari, Nimisha; Looser, Tobias J.; Lyu, Jianwei; Maiolino, Roberto; Maseda, Michael V.; Nelson, Erica J.; Rieke, George; Rix, Hans-Walter; Sandles, Lester; Saxena, Aayush; Sharpe, Katherine; Shivaei, Irene; Skarbinski, Maya; Smit, Renske; Stark, Daniel P.; Stone, Meredith; Suess, Katherine A.; Sun, Fengwu; Topping, Michael; Übler, Hannah; Villanueva, Natalia C.; Wallace, Imaan E. B.; Williams, Christina C.; Willott, Chris; Whitler, Lily; Witstok, Joris; Woodrum, Charity (2023-11-01)
      JWST has revolutionized the field of extragalactic astronomy with its sensitive and high-resolution infrared view of the distant Universe. Adding to the new legacy of JWST observations, we present the first NIRCam imaging ...

    • JADES NIRSpec Spectroscopy of GN-z11: Lyman-$α$ emission and possible enhanced nitrogen abundance in a $z=10.60$ luminous galaxy 

      Bunker, Andrew J.; Saxena, Aayush; Cameron, Alex J.; Willott, Chris J.; Curtis-Lake, Emma; Jakobsen, Peter; Carniani, Stefano; Smit, Renske; Maiolino, Roberto; Witstok, Joris; Curti, Mirko; D'Eugenio, Francesco; Jones, Gareth C.; Ferruit, Pierre; Arribas, Santiago; Charlot, Stephane; Chevallard, Jacopo; Giardino, Giovanna; Graaff, Anna de; Looser, Tobias J.; Luetzgendorf, Nora; Maseda, Michael V.; Rawle, Tim; Rix, Hans-Walter; Pino, Bruno Rodriguez Del; Alberts, Stacey; Egami, Eiichi; Eisenstein, Daniel J.; Endsley, Ryan; Hainline, Kevin; Hausen, Ryan; Johnson, Benjamin D.; Rieke, George; Rieke, Marcia; Robertson, Brant E.; Shivaei, Irene; Stark, Daniel P.; Sun, Fengwu; Tacchella, Sandro; Tang, Mengtao; Williams, Christina C.; Willmer, Christopher N. A.; Baker, William M.; Baum, Stefi; Bhatawdekar, Rachana; Bowler, Rebecca; Boyett, Kristan; Chen, Zuyi; Circosta, Chiara; Helton, Jakob M.; Ji, Zhiyuan; Kumari, Nimisha; Lyu, Jianwei; Nelson, Erica; Parlanti, Eleonora; Perna, Michele; Sandles, Lester; Scholtz, Jan; Suess, Katherine A.; Topping, Michael W.; Uebler, Hannah; Wallace, Imaan E. B.; Whitler, Lily (2023-09-11)
      We present JADES JWST/NIRSpec spectroscopy of GN-z11, the most luminous candidate z>10 Lyman break galaxy in the GOODS-North field with MUV =-21.5. We derive a redshift of z = 10.603 (lower than previous determinations) ...

    • Jades: Discovery of extremely high equivalent width Lyman- α emission from a faint galaxy within an ionized bubble at z = 7.3 

      Saxena, Aayush; Robertson, Brant E.; Bunker, Andrew J.; Endsley, Ryan; Cameron, Alex J.; Charlot, Stephane; Simmonds, Charlotte; Tacchella, Sandro; Witstok, Joris; Willott, Chris; Carniani, Stefano; Curtis-Lake, Emma; Ferruit, Pierre; Jakobsen, Peter; Arribas, Santiago; Chevallard, Jacopo; Curti, Mirko; D'Eugenio, Francesco; Graaff, Anna De; Jones, Gareth C.; Looser, Tobias J.; Maseda, Michael V.; Rawle, Tim; Rix, Hans-Walter; Pino, Bruno Rodríguez Del; Smit, Renske; Übler, Hannah; Eisenstein, Daniel J.; Hainline, Kevin; Hausen, Ryan; Johnson, Benjamin D.; Rieke, Marcia; Williams, Christina C.; Willmer, Christopher N. A.; Baker, William M.; Bhatawdekar, Rachana; Bowler, Rebecca; Boyett, Kristan; Chen, Zuyi; Egami, Eiichi; Ji, Zhiyuan; Kumari, Nimisha; Nelson, Erica; Perna, Michele; Sandles, Lester; Scholtz, Jan; Shivaei, Irene (2023-10-05)
      We report the discovery of a remarkable Lyα emitting galaxy at z = 7.2782, JADES-GS+53.16746-27.7720 (shortened to JADES-GS-z7-LA), with rest-frame equivalent width, EW 0(Lyα) = 388.0 ± 88.8 Å and UV magnitude -17.0. The ...

    • Jades: Probing interstellar medium conditions at z ∼ 5.5-9.5 with ultra-deep JWST/NIRSpec spectroscopy 

      Cameron, Alex J.; Saxena, Aayush; Bunker, Andrew J.; D'Eugenio, Francesco; Carniani, Stefano; Maiolino, Roberto; Curtis-Lake, Emma; Ferruit, Pierre; Jakobsen, Peter; Arribas, Santiago; Bonaventura, Nina; Charlot, Stephane; Chevallard, Jacopo; Curti, Mirko; Looser, Tobias J.; Maseda, Michael V.; Rawle, Tim; Pino, Bruno Rodríguez Del; Smit, Renske; Übler, Hannah; Willott, Chris; Witstok, Joris; Egami, Eiichi; Eisenstein, Daniel J.; Johnson, Benjamin D.; Hainline, Kevin; Rieke, Marcia; Robertson, Brant E.; Stark, Daniel P.; Tacchella, Sandro; Williams, Christina C.; Willmer, Christopher N. A.; Bhatawdekar, Rachana; Bowler, Rebecca; Boyett, Kristan; Circosta, Chiara; Helton, Jakob M.; Jones, Gareth C.; Kumari, Nimisha; Ji, Zhiyuan; Nelson, Erica; Parlanti, Eleonora; Sandles, Lester; Scholtz, Jan; Sun, Fengwu (2023-09-12)
      We present emission-line ratios from a sample of 27 Lyman-break galaxies from z∼ 5.5-9.5 with-17.0< M1500<-20.4, measured from ultra-deep JWST/NIRSpec multi-object spectroscopy from the JWST Advanced Deep Extragalactic ...

    • Low-mass bursty galaxies in JADES efficiently produce ionizing photons and could represent the main drivers of reionization 

      Simmonds, C.; Tacchella, S.; Hainline, K.; Johnson, B. D.; McClymont, W.; Robertson, B.; Saxena, Aayush; Sun, Fengwu; Witten, C.; Baker, William M.; Bhatawdekar, R.; Boyett, K.; Bunker, A. J.; Charlot, S.; Curtis-Lake, E.; Egami, E.; Eisenstein, D. J.; Hausen, R.; Maiolino, R.; Maseda, M. V.; Scholtz, J.; Williams, C. C.; Willot, C.; Witstok, J. (2024-01-01)
      We use deep imaging from the JWST Advanced Deep Extragalactic Survey (JADES) to study the evolution of the ionizing photon production efficiency, ζion. We estimate ζion for a sample of 677 galaxies at z ∼4-9 using NIRCam ...

    • A recently quenched galaxy 700 million years after the Big Bang 

      Looser, Tobias J.; D'Eugenio, Francesco; Maiolino, Roberto; Witstok, Joris; Sandles, Lester; Curtis-Lake, Emma; Chevallard, Jacopo; Tacchella, Sandro; Johnson, Benjamin D.; Baker, William M.; Suess, Katherine A.; Carniani, Stefano; Ferruit, Pierre; Arribas, Santiago; Bonaventura, Nina; Bunker, Andrew J.; Cameron, Alex J.; Charlot, Stephane; Curti, Mirko; Graaff, Anna de; Maseda, Michael V.; Rawle, Tim; Rix, Hans-Walter; Pino, Bruno Rodriguez Del; Smit, Renske; Übler, Hannah; Willott, Chris; Alberts, Stacey; Egami, Eiichi; Eisenstein, Daniel J.; Endsley, Ryan; Hausen, Ryan; Rieke, Marcia; Robertson, Brant; Shivaei, Irene; Williams, Christina C.; Boyett, Kristan; Chen, Zuyi; Ji, Zhiyuan; Jones, Gareth C.; Kumari, Nimisha; Nelson, Erica; Perna, Michele; Saxena, Aayush; Scholtz, Jan (2024-03-06)
      Local and low-redshift ($z$10^{10}~M_{\odot}$) and relatively old. Here we report a (mini-)quenched galaxy at z$=$7.3, when the Universe was only 700~Myr old. The JWST/NIRSpec spectrum is very blue ($U$-$V$$=$0.16$\pm0.03$~mag), ...

    • Spectroscopic confirmation of four metal-poor galaxies at z=10.3-13.2 

      Curtis-Lake, Emma; Carniani, Stefano; Cameron, Alex; Charlot, Stephane; Jakobsen, Peter; Maiolino, Roberto; Bunker, Andrew; Witstok, Joris; Smit, Renske; Chevallard, Jacopo; Willott, Chris; Ferruit, Pierre; Arribas, Santiago; Bonaventura, Nina; Curti, Mirko; D'Eugenio, Francesco; Franx, Marijn; Giardino, Giovanna; Looser, Tobias J.; Lützgendorf, Nora; Maseda, Michael V.; Rawle, Tim; Rix, Hans-Walter; Pino, Bruno Rodriguez del; Übler, Hannah; Sirianni, Marko; Dressler, Alan; Egami, Eiichi; Eisenstein, Daniel J.; Endsley, Ryan; Hainline, Kevin; Hausen, Ryan; Johnson, Benjamin D.; Rieke, Marcia; Robertson, Brant; Shivaei, Irene; Stark, Daniel P.; Tacchella, Sandro; Williams, Christina C.; Willmer, Christopher N. A.; Bhatawdekar, Rachana; Bowler, Rebecca; Boyett, Kristan; Chen, Zuyi; Graaff, Anna de; Helton, Jakob M.; Hviding, Raphael E.; Jones, Gareth C.; Kumari, Nimisha; Lyu, Jianwei; Nelson, Erica; Perna, Michele; Sandles, Lester; Saxena, Aayush; Suess, Katherine A.; Sun, Fengwu; Topping, Michael W.; Wallace, Imaan E. B.; Whitler, Lily (2023-05)
      Finding and characterizing the first galaxies that illuminated the early universe at cosmic dawn is pivotal to understand the physical conditions and the processes that led to the formation of the first stars. In the first ...