Significant dust-obscured star formation in luminous Lyman-break galaxies at z ~ 7-8
| العنوان: | Significant dust-obscured star formation in luminous Lyman-break galaxies at z ~ 7-8 |
|---|---|
| المؤلفون: | Sander Schouws, Mauro Stefanon, Rychard Bouwens, Renske Smit, Jacqueline Hodge, Ivo Labbé, Hiddo Algera, Leindert Boogaard, Stefano Carniani, Yoshinobu Fudamoto, Benne W. Holwerda, Garth D. Illingworth, Roberto Maiolino, Michael Maseda, Pascal Oesch, Paul van der Werf |
| المساهمون: | Schouws, S [0000-0001-9746-0924], Stefanon, M [0000-0001-7768-5309], Bouwens, R [0000-0002-4989-2471], Smit, R [0000-0001-8034-7802], Hodge, J [0000-0001-6586-8845], Labbé, I [0000-0002-2057-5376], Algera, H [0000-0002-4205-9567], Boogaard, L [0000-0002-3952-8588], Carniani, S [0000-0002-6719-380X], Fudamoto, Y [0000-0001-7440-8832], Holwerda, BW [0000-0002-4884-6756], Illingworth, GD [0000-0002-8096-2837], Maiolino, R [0000-0002-4985-3819], Maseda, M [0000-0003-0695-4414], Oesch, P [0000-0001-5851-6649], Van Der Werf, P [0000-0001-5434-5942], Apollo - University of Cambridge Repository, Schouws, S., Stefanon, M., Bouwens, R., Smit, R., Hodge, J., Labbe, I., Algera, H., Boogaard, L., Carniani, Stefano, Fudamoto, Y., Holwerda, B. W., Illingworth, G. D., Maiolino, Roberto, Maseda, M., Oesch, Pascal, Van Der Werf, P. |
| المصدر: | The Astrophysical Journal, 928(1):31 |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | astro-ph.GA, Interstellar dust extinction, FOS: Physical sciences, Astronomy and Astrophysics, Galaxies, Astrophysics - Astrophysics of Galaxies, Lyman-break galaxies, Settore FIS/05 - Astronomia e Astrofisica, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), Galaxy evolution, High-redshift galaxies, Interstellar dust |
| الوصف: | We make use of ALMA continuum observations of $15$ luminous Lyman-break galaxies at $z$$\sim$$7$$-$$8$ to probe their dust-obscured star-formation. These observations are sensitive enough to probe to obscured SFRs of $20$ $M_{\odot}$$/$$yr$ ($3\sigma$). Six of the targeted galaxies show significant ($\geq$$3$$\sigma$) dust continuum detections, more than doubling the number of known dust-detected galaxies at $z$$>$$6.5$. Their IR luminosities range from $2.7$$\times$$10^{11}$ $L_{\odot}$ to $1.1$$\times$$10^{12}$ $L_{\odot}$, equivalent to obscured SFRs of $20$ to $105$ $M_{\odot}$$/$$yr$. We use our results to quantify the correlation of the infrared excess IRX on the UV-continuum slope $\beta_{UV}$ and stellar mass. Our results are most consistent with an SMC attenuation curve for intrinsic $UV$-slopes $\beta_{UV,intr}$ of $-2.63$ and most consistent with an attenuation curve in-between SMC and Calzetti for $\beta_{UV,intr}$ slopes of $-2.23$, assuming a dust temperature $T_d$ of $50$ K. Our fiducial IRX-stellar mass results at $z$$\sim$$7$$-$$8$ are consistent with marginal evolution from $z$$\sim$$0$. We then show how both results depend on $T_d$. For our six dust-detected sources, we estimate their dust masses and find that they are consistent with dust production from SNe if the dust destruction is low ($ ERC STFC |
| وصف الملف: | application/pdf; text/xml |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::149034b1491ef29e66a53d4397f97608 https://hdl.handle.net/1887/3515546 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....149034b1491ef29e66a53d4397f97608 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |