Seiji Fujimoto

New Paper Published by Nature

sfseiji — Wed, 13 Apr 2022 08:00:23 +0000

Our latest research has been published by Nature! We discovered a unique object that is considered a crucial “missing link” between galaxies and the supermassive black holes about 750 million years just after the Big Bang.

I contributed in many ways as a lead author, but I believe we have made it this far, starting with Gabe’s outstanding skills in analyzing the entire HST archive, accelerated by the great teamwork of DAWN, and strengthened by the prompt theoretical support from our friendly Italian colleagues.

I rediscovered the fascination of observation, where unexpected things are found by chance, and the thrill of research that is created by joining forces.

Paper link in Nature: https://www.nature.com/articles/s41586-022-04454-1
Release from NASA/STScI, ESA/Hubble, NOEMA, NAOJ/Subaru, Niels Bohr Institute/DAWN, INAF, Sapienza Università di Roma, and CAB/CSIC-INTA.

NASA Hubble Fellowship

sfseiji — Fri, 25 Mar 2022 03:00:07 +0000

I am thrilled to have been awarded the NASA Hubble Fellowship.
My next journey is to Texas, the USA, entitled “Decoding a Rosetta Stone for Galaxies at the Epoch of Reionization with JWST and ALMA”

Release from NASA, McDonald Observatory, and DAWN

Presentation in Sesto

sfseiji — Sat, 12 Mar 2022 23:35:23 +0000

I was invited and gave oral talks at the international conferences of
The Growth of Galaxies in the Early Universe – VII: Shaping the JWST Strategy
I2I: Linking Galaxy Physics from ISM to IGM Scales
held in Sesto (Italy) on 14-18th and 21-25th March 2022.
These were the first face-to-face conferences for most of the participants after 2 years of the covid pandemic.
We all know how difficult to make it possible and would like to thank the organizers.

Inoue Research Award for Young Scientists

sfseiji — Fri, 04 Feb 2022 03:00:01 +0000

I’m very honored to receive the Inoue Research Award for Young Scientists.
I’m truly thankful not only to the people who have been directly involved so far but also to the forerunners who have provided an environment where even students can have access to the observation data obtained with the most advanced telescopes such as ALMA. While continuing to enjoy cutting-edge research using ALMA, I would like to contribute to the development of the field of astrophysics and astronomy at large so that I can continue to carry on the baton that has been given to me.

Release from NAOJ: https://alma-telescope.jp/en/news/fujimoto-202112
Inoue Research Foundation: http://www.inoue-zaidan.or.jp/f-02.html

Awarded JWST Cycle1 Time

sfseiji — Thu, 29 Apr 2021 15:00:16 +0000

Nasa’s James Webb Space Telescope (JWST) Cycle1 programs have been selected.

I’m thrilled to have been awarded the JWST time on 1 (PI/leading) and 2 (co-I/collaborating) Cycle1 proposals.
The telescope is scheduled to launch to space later this year. I cannot wait to see what JWST brings to us!

Announcement from NASA (link)
Approved PI program (link)

Photo Credits: NASA, ESA, and A. Feild (STScI)

Press Release

sfseiji — Wed, 21 Apr 2021 15:00:20 +0000

We did a press release on April 22nd 2021 about a discovery reported in our recent papers of Fujimoto et al. 2021, ApJ, 911, 99 and Laporte et al. 2021, MNRAS in press.
The release was coordinated by the National Astronomical Observatory of Japan (NAOJ), ALMA observatory, University of Tokyo, Institute of Cosmic Ray Research Center (ICRR), and the Cosmic DAWN Center.
You can find more details from the following links:

NAOJ: https://www.nao.ac.jp/en/news/science/2021/20210422-alma.html
DAWN: https://cosmicdawn.dk/news/alma-discovers-rotating-infant-galaxy-with-help-of-natural-cosmic-telescope/
U. Tokyo: https://www.s.u-tokyo.ac.jp/en/info/7331/
ICRR: https://www.icrr.u-tokyo.ac.jp/en/news/10330/

Photo Credit: ALMA (ESO/NAOJ/NRAO), Fujimoto et al., NASA/ESA Hubble Space Telescope

New Paper Published by ApJ

sfseiji — Wed, 21 Apr 2021 15:00:11 +0000

Our paper is newly published from ApJ as Fujimoto et al. 2021, ApJ, 911, 99 (ADS).
We discover a remarkably bright, strong and multiply lensed star-forming galaxy at z=6.07, which provides us with an unprecedented view from stellar to cold interstellar medium in an early galaxy for the first time.

The left panel shows a Hubble Space Telescope color image of a massive galaxy cluster which causes a strong gravitational lensing effect and magnifies faint emission from galaxies behind. The multiply imaged galaxy, RXCJ0600-z6, is marked with the yellow squares. ALMA detects bright [CII] 158um emission line from these multiple images, shown in red contours and spectra in the middle and right panels, respectively.

Presentation in CIDER

sfseiji — Wed, 24 Feb 2021 15:00:37 +0000

I gave an oral talk about my recent works at an online international conference CIDER (The Cold ISM During the Epoch of Reionization) on February 24th and 25th 2021.

New Paper Published by ApJ

sfseiji — Mon, 31 Aug 2020 15:00:20 +0000

Our paper is newly published from ApJ as Fujimoto et al. 2020b, ApJ, 900, 1 (ADS).
We identify 30% of isolated ALPINE sources as having an extended [C II] component over 10 kpc scales detected at 4.1σ-10.9σ beyond the size of rest-frame UV and FIR continuum, which is likely explained by star-formation driven outflow.

Presentation in SAZERAC

sfseiji — Sun, 05 Jul 2020 15:00:30 +0000

I gave oral and poster talks about my recent works in the online international conference SAZERAC from July 6th to 9th 2020.
The picture shows the SAZERAC cocktail after which the conference was named.

New Paper Published by ApJ

sfseiji — Sat, 29 Feb 2020 15:00:50 +0000

Our paper is newly published from ApJ as Fujimoto et al. 2020a, ApJ, 891, 64 (ADS).
We present morphological properties in the high-resolution (FWHM ∼ 0″15) ALMA 1 mm map for an ultraluminous quasar at z = 6.30, SDSS J0100+2802, whose black hole (BH) mass M_BH is the most massive (∼1.2 × 10^¹⁰M_sun) at z > 6 ever known. We find that the 1-mm continuum emission of J0100+2802 is resolved into a quadruple system within a radius of 0″2, which can be interpreted as either multiple dusty star-forming regions in the host galaxy or multiple images due to strong gravitational lensing. Although a high-resolution map taken with HST shows a morphology with an apparently single component, in our fiducial lens mass model it can simply be explained by a ∼50 pc scale offset between the ALMA and HST emission regions.

Press Release

sfseiji — Mon, 16 Dec 2019 07:00:49 +0000

We did the press release on December 16th 2019 about our recent paper of Fujimoto et al. 2019, ApJ, 887, 2.
The release was coordinated by National Astronomical Observatory of Japan (NAOJ), U. Tokyo, U. Osaka, and Scuola Normale Speriore. You can find more details from the following links:

NAOJ: https://alma-telescope.jp/en/news/press/carbon-201912
NHK world: https://www3.nhk.or.jp/nhkworld/en/news/20191216_34/
Scuola Normale Superiore: https://normalenews.sns.it/carbon-cocoons-surround-growing-galaxies-alma-spots-earliest-environment-pollution-in-the-univers
Neils Bohr Institute: https://www.nbi.ku.dk/english/news/news19/carbon-cocoons-surround-growing-galaxies-far-beyond-previous-beliefs/