Cloudy Workshop 2024

Asia/Tokyo
1236 (JAXA ISAS)

1236

JAXA ISAS

3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
Atsuchi, Nagi, Baba, Shunsuke (ISAS/JAXA), Inoue, Akio (Waseda University), Maehara, Komachi (SOKENDAI), Miura, Daiki (The University of Tokyo, ISAS/JAXA), Mochizuki, Yuto, Nagao, Tohru (Ehime University), Nakajima, Kimihiko (NAOJ), Otsuka, Masaaki (Okayama Observatory, Kyoto-U.), Tamura, Yoichi (Nagoya University), Tanimoto, Atsushi (Kagoshima University), Tsujimoto, Masahiro (JAXA ISAS)
Description

Cloudy is a widely-used code for the numerial radiative transfer calculations. It is useful to interpret astronomical spectra across wavelengths and is relevant to many projects that the Japanese astronomical community is deeply involved, including XRISM, Subaru PFS, JWST, and ALMA

We will host the Cloudy Workshop 2024 in Japan. The workshop is held since 2012 almost annually around the world, but this is the first in Japan and is also the first on-site workshop since the suspension due to the COVID19. We will invite Prof. Gary Ferland, Drs. Peter van Hoof, Chamani Gunasekera on site and Drs. Priyanka Chakraborty, Maryam Dehghanian, Christophe Morisset, and Gargi Shaw on-line as lecturers.

We will follow the tradition of the previous cloudy workshops. They are composed of 

  1. A series of lectures based on Astrophysics of Gaseous Nebulae and Active Galactic Nuclei (Osterbrock & Ferland)
  2. Research talks using cloudy.
  3. Several group works by participants to apply cloudy for selected topics.

In this workshop, 1 and 2 are open for remote participation via zoom. 3 is only for local participants.

This workshop is intended for graduate students and young researchers to gain experience in cloudy and foster domestic user community. No prior experience with cloudy is assumed, although participants should have a reasonable knowledge of undergraduate-level spectroscopy and atomic physics.

Cloudy's simulation of the outer region of the Perseus galaxy cluster. The figure shows resolved fine-structure one-electron doublets such as Fe XXVI. A spectral resolution of R = 0.25 eV and a log column density of 24 were used. J-splitting of the one-electron nP - 1S lines is a major improvement in the upcoming 2024 release of Cloudy, as described in the upcoming Gunasekera+2024

    • Others: Setup 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
      Convener: Tsujimoto, Masahiro (JAXA ISAS)
    • Others: Opening 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
      Convener: Tsujimoto, Masahiro (JAXA ISAS)
    • Lectures 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
      Conveners: Inoue, Akio (Waseda University), Mochizuki, Yuto
      • 1
        Introduction to Cloudy (1)

        LECTURE 1 - Gary Ferland (50 min)
        Title: Introduction to Cloudy
        Description: Participant introductions,
        Discussion of homework problem - Cloudy’s output
        Find, for example “save overview”, in Hazy
        Cloudy topic: Intro to Cloudy

        Speaker: Ferland, Gary
    • Group work: Elevator talks 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
      Conveners: Inoue, Akio (Waseda University), Mochizuki, Yuto
    • 12:00 PM
      Lunch
    • Lectures 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
      Conveners: Nagao, Tohru (Ehime University), Yamashita, Mai (ISAS/JAXA)
      • 2
        Introduction to Cloudy (2)

        LECTURE 2 - Gary Ferland (50 min)
        Title: Introduction to Cloudy (2)
        Description: input scripts, read hazy - commands,
        Test suite has lots of examples, mixed bag since physics may not be up to date since we keep models stable over time
        Cloudy topic: Running from the command line, Command line options

        Speaker: Ferland, Gary
      • 3
        Starting Cloudy

        LECTURE 3 - Gary Ferland (1 h)
        Title: Starting Cloudy
        Description: Have participants break up and choose different distances from a star, do a one-zone calculation, plot the spectrum, and give the kinetic temperature. This shows energy balance, ionization balance, the approach to STE, and the broad applicability of cloudy to very hot and very cold gas.
        Cloudy topic: This demonstrates solvers for energy, ionization, level population, chemistry balance, and the approach to STE

        Speaker: Ferland, Gary
      • 3:30 PM
        Break
      • 4
        The optical line thermostat effect and FIR lines to the rescue!

        Title: The optical line thermostat effect and FIR lines to the rescue!
        Description: Stoy-method temperature balance - vary O/H over a broad range and show [O III]/Hb for constant temperature and energy balance calculation. FIR lines JWST&ALMA have an advantage here

        Speaker: Ferland, Gary
    • Group work 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
      • 5
        Group session
      • 6
        Daily activity summary
    • Others: Banquet 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
      Convener: Tsujimoto, Masahiro (JAXA ISAS)
    • Others: Setup 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
      Convener: Tsujimoto, Masahiro (JAXA ISAS)
    • Lectures 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
      Conveners: Miura, Daiki (The University of Tokyo, ISAS/JAXA), Nakajima, Kimihiko (NAOJ)
      • 7
        1 keV feature in X-ray binaries (PART I)

        LECTURE 6 - Priyanka Chakraborty (30 min)

        Title: 1 keV feature in X-ray binaries (PART I)

        Description: Show plots from the 1 keV paper, origin of 1 keV feature, contour plots explaining the physics behind 1keV feature.
        How to create line blends within Cloudy, and how to change SEDs.

        Speaker: Chakraborty, Priyanka
      • 8
        Solving Mysteries using Cloudy

        LECTURE 9 - Maryam Dehghanian (50 min)
        Title: Solving Mysteries using Cloudy
        Description: I show how we can use Cloudy to make sense of UV observations and explain the unique and non-familiar observations that do not match the physic rules at first glance.
        Cloudy topic: save continue, grid, vary, save overview (temperature results)

        Speaker: Dehghanian, Maryam (Virginia Tech)
      • 9
        pyCloudy

        LECTURE 8 - Christophe Morisset (1 hour), Tuesday 11-12
        Title: pyCloudy
        Description:
        Cloudy topic: pyCloudy

        https://github.com/Morisset/Cloudy_Summer_School

        Speaker: Morisset, Christophe (Universidad Nacional Autónoma de México)
    • 12:00 PM
      Lunch
    • Lectures 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
      Conveners: Maehara, Komachi (SOKENDAI), Nakajima, Kimihiko (NAOJ)
      • 10
        Stellar Atmospheres
        Speaker: van Hoof, Peter (Royal Observatory of Belgium)
      • 11
        Parallel Cloudy

        LECTURE 7 - Peter van Hoof (30 min)
        Title: Parallel Cloudy
        Description: Also include grid commands.
        Cloudy topic: Parallel Cloudy

        Speaker: van Hoof, Peter (Royal Observatory of Belgium)
    • Group work 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
      • 12
        Group session
      • 13
        Daily activity summary
    • Others: Setup 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
      Convener: Tsujimoto, Masahiro (JAXA ISAS)
    • Lectures 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
      Conveners: Atsuchi, Nagi, Otsuka, Masaaki (Okayama Observatory, Kyoto-U.)
      • 14
        1 keV feature in X-ray binaries (PART II)

        LECTURE 11 - Priyanka Chakraborty (30 min)

        Title: 1 keV feature in X-ray binaries (PART II)
        Description: Show plots from the 1 keV paper, contour plots explaining the physics behind 1keV feature. Show applications on binaries with XMM-Newton, NICER spectra.

        Cloudy topic: How to produce fits files using cloudy, combine collisional and photoionized spectrum, How to import Cloudy spectra to XSPEC (https://ntrs.nasa.gov/api/citations/20070014934/downloads/20070014934.pdf). How to change continuum mesh resolution if using other instruments like XMM-Newton, NICER etc. Right now the default is XRISM.

        Speaker: Chakraborty, Priyanka
      • 15
        High-resolution X-rays with Cloudy

        LECTURE 16 - Chamani Gunasekera (30 min)
        Title: High-resolution X-rays with Cloudy
        Description: We are actively working on resolving the one-electron Lyman doublets in Cloudy, so that it may predict the high-resolution X-ray lines observed by microcalorimeter missions like XRISM and Athena.
        Cloudy topic: new “extra” Lyman Lines, command to change default doublet resolution

        Speaker: Gunasekera, Chamani (Space Telescope Science Institute)
      • 16
        Grains Physics

        LECTURE 10 - Peter van Hoof (50 min)
        Title: Grains Physics
        Description: grain effects on their environment, extinction, PE heating, stochastic heating, formation and destruction
        Cloudy topic: grains in Cloudy, build your own grains

        Speaker: van Hoof, Peter (Royal Observatory of Belgium)
    • 12:00 PM
      Lunch 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
    • Lectures 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
      Conveners: Mochizuki, Yuto, Otsuka, Masaaki (Okayama Observatory, Kyoto-U.)
      • 17
        Dust and Molecules in PNe (Herschel/ALMA/JWST)

        LECTURE 12 - Peter van Hoof (50 min)
        Title: Molecules in PNe (Herschel/ALMA/JWST)
        Description:
        Cloudy topic: molecules in Cloudy

        Speaker: van Hoof, Peter (Royal Observatory of Belgium)
    • Group work 1257

      1257

      JAXA ISAS

      • 18
        Group session 1257

        1257

        JAXA ISAS

      • 19
        Daily activity summary 1257

        1257

        JAXA ISAS

    • Others: (other meeting by ISAS admin; we need to evacuate from the main room) 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
    • Others: Setup 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
      Convener: Tsujimoto, Masahiro (JAXA ISAS)
    • Lectures 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
      Conveners: Maehara, Komachi (SOKENDAI), Tamura, Yoichi (Nagoya University)
      • 20
        BPT diagnostic diagrams and X-ray spectroscopy in the microcalorimeter era

        LECTURE 14 - Chamani Gunasekera & Priyanka Chakraborty (1 h 30 min)
        Title: BPT diagnostic diagrams
        Description: BPT-like diagrams - someone could do one using x-ray lines showing the method. This has not been done before
        (Add a small intro on new Hazy section explaining how to work with emission lines)
        perhaps Chamani first two papers, then Priyanka figs from thesis papers, her paper with Andy, or new figs, showing BPT with XRISM hard x-ray detector. Include FIR fine structure lines.

        X-ray spectroscopy in the microcalorimeter era:

        Improved Ka energies for XRISM. different line formation conditions, Cases A, B, C, D, how to simulate these line formation cases within cloudy
        Cloudy topic: save line list, LineLabels.in, high-resolution X-ray lines

        Speakers: Chakraborty, Priyanka, Gunasekera, Chamani (Space Telescope Science Institute)
      • 21
        Dust and Molecules in PNe (Herschel/ALMA/JWST)
        Speaker: van Hoof, Peter (Royal Observatory of Belgium)
    • Group work 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
      • 22
        Group session
    • 11:00 AM
      Lunch break 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
    • Others: ISAS museum tour & Group photo 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
      Convener: Tsujimoto, Masahiro (JAXA ISAS)
    • Lectures 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
      Conveners: Baba, Shunsuke (ISAS/JAXA), Yamashita, Mai (ISAS/JAXA)
      • 23
        Atomic, molecular, and grain emission and JWST

        LECTURE 13 - Chamani Gunasekera (50 min)
        Title: Dust Grains with JWST and Cloudy
        Description: JWST-dust extinction curves, HST ISS features. Extinction curves and self-consistent element depletion, interesting new features called ISS features are observed but not well understood, what chemistry is associated with these features?
        Cloudy topic: TBD, grains and depletion physics

        Speakers: Ferland, Gary, Shaw, Gargi (Tata Institute of Fundamental Research)
    • Group work 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
      • 24
        Group session
      • 25
        Daily activity summary
    • Others: Setup 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
      Convener: Tsujimoto, Masahiro (JAXA ISAS)
    • Lectures 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
      Conveners: Miura, Daiki (The University of Tokyo, ISAS/JAXA), Tanimoto, Atsushi (Kagoshima University)
      • 26
        Line Ratio Diagnostics for XRISM

        LECTURE 15 - Priyanka Chakraborty (50 min)
        Title: Line Ratio Diagnostics for XRISM
        Description: Atomic processes important for X-ray important for XRISM like RAD, electron escape scattering, Plots from thesis, Electron Scattering Command in Cloudy, plots from thesis, line-ratio diagnostics for the XRISM lines, e.g. H- and He-like Fe, S, Si, etc.
        Cloudy topic: Running input script to include important atomic processes, how to calculate line ratios for collisionally-ionized and photoionized spectrum, save line list ratio command, grd command.

        Speaker: Chakraborty, Priyanka
    • 10:00 AM
      Break 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
    • Group work 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
      • 27
        Group session
    • 12:00 PM
      Lunch 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
    • Group work 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
      Conveners: Maehara, Komachi (SOKENDAI), Tanimoto, Atsushi (Kagoshima University)
      • 28
        Summary presetation by each group
    • 2:30 PM
      Break 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
    • Group work 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
      Conveners: Atsuchi, Nagi, Baba, Shunsuke (ISAS/JAXA)
      • 29
        Summary presetation by each group
    • Others: Closing 1236

      1236

      JAXA ISAS

      3-1-1 Yoshino-dai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
      Convener: Tsujimoto, Masahiro (JAXA ISAS)