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  2. Protoplanetary disk - Wikipedia

    en.wikipedia.org/wiki/Protoplanetary_disk

    A protoplanetary disk is a rotating circumstellar disc of dense gas and dust surrounding a young newly formed star, a T Tauri star, or Herbig Ae/Be star. The protoplanetary disk may not be considered an accretion disk; while the two are similar, an accretion disk is hotter and spins much faster. It is also found on black holes, not stars. This ...

  3. HH 30 - Wikipedia

    en.wikipedia.org/wiki/HH_30

    HH-30 (also V1213 Tauri) is an edge-on protoplanetary disk that is surrounded by jets and a disk wind. [6] HH-30 is located in the dark cloud LDN 1551 in the Taurus Molecular Cloud . The HH-30 disk is the prototype of an edge-on disk, [ 2 ] due to its early discovery with Hubble .

  4. Radial drift - Wikipedia

    en.wikipedia.org/wiki/Radial_drift

    Radial drift is a process by which dust particles migrates in Protoplanetary disks during the formation of planetesimals.It involves the motion of solid particles within the gas-dominated environment surrounding a young star and is crucial to understanding the formation of planets from protoplanetary disks.

  5. List of resolved circumstellar disks - Wikipedia

    en.wikipedia.org/wiki/List_of_resolved_circum...

    Only some are transitional disks between protoplanetary and debris. A few disks in this list are circumbinary disks. List of large disks This ...

  6. Circumstellar disc - Wikipedia

    en.wikipedia.org/wiki/Circumstellar_disc

    A circumstellar disc (or circumstellar disk) is a torus, pancake or ring-shaped accretion disk of matter composed of gas, dust, planetesimals, asteroids, or collision fragments in orbit around a star. Around the youngest stars, they are the reservoirs of material out of which planets may form.

  7. Proplyd 114-426 - Wikipedia

    en.wikipedia.org/wiki/Proplyd_114-426

    This study also found that the disk is surrounded by a large "foot-like" structure seen in H-alpha. [5] This "foot-like" structure could however belong to the Herbig-Haro object HH 530, which is located just north of proplyd 114-426. [7] The disk was imaged with ALMA and the disk mass was estimated to be 3.38 ±0.56 M J. [8]

  8. List of stars with proplyds - Wikipedia

    en.wikipedia.org/wiki/List_of_stars_with_proplyds

    First protoplanetary disc around a pulsar discovered 4U 0142+61: 2006 Brightest star with a protoplanetary disc Vega: 2005 Not confirmed See also.

  9. Accretion (astrophysics) - Wikipedia

    en.wikipedia.org/wiki/Accretion_(astrophysics)

    ALMA image of HL Tauri, a protoplanetary disk. In astrophysics, accretion is the accumulation of particles into a massive object by gravitationally attracting more matter, typically gaseous matter, into an accretion disk. [1] [2] Most astronomical objects, such as galaxies, stars, and planets, are formed by accretion processes.

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