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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 .
2MASS J04202144+2813491 (also known as Tau 042021) [3] [6] is an edge-on protoplanetary disk in the Taurus Molecular Cloud. [3]The star is hidden behind the edge-on disk. Early estimates found that it has a mass of 0.272 ±0.009 M ☉, [7] but a later study did find a higher mass of 0.3–0.4 M
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.
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]
Only some are transitional disks between protoplanetary and debris. A few disks in this list are circumbinary disks. List of large disks This ...
The protoplanetary disk around PDS 70 was first hypothesized in 1992 [14] and fully imaged in 2006 with phase-mask coronagraph on the VLT. [2] The disk has a radius of approximately 140 au . In 2012 a large gap (~ 65 au ) in the disk was discovered, which was thought to be caused by planetary formation.
In January 1999, NASA announced a protoplanetary disk around HD 141569. The Hubble Space Telescope showed that the disk appears to come in two parts (inner and outer). It superficially resembles the largest gap in Saturn's rings (known as the Cassini division). The vast disk is 75 billion miles across (13 times the diameter of Neptune's orbit ...
His book Evolution of the protoplanetary cloud and formation of the Earth and the planets, [31] which was translated to English in 1972, had a long-lasting effect on how scientists thought about the formation of the planets. [32] In this book, almost all major problems of the planetary formation process were formulated, and some of them were ...