HOPS 78

Number of components: 5

Lbol (L⊙)

Tbol (K)

Class

Distance (pc)

Zone

7.8

38.1

0

392.8

OMC 3

ALMA 0.87 mm

Source

RA

(J2000)

DEC

(J2000)

Integrated Flux Density

(mJy)

Peak Intensity

(mJy/beam)

RMS

(mJy/beam)

ΔΦA

(")

Decon. Size

(")

Decon. PA

(º)

HOPS-78-A

05:35:25.966

-05:05:43.33

322.44 ± 3.44

45.69

0.55

2.1

0.44 x 0.14

171.1

HOPS-78-B

 05:35:26.148 -05:05:45.80 8.53 ± 1.12 6.77 0.67 5.3 0.05 x 0.05 179.4

HOPS-78-C

 05:35:26.181 -05:05:47.12 9.34 ± 1.80 4.49 0.75 6.4 0.17 x 0.08 131.9

HOPS-78-D

 05:35:25.920 -05:05:47.70 6.57 ± 1.48 3.34 0.62 4.3 0.15 x 0.03 175.4

HOPS-78-E

-

-

-

-

-

-

-

-

VLA 9 mm

Source

RA

(J2000)

DEC

(J2000)

Integrated Flux Density

(mJy)

Peak Intensity

(mJy/beam)

RMS

(µJy/beam)

ΔΦV

(")

Decon. Size

(")

Decon. PA

(º)

HOPS-78-A

05:35:25.966

-05:05:43.36

0.825 ± 0.022

0.495

7.62

2.2

0.09 x 0.08

49.5

HOPS-78-B

05:35:26.148

-05:05:45.81

0.088 ± 0.014

0.081

7.69

5.3

-

-
HOPS-78-C 05:35:26.181

-05:05:47.13

 0.042 ± 0.007 0.041 7.73 6.4 - -
HOPS-78-D 05:35:25.920

-05:05:47.70

  ≤ 0.02 ≤ 0.02 7.76 4.3 - -
HOPS-78-E 05:35:25.763

-05:05:43.83

 0.046 ± 0.007 0.039 7.6 0.9 - -

ACA 0.87 mm

Source

RA

(J2000)

DEC

(J2000)

Integrated Flux Density

(mJy)

Peak Intensity

(mJy/beam)

Mean RMS

(mJy/beam)

ΔΦV

(")

Decon. Size

(")

Decon. PA

(º)

HOPS-78

05:35:25.824

-05:05:43.8

1000.54

541.71

5.6

-

-

-

 

ALMA and VLA Derived Parameters

Source

R2σ, ALMA

(au)

R2σ, VLA

(au)

MD, ALMA

(M⊕)

MD, VLA

(M⊕)

QALMA

QVLA

Spectral Index

(0.87 – 9 mm)

Spectral Index

(8.1 -10 mm)

HOPS-78-A

147.1 ± 10.0

31.4 ± 10.0

187.9 ± 2.1

675.5 ± 18.0

1.30

0.55

2.6 ± 0.06

0.2 ± 0.22

HOPS-78-B

18.0 ± 10.0

 -

5.0 ± 0.8

72.0 ± 11.6

82.78

-

2.0 ± 0.11

1.9 ± 1.44

HOPS-78-C

 56.0 ± 13.0  - 5.4 ± 1.5 34.4 ± 5.8 58.22 - 2.3 ± 0.12 2.4 ± 1.38

HOPS-78-D

 51.4 ± 15.0  - 3.8 ± 1.0 ≤ 19 84.63 - - -

HOPS-78-E

 - - - 37.7 ± 5.7 - -  - -1.0 ± 1.64

 

Sources next/close to me: HOPS-76.

Same source, other names: VLA 5, Source 1 (Díaz-Rodríguez et al).

 

Source Images

Left: ALMA (0.87 mm), Right: VLA (9 mm) (Tobin et al. 2020).

Figure 1.1: At north west HOPS-78-A and south east HOPS-78-B.

 

Figure 1.2: At south east HOPS-78-C and north west HOPS-78-B.

 

Figure 1.3: At south west HOPS-78-D and east HOPS-78-C.

 

Figure 2: HOPS-78-A.

 

Figure 3: HOPS-78-B.

 

Figure 4: HOPS-78-C.

 

Figure 5: HOPS-78-D.

 

Figure 6: HOPS-78-E.

 

Figure 7: HOPS-78-D and HOPS-76.

 

ACA (0.87 mm) (Federman et al. 2022).

Figure 8: HOPS-78.

 

Source 1

 

RA(J2000) DEC(J2000)

Decon. Size

(" x ")

Decon PA

(º)

Flux Density 2014

(mJy)

Flux Density 2015

(mJy)

 Spectral Index

Nature

Evolved Stage

 Other Names
5 cm 3 cm 1.3 cm 0.7 cm 5 cm
05:35:25.9655 ± 0.0011 -05:05:43.369 ± 0.016 0.5 x 0.23 99 ± 5 < 0.65 - - - 0.37 ± 0.04 -0.3 ± 1.3 Class 0 HOPS-78

 

VLA  (5 cm, black contours) (Díaz-Rodriguez to be submitted).

Figure 9: Source 1. Superposition of the VLA A-configuration map with natural weighting at 5cm (black contours, Díaz-Rodriguez to be submitted) over ALMA emission at 870 micron (red contours, Tobin et al 2020).

 

Source 2

 

RA(J2000) DEC(J2000)

Decon. Size

(" x ")

Decon PA

(º)

Flux Density 2014

(mJy)

Flux Density 2015

(mJy)

 Spectral Index

Nature

Evolved Stage

 Other Names
5 cm 3 cm 1.3 cm 0.7 cm 5 cm
05:35:25.775 ± 0.003 -05:05:43.84 ± 0.05 - - < 0.65 - - - 0.062 ± 0.012 - YSO or Source 1 knot HOPS-78-E

 

Figure 10: Source 2 (HOPS-78-E). Superposition of the VLA A-configuration map with natural weighting at 5cm (black contours, Díaz-Rodriguez to be submitted) over ALMA emission at 870 micron (red contours, Tobin et al 2020).