HD 28375

{{Starbox image

| image =

{{Location mark

|image=Taurus constellation map.svg|alt=|float=center|width=260

|label=|position=right

|mark=Red circle.svg|mark_width=8|mark_link=HD 28375

|x=551|y=961

}}

| caption = Location of HD 28375 (circled)

}}

{{Starbox observe

| epoch = J2000

| constell = Taurus

| ra = {{RA|04|28|32.12105}}

| dec = {{DEC|+01|22|50.9711}}

| appmag_v = 5.53

}}

{{Starbox character

| type = main sequence

| class = B5V

| b-v = {{Val|-0.099|0.008}}

| u-b = -0.55

| variable =

}}

{{Starbox astrometry

| radial_v = {{Val|18.0|4.3}}

| prop_mo_ra = +20.236

| prop_mo_dec = −20.406

| parallax = 6.4010

| p_error = 0.0687

| parallax_footnote =

| absmag_v = 0.19

}}

{{Starbox detail

| mass = 3.9

| radius = 3.0

| temperature = 13,267

| luminosity = 311

| gravity = 3.92

| metal_fe = {{Val|0.05|0.06}}

| rotational_velocity = {{Val|13|3}}

| age_myr = {{Val|3.1|2.1}}

}}

{{Starbox catalog

| names = {{odlist | BD=+01°757 | FK5=1123 | HD=28375 | HIP=20884 | HR=1415 | SAO=111845 | GC=5441 }}

}}

{{Starbox reference

| Simbad = HD+28375

}}

HD 28375 is a single star in the equatorial constellation of Taurus, near the southern constellation border with Eridanus. It was previously known by the Flamsteed designation 44 Eridani, although the name has fallen out of use because constellations were redrawn, placing the star out of Eridanus and into Taurus. The star is blue-white in hue and is dimly visible to the naked eye with an apparent visual magnitude of 5.53. The distance to this star is approximately 510 light-years based on parallax. It is drifting further away with a radial velocity of 18 km/s, after having come to within an estimated {{Convert|76.31|pc|ly|0|disp=out|abbr=off}} some 3.7 million years ago.

Molnar (1972) found a stellar classification of B5V for this object, matching a B-type main-sequence star. Houk and Swift assigned it a class of B5 III/IV, suggesting it is a more evolved star that is entering the giant stage. Evolutionary models place it near the end of its main sequence life. It has nearly four times the mass of the Sun and is around three million years old, with a projected rotational velocity of just 13 km/s. The star is radiating 311 times the luminosity of the Sun from its photosphere at an effective temperature of about 13,267 K.

An infrared excess has been detected, indicating the presence of a circumstellar disk. The dust has a temperature of about 119 K and is orbiting {{Val|67|ul=AU}} from the star.

References

{{reflist|refs=

{{citation

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| last1=Anderson | first1=E. | last2=Francis | first2=Ch.

| journal=Astronomy Letters

| volume=38 | issue=5 | pages=331 | year=2012

| bibcode=2012AstL...38..331A | arxiv=1108.4971

| doi=10.1134/S1063773712050015 | s2cid=119257644 | postscript=. }}

{{citation

| last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A.

| title=A catalogue of multiplicity among bright stellar systems

| journal=Monthly Notices of the Royal Astronomical Society

| volume=389 | issue=2 | pages=869–879 | date=September 2008

| doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | arxiv=0806.2878

| bibcode=2008MNRAS.389..869E | s2cid=14878976 | postscript=. }}

{{citation

| display-authors=1 | last1=Gáspár | first1=András

| last2=Rieke | first2=George H. | last3=Ballering | first3=Nicholas

| title=The Correlation between Metallicity and Debris Disk Mass

| journal=The Astrophysical Journal | postscript=.

| volume=826 | issue=2 | pages=171 | year=2016

| bibcode=2016ApJ...826..171G | arxiv=1604.07403

| doi=10.3847/0004-637X/826/2/171 | s2cid=119241004 | doi-access=free }}

{{citation

| display-authors=1 | last1=Tetzlaff | first1=N.

| last2=Neuhäuser | first2=R. | last3=Hohle | first3=M. M.

| title=A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun

| journal=Monthly Notices of the Royal Astronomical Society

| volume=410 | issue=1 | pages=190–200 | date=January 2011

| bibcode=2011MNRAS.410..190T | arxiv=1007.4883

| doi=10.1111/j.1365-2966.2010.17434.x | doi-access=free | s2cid=118629873 }}

{{citation

| last1=Houk | first1=N. | last2=Swift | first2=C.

| title=Michigan catalogue of two-dimensional spectral types for the HD Stars

| journal=Michigan Spectral Survey

| volume=5 | year=1999 | bibcode=1999MSS...C05....0H }}

{{citation |bibcode=1972ApJ...175..453M |title=The Helium-Weak Stars |last1=Molnar |first1=Michael R. |journal=The Astrophysical Journal |date=1972 |volume=175 |page=453 |doi=10.1086/151570 }}

{{cite journal|bibcode=2014AJ....148....3L|doi=10.1088/0004-6256/148/1/3|arxiv=1308.5593|title=Bright Debris Disk Candidates Detected with Theakari/far-Infrared Surveyor|journal=The Astronomical Journal|volume=148|pages=3|year=2014|last1=Liu|first1=Qiong|last2=Wang|first2=Tinggui|last3=Jiang|first3=Peng|issue=1|s2cid=117353888}}

{{cite journal|title=UBVRIJKL Photometry of the Bright Stars|author1=Johnson, H. L.|journal=Communications of the Lunar and Planetary Laboratory|volume=4|pages=99|date=1966|bibcode=1966CoLPL...4...99J}}

{{cite journal|title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system|author=Gontcharov, G. A.|date=2006|journal=Astronomy Letters|volume=32|issue=11|pages=759–771|bibcode=2006AstL...32..759G|doi=10.1134/S1063773706110065|arxiv=1606.08053|s2cid=119231169}}

{{cite journal|bibcode=2012AJ....144..130B|doi=10.1088/0004-6256/144/5/130|arxiv=1208.1674|title=Projected Rotational Velocities and Stellar Characterization of 350 B Stars in the Nearby Galactic Disk|journal=The Astronomical Journal|volume=144|issue=5|pages=130|year=2012|last1=Bragança|first1=G. A.|last2=Daflon|first2=S.|last3=Cunha|first3=K.|last4=Bensby|first4=T.|last5=Oey|first5=M. S.|last6=Walth|first6=G.|s2cid=118868235}}

}}

Category:B-type main-sequence stars

Category:Circumstellar disks

Category:Taurus (constellation)

Category:Durchmusterung objects